Watercolor Techniques

Artist working



watercolor palette



Techniques

Watercolor painting has the reputation of being quite demanding; it is more accurate to say that watercolor techniques are unique to watercolor. Unlike oil or acrylic painting, where the paints essentially stay where they are put and dry more or less in the form they are applied, water is an active and complex partner in the watercolor painting process, changing both the absorbency and shape of the paper when it is wet and the outlines and appearance of the paint as it dries. The difficulty in watercolor painting is almost entirely in learning how to anticipate and leverage the behavior of water, rather than attempting to control or dominate it.

Many difficulties occur because watercolor paints do not have high hiding power, so previous efforts cannot simply be painted over; and the paper support is both absorbent and delicate, so the paints cannot simply be scraped off, like oil paint from a canvas, but must be laboriously (and often only partially) lifted by rewetting and blotting. This often induces in student painters a pronounced and inhibiting anxiety about making an irreversible mistake. Watercolor has a longstanding association with drawing or engraving, and the common procedure to curtail such mistakes is to make a precise, faint outline drawing in pencil of the subject to be painted, to use small brushes, and to paint limited areas of the painting only after all adjacent paint areas have completely dried.

Another characteristic of watercolor paints is that the carbohydrate binder is only a small proportion of the raw paint volume, and much of the binder is drawn between the hydrophilic cellulose fibers of wet paper as the paint (and paper) dries. As a result, watercolor paints do not form an enclosing layer of vehicle around the pigment particles and a continuous film of dried vehicle over the painting support, but leave pigment particles scattered and stranded like tiny grains of sand on the paper. This increases the scattering of light from both the pigment and paper surfaces, causing a characteristic whitening or lightening of the paint color as it dries. The exposed pigment particles are also naked to damaging ultraviolet light, which can compromise pigment permanency.

Watercolor paint is traditionally and still commonly applied with brushes, but modern painters have experimented with many other implements, particularly sprayers, scrapers, sponges or sticks, and have combined watercolors with pencil, charcoal, crayon, chalk, ink, engraving, monotype, lithography and collage, or with acrylic paint.

Many watercolor painters, perhaps uniquely among all modern visual artists, still adhere to prejudices dating from the 19th century rivalry between "transparent" and bodycolor painters. Among these are injunctions never to use white paint, never to use black paint, only to use transparent color, or only to work with "primary" color mixtures. In fact, many superb paintings flout some or all of these guidelines, and they have little relevance to modern painting practice.

Perhaps only with the exception of egg tempera, watercolor is the painting medium that artists most often compound themselves, by hand, using raw pigment and paint ingredients purchased from retail suppliers and prepared using only kitchen utensils. Even with commercially prepared paints, watercolor is prized for its nontoxic, tap ready solvent; lack of odor or flammability; prompt drying time; ease of cleanup and disposal; long shelf life; independence from accessory equipment (jars, rags, easels, stretchers, etc.). Its portability makes it ideal for plein air painting, and painters today can buy compact watercolor kits -- containing a dozen or more pan paints, collapsible brushes, water flask, brush rinsing cup and fold out mixing trays -- that fit neatly into a coat pocket.


Washes and glazes

Basic watercolor technique includes washes and glazes. In watercolors, a wash is the application of diluted paint in a manner that disguises or effaces individual brush strokes to produce a unified area of color. Typically, this might be a light blue wash for the sky. There are many techniques to produce an acceptable wash, but the student method is to tilt the paper surface (usually after fixing it to a rigid flat support) so that the top of the wash area is higher than the bottom, then to apply the paint in a series of even, horizontal brush strokes in a downward sequence, each stroke just overlapping the stroke above to pull downward the excess paint or water (the "bead"), and finally wicking up the excess paint from the last stroke using a paper towel or the tip of a moist brush. This produces an airy, translucent color effect unique to watercolors, especially when a granulating or flocculating pigment (such as viridian or ultramarine blue) is used. Washes can be "graded" or "graduated" by adding more prediluted paint or water to the mixture used in successive brush strokes, which darkens or lightens the wash from start to finish. "Variegated" washes, which blend two or more paint colors, can also be used, for example as a wash with areas of blue and perhaps some red or orange for a sky at sunrise or sunset.

A glaze is the application of one paint color over a previous paint layer, with the new paint layer at a dilution sufficient to allow the first color to show through. Glazes are used to mix two or more colors, to adjust a color (darken it or change its hue or chroma), or to produce an extremely homogenous, smooth color surface or a controlled but delicate color transition (light to dark, or one hue to another). The last technique requires the first layer to be a highly diluted consistency of paint; this paint layer dissolves the surface sizing of the paper and loosens the cellulose tufts in the pulp. Subsequent layers are applied at increasingly heavier concentrations, always using a small round brush, only after the previous paint application has completely dried. Each new layer is used to refine the color transitions or to efface visible irregularities in the existing color. Painters who use this technique may apply 100 glazes or more to create a single painting. This method is currently very popular for painting high contrast, intricate subjects, in particular colorful blossoms in crystal vases brightly illuminated by direct sunlight. The glazing method also works exceptionally well in watercolor portraiture, allowing the artist to depict complex flesh tones effectively.


Wet in wet

Wet in wet includes any application of paint or water to an area of the painting that is already wet with either paint or water. In general, wet in wet is one of the most distinctive features of watercolor painting and the technique that produces a striking painterly effect.

The essential idea is to wet the entire sheet of paper, laid flat, until the surface no longer wicks up water but lets it sit on the surface, then to plunge in with a large brush saturated with paint. This is normally done to define the large areas of the painting with irregularly defined color, which is then sharpened and refined with more controlled painting as the paper (and preceding paint) dries.

Wet in wet actually comprises a variety of specific painting effects, each produced through different procedures. Among the most common and characteristic:

Backruns (also called blossoms, blooms, oozles, watermarks or runbacks). Because the hydrophilic and closely spaced cellulose fibers of the paper provide traction for capillary action, water and wet paint have a strong tendency to migrate from wetter to drier surfaces of the painting. As the wetter area pushes into the dryer, it plows up pigment along its edge, leaving a lighter colored area behind it and a darker band of pigment along an irregular, serrated edge. Backruns can be subtle or pronounced, depending on the consistency of the paint in the two areas and the amount of moisture imbalance. Backruns can be induced by adding more paint or water to a paint area as it dries, or by blotting (drying) a specific area of the painting, causing the wetter surrounding areas to creep into it. Backruns are often used to symbolize a flare of light or the lighting contour on an object, or simply for decorative effect.

Paint Diffusion. Because of osmotic imbalance, concentrated paint applied to a prewetted paper has a tendency to diffuse or expand into the pure water surrounding it, especially if the paint has been milled using a dispersant (surfactant). This produces a characteristic feathery, delicate border around the color area, which can be enhanced or partially shaped by tilting the paper surface before the water dries, shaping the diffusion with surface water flow.
Pouring Color. Some artists pour large quantities of slightly diluted paint onto separate areas of the painting surface, then by using a brush, spray bottle of water and/or judicious tilting of the painting support, cause the wet areas to gently merge and mix. After the color has been mixed and allowed to set for a few minutes, the painting is tipped vertically to sheet off all excess moisture (the lighter colors across the darker ones), leaving behind a paper stained with random, delicate color variations, which can be further shaped with a wet brush or added paint while the paper is still wet. A popular variation uses separate areas of red, yellow and blue paint, which when mingled and drained produce a striking effect of light in darkness; areas of white are reserved by first covering them with plastic film, masking tape or a liquid latex resist. (The technique was actually invented, and used for similar effect, by J.M.W. Turner.)

Dropping In Color. In this technique a color area is first precisely defined with diluted paint or clear water, then more concentrated paint is dropped into it by touching the wet area with a brush charged with paint. The added paint can be shaped by tilting or stroking; backruns can be induced by adding pure water or concentrated paint, or the color can be lightened by wicking up paint with a moist brush. A striking, tesselated effect is produced when many precisely defined and interlocking areas are separately colored with this randomly diffusing technique.
Salt Texture. Grains of coarse salt, sprinkled into moist paint, produce small, snowflake like imperfections in the color. This is especially effective when the color area is a wash that displays the texture more clearly. A similar effect can be produced by spraying a moist (not shiny but still cool to the touch) paint area with water, using a spray bottle held two or three feet above the painting surface, or by sprinking a wet paint with coarse sand or sawdust.

Watercolor painters also learn to apply paint to paper and then, when the paint has dried to the right point, brush along the edge of the paint with a flat, mop or sky brush charged with a moderate amount of clear water. This new area of water pulls the wet paint outward in a diffusion fan that is controlled by judging the wetness of the paint and the amount of water applied; if excessive water is used, this brushing produces both an outward diffusion and a backrun into the drying paint. This method is useful to produce transitions in value or color within narrow bands, such as the locks of hair in a portrait head.


Drybrush

At the other extreme from wet in wet techniques, Drybrush is the watercolor painting technique for precision and control, supremely exemplified in many botanical paintings and in the drybrush watercolors of Andrew Wyeth. Raw (undiluted) paint is picked up with a premoistened, small brush (usually a #4 or smaller), then applied to the paper with small hatching or crisscrossing brushstrokes. The brush tip must be wetted but not overcharged with paint, and the paint must be just fluid enough to transfer to the paper with slight pressure and without dissolving the paint layer underneath. The goal is to build up or mix the paint colors with short precise touches that blend to avoid the appearance of pointilism. The cumulative effect is objective, textural and highly controlled, with the strongest possible value contrasts in the medium. Often it is impossible to distinguish a good drybrush watercolor from a color photograph or oil painting, and many drybrush watercolors are varnished or lacquered after they are completed to enhance this resemblance.

Scumbling (in the 19th century, called "crumbling color" or "dragging color") is an unrelated technique of loading a large, moist flat or round brush with concentrated paint, wicking out the excess, then lightly dragging the side or heel of the tuft across the paper to produce a rough, textured appearance, for example to represent beach grass, rocky surfaces or glittering water. The amount of texture that can be produced depends on the finish or tooth of the paper (R or CP paper works best), the size of the brush, the consistency and quantity of the paint in the brush, and the pressure and speed of the brush stroke. Moist paper will cause the scumbled color to diffuse slightly before it dries.


Diluting and mixing watercolor paints

When using watercolors, it is important to use the full range of paint consistency. The densest possible color is obtained by using the paint as it comes from the tube. The lightest color is obtained by using paint heavily diluted with water, or applied to the paper and then blotted away with a paper towel. Generally, paint directly from the tube should be used only with drybrush application: if the paint is used to completely cover the paper it typically dries to a dull, leathery appearance (called bronzing). Usually one part tube paint must be diluted with 2 to 3 parts water to eliminate bronzing in paint applied with a large brush to dry paper; with 4 to 6 parts water to produce the most saturated color; and with still more water to produce delicate tints of color and to enhance pigment textures (granulation or flocculation). The main point is to take advantage of the complete range of paint effects that are produced at different paint consistencies.

Tube paints are normally used with a flat palette that provides compartmentalized paint wells (for holding separate paint colors) and a large mixing area for mixing or diluting paints; pan paints are arrayed in enameled metal paint boxes that provide shallow mixing areas in the folding cover or in a fold out faceted tray. With tube paints, the excess paint remaining in the palette paint wells should be cleaned out only if the paint has become dirtied with another paint; otherwise the paints should be allowed to dry out promptly and completely, as this prevents mold from forming. Despite the common misconception, there is no visual difference between the viscous paint packaged in tubes and the dried paints in pans. Tube paints left to dry in paint wells are used in exactly the same way as pan paints -- the painter simply drips or sprays water over the paint a few minutes before starting work. The only notable difference is that some tube paints, such as viridian or cerulean blue, produce a gritty, uneven paint mixture when left to dry and then rewetted.

There are three finesses to color mixtures with watercolors. First, the raw or "pure" paint in the paint wells should never be discolored with any other paint. To ensure this, colors are mixed by picking up the desired quantity of dissolved paint from the prewetted paint well, using a moist, clean brush, then applying the paint onto the flat mixing area of the palette. Then the brush is rinsed before picking up any other paint. Once all paints are on the mixing area, they are mixed and/or applied to the painting.

Second, colors can be mixed in at least four ways: (1) by completely mixing together on the palette the paints that exactly match a desired color; (2) by loading together in a large brush the separate paints that approximately match the desired color, then letting these partially mix as the paint is applied to the paper; (3) by laying down first a single paint color, then "dropping in" the remaining paint colors with the brush while the painted area is still wet; (4) by glazing the paints as separate layers, one over another. Each technique has its purpose -- the first provides color accuracy (for photorealist painting), the second provides color variety (especially in dark colors), the third produces many "wet in wet" effects between wetter and drier paint areas (for greater color expressiveness), the fourth can produce a variety of luminous, iridescent or "broken color" effects, similar to mixtures with pastel chalks.

Third, watercolors should be used confidently: applied with a single stroke or joined strokes, then left alone to dry. Color muddiness or dullness typically comes from excessively brushing wet paint after it has been applied to the paper, or adding new layers of paint onto paper that has soaked water into its pulp (capillary action draws the paint inside the paper, dulling the color, rather than letting it dry on the surface). Overbrushing and "color soaking" are the most common flaws of novice watercolor paintings.


Minimal palettes

Palette is also the term for a specific selection of paints (or "colors") and, as a matter of economy, convenience or technique, painters have often preferred palettes comprising the smallest practical selection of paints. Many professional watercolorists work routinely with a palette of a dozen or fewer paints.

Though commercial watercolor brands offer selections of up to 100 or more paint colors in tubes, subtractive pigment mixtures can produce a complete range of colors from a small number of specific paints. In the 19th century a six paint "split primary" palette became popular and is still advocated by older painters. It is based on the three subtractive primary colors (red, yellow and blue), each in a "warm" and "cool" version:

"warm" yellow: Cadmium Yellow Medium (PY35)
"cool" yellow: Cadmium Lemon (PY35)
"warm" red: Cadmium Scarlet (PR108)
"cool" red: Quinacridone Carmine (PV19)
"warm" blue: Ultramarine Blue (PB29)
"cool" blue": Phthalo Blue (Green Shade) (PB15)
The reason for this intricate selection was that bright or saturated mixtures were only produced by related primary colors, e.g. the brightest orange is the mixture of a yellow with some red in it (warm yellow) and a red with some yellow in it (warm red); the brightest green is the mixture of a yellow with some blue in it (cool yellow) with a blue with some yellow in it (cool blue); duller mixtures are produced by mixing contrasted primaries, and the dullest mixtures by mixing three primaries.

The modern approach (the hexachrome palette) also relies on six paints, but spaces them more equally around the hue circle so that their mixtures automatically produce the most saturated color in every hue:

yellow: Cadmium Yellow Pale (PY35 or PY37) or Benzimidazolone Yellow (PY151 or PY154)
red orange: Pyrrol Orange (PO73) or Cadmium Scarlet (PR108)
magenta: Quinacridone Magenta (PR122) or Quinacridone Rose (PV19)
blue violet: Ultramarine Blue (PB29)
cyan: Phthalo Turquoise (PB16) or Phthalo Cyan (PB17)
green: Phthalo Green (PG7 Blue Shade or PG36 Yellow Shade)
Both palettes obtain dull or darkened colors, including a "neutral" (dark gray or black), by mixing together paints or colors on opposite sides of the hue circle -- especially orange or scarlet with cyan, and carmine or magenta with green.

As a matter of convenience, painters typically also add one or more paints made with an iron oxide pigment (the so called "earth" pigments, many of them manufactured as concrete colorants or wood stains) and sold under the names yellow ochre, raw sienna, raw umber, burnt sienna, burnt umber and/or venetian red. Exactly the same brown or ochre colors can be matched with either of the six paint palettes, but it tedious to do. As dark colors also require inconvenient mixing, most painters prefer to add a premixed dark neutral paint containing a carbon (black) pigment, usually sold under the marketing names indigo, payne's gray, neutral tint or sepia.


Paint Lightfastness

A final consideration is lightfastness, or the ability of a pigment to retain its original color appearance under exposure to light. This is usually indicated as a numerical rating, from I (high lightfastness) to III or IV (low lightfastness), on the paint tube or in the paint technical information available from the manufacturer. Lightfastness is a crucial issue with watercolors, because the paint pigment is not surrounded by a protective dried binder (as in oil or acrylic paints) but is left exposed on the surface of the paper. Watercolors acquired in the 19th century a market reputation for relative impermanence that continues to suppress their price today, and painters who admire this medium will make choices to improve its market status: in fact, lightfast watercolor paints on archival papers are as durable as any oil painting on canvas.

Unfortunately, paint manufacturer lightfastness ratings are not always trustworthy. However, because they have been demonstrated to be impermanent in watercolors, certain pigments (paints) should never be used under any circumstances. These include: aureolin (PY40), alizarin crimson (PR83), genuine rose madder (NR9), genuine carmine (NR4), genuine vermilion (PR106), most naphthol reds and oranges, all dyes (including most "liquid watercolors" and marker pens), and paints premixed with a white pigment, including paints marketed under the names naples yellow, emerald green or antwerp blue. Most of these are colorants invented in the 19th century or before that have been superseded by far more durable modern alternatives, and these are usually sold as "hue" paints (e.g., "alizarin crimson hue" is a modern pigment that resembles alizarin crimson). Industry labeling practice is to include a lightfastness rating on the paint packaging, and painters should only use paints that have a lightfastness rating of I or II under the testing standards published the American Society of Testing and Materials (now ASTM International).


References

History
Martin Hardie. Water-Colour Painting in Britain (3 volumes: I. The Eighteenth Century; II. The Romantic Period; III. The Victorian Period.). Batsford, 1966-1968. ISBN 113184131X
Michael Clarke. The Tempting Prospect: A Social History of English Watercolors. British Museum Publications, 1981. ASIN B000UCV0XO
Christopher Finch. Nineteenth-Century Watercolors. Abbeville Press, 1991. ISBN 1558590196
Christopher Finch. American Watercolors. Abbeville Press, 1991. ASIN B000IBDWGK
Christopher Finch. Twentieth-Century Watercolors. Abbeville Press, 1988. ISBN 089659811X
Andrew Wilton & Anne Lyles. The Great Age of British Watercolours (1750-1880). Prestel, 1993. ISBN 3-7913-1254-5
Anne Lyles & Robin Hamlyn. British watercolours from the Oppé Collection. Tate Gallery Publishing, 1997. ISBN 1-85437-240-8
Eric Shanes. Turner: The Great Watercolours. Royal Academy of Arts, 2001. ISBN 0-8109-6634-4

Tutorials & Technique
John Ruskin. The Elements of Drawing [1857]. Watson-Guptill, 1991. ISBN 0-8230-1602-1 (Reprints from other publishers are also available.)
Rex Brandt. The Winning Ways of Watercolor: Basic Techniques and Methods of Transparent Watercolor in Twenty Lessons. Van Nostrand Reinhold, 1973. ISBN 0-442-21404-9
Edgar A. Whitney. Complete Guide to Watercolor Painting. Watson-Guptill, 1974. [Dover Edition ISBN 0-486-41742-5]
Stan Smith. Watercolor: The Complete Course. Reader's Digest, 1995. ISBN 0-89577-653-7
David Dewey. The Watercolor Book: Materials and Techniques for Today's Artist. Watson-Guptill, 1995. ISBN 0-8230-5641-4
Pip Seymour. Watercolour Painting: A Handbook for Artists. Lee Press, 1997. ISBN 0-9524727-4-0
Charles LeClair. The Art of Watercolor (Revised and Expanded Edition). Watson-Guptill, 1999. ISBN 0-8230-0292-6
Curtis Tappenden. Foundation Course: Watercolour. Cassell Illustrated, 2003. ISBN 1844030822
Royal Watercolour Society. The Watercolour Expert. Cassell Illustrated, 2004. ISBN 1844031497

Materials
Jacques Turner. Brushes: A Handbook for Artists and Artisans. Design Press, 1992. ISBN 0830639756
Sylvie Turner. The Book of Fine Paper. Thames & Hudson, 1998. ISBN 0500018715
Ian Sideway. The Watercolor Artist's Paper Directory. North Light, 2000. ISBN 1581800347

Watercolor Materials

Materials

A set of watercolors.
Paint
Paints comprise four principal ingredients:

colorant, commonly pigment (an insoluble inorganic compound or metal oxide crystal, or an organic dye fused to an insoluble metal oxide crystal);
binder, the substance that holds the pigment in suspension and fixes the pigment to the painting surface; additives, substances that alter the viscosity, hiding, durability or color of the pigment and vehicle mixture; and
solvent, the substance used to thin or dilute the paint for application and that evaporates when the paint hardens or dries.

The term "watermedia" refers to any painting medium that uses water as a solvent and that can be applied with a brush, pen or sprayer; this includes most inks, watercolors, temperas, gouaches and modern acrylic paints. The term watercolor refers to paints that use water soluble, complex carbohydrates as a binder. Originally (16th to 18th centuries) watercolor binders were sugars and/or hide glues, but since the 19th century the preferred binder is natural gum arabic, with glycerin and/or honey as additives to improve plasticity and dissolvability of the binder, and with other chemicals added to improve product shelf life. Bodycolor is a watercolor made as opaque as possible by a heavy pigment concentration, and gouache is a watercolor made opaque by the addition of a colorless opacifier (such as chalk or zinc oxide). Modern acrylic paints are based on a completely different chemistry that uses water soluble acrylic resin as a binder.

Watercolor painters before c.1800 had to make paints themselves using pigments purchased from an apothecary or specialized "colourman"; the earliest commercial paints were small, resinous blocks that had to be wetted and laboriously "rubbed out" in water. Modern commercial watercolor paints are available in two forms: tubes or pans. The majority of paints sold are in collapsable metal tubes in standard sizes (typically 7.5, 15 or 37 ml.), and are formulated to a consistency similar to toothpaste. Pan paints (actually, small dried cakes or bars of paint in an open plastic container) are usually sold in two sizes, full pans (approximately 3 cc of paint) and half pans (favored for compact paint boxes). Pans are historically older but commonly perceived as less convenient; they are most often used in portable metal paint boxes, also introduced in the mid 19th century, and are preferred by landscape or naturalist painters. Among the most widely used brands of commercial watercolors today are Daniel Smith, Daler Rowney, DaVinci, Holbein, Maimeri, M. Graham, Schmincke, Talens (Rembrandt), and Winsor & Newton.

Thanks to modern industrial organic chemistry, the variety, saturation (brilliance) and permanence of artists' colors available today is greater than ever before. However, the art materials industry is far too small to exert any market leverage on global dye or pigment manufacture. With rare exceptions, all modern watercolor paints utilize pigments that were manufactured for use in printing inks, automotive and architectural paints, wood stains, concrete, ceramics and plastics colorants, consumer packaging, foods, medicines, textiles and cosmetics. Paint manufacturers buy very small supplies of these pigments, mill (mechanically mix) them with the vehicle, solvent and additives, and package them.

Many artists are confused or misled by labeling practices common in the art materials industry. The marketing name for a paint, such as "cobalt blue" or "emerald green", is often only a poetic color evocation or proprietary moniker; there is no legal requirement that it describe the pigment that gives the paint its color. To remedy this confusion, in 1990 the art materials industry voluntarily began listing pigment ingredients on the paint packaging, using the common pigment name (such as "cobalt blue" or "cadmium red"), and/or a standard pigment identification code, the generic color index name (PB28 for cobalt blue, PR108 for cadmium red) assigned by the Society of Dyers and Colourists (UK) and the American Association of Textile Chemists and Colorists (USA). This allows artists to choose paints according to their pigment ingredients, rather than the poetic labels assigned to them by marketers. Paint pigments and formulations vary across manufacturers, and watercolor paints with the same color name (e.g., "sap green") from different manufacturers can be formulated with completely different ingredients.

Watercolor paints are customarily evaluated on a few key attributes. In the partisan debates of the 19th century English art world, gouache was emphatically contrasted to traditional watercolors and denigrated for its lack of "transparency" or hiding power; "transparent" watercolors were exalted. Paints with low hiding power are valued because they allow an underdrawing or engraving to show in the image, and because colors can be mixed visually by layering paints on the paper (which itself may be either white or tinted). In fact, there are very few genuinely transparent watercolors, neither are there completely opaque watercolors (with the exception of gouache); and any watercolor paint can be made more transparent simply by diluting it with water. The 19th century claim that "transparent" watercolors gain "luminosity" because they function like a pane of stained glass laid on paper -- the color intensified because the light passes through the pigment, reflects from the paper, and passes a second time through the pigment on its way to the viewer -- is false: watercolor paints do not form a cohesive paint layer, as do acrylic or oil paints, but simply scatter pigment particles randomly across the paper surface.

Staining is another characteristic assigned to watercolor paints: a staining paint is difficult to remove or lift from the painting support after it has been applied or dried. Less staining colors can be lightened or removed almost entirely when wet, or when rewetted and then "lifted" by stroking gently with a clean, wet brush and then blotted up with a paper towel. In fact, the staining characteristics of a paint depend in large part on the composition of the support (paper) itself, and on the particle size of the pigment. Staining is increased if the paint manufacturer uses a dispersant to reduce the paint milling (mixture) time, because the dispersant acts to drive pigment particles into crevices in the paper pulp, dulling the finished color.

Granulation refers to the appearance of separate, visible pigment particles in the finished color, produced when the paint is substantially diluted with water and applied with a juicy brush stroke; pigments notable for their watercolor granulation include viridian (PG18), cerulean blue (PG35), cobalt violet (PV14) and some iron oxide pigments (PBr7). "Flocculation" refers to a peculiar clumping typical of ultramarine pigments (PB29 or PV15). Both effects display the subtle effects of water as the paint dries, are unique to watercolors, and are deemed attractive by accomplished watercolor painters. Regrettably the trend in commercial paints seems to be to suppress pigment textures in favor of homogeneous, flat color.

Commercial watercolor paints come in two grades: "Artist" (or "Professional") and "Student". Artist quality paints are usually formulated using a single pigment, which results in richer color and vibrant mixes. Student grade paints have less pigment, and often are formulated using two or more less expensive pigments. Artist and Professional paints are more expensive but many consider the quality worth the higher cost.

As there is no transparent white watercolor, the white parts of a watercolor painting are most often areas of the paper "reserved" (left unpainted) and allowed to be seen in the finished work. To preserve these white areas, many painters use a variety of resists, including masking tape or a liquid latex, that are applied to the paper to protect it from paint, then pulled away to reveal the white paper. White paint (titanium dioxide PW6 or zinc oxide PW4) is best used to insert highlights or white accents into a painting. If mixed with other pigments, white paints may cause them to fade or change hue under light exposure.


Brushes

Artist working on a watercolor using a round brush.A brush consists of three parts: the tuft, the ferrule and the handle. The tuft is a bundle of animal hairs or synthetic fibers tied tightly together at the base; the ferrule is a metal sleeve that surrounds the tuft, gives the tuft its cross sectional shape, provides mechanical support under pressure, and protects from water the glue joint between the trimmed, flat base of the tuft and the lacquered wood handle, which is typically shorter in a watercolor brush than in an oil painting brush, and also has a distinct shape -- widest just behind the ferrule and tapering to the tip.

Brushes hold paint (the "bead") through the capillary action of the small spaces between the tuft hairs or fibers; paint is released through the contact between the wet paint and the dry paper and the mechanical flexing of the tuft, which opens the spaces between the tuft hairs, relaxing the capillary restraint on the liquid. Because thinned watercolor paint is far less viscous than oil or acrylic paints, the brushes preferred by watercolor painters have a softer and denser tuft. This is customarily achieved by using natural hair harvested from farm raised or trapped animals, in particular sable, squirrel or mongoose. Less expensive brushes, or brushes designed for coarser work, may use horsehair or bristles from pig or ox snouts and ears. However, as with paints, modern chemistry has developed many synthetic and shaped fibers that rival bristle and even hair for softeness and flexibility.

There is no market regulation on the labeling applied to artists' brushes, but most watercolorists prize brushes from kolinsky (Russian or Chinese) sable. The best of these hairs have a characteristic reddish brown color, darker near the base, and a tapering shaft that is pointed at the tip but widest about halfway toward the root. Squirrel hair is quite thin, straight and typically dark, and makes tufts with a very high liquid capacity; mongoose has a characteristic salt and pepper coloring. Bristle brushes are stiffer and lighter colored. "Camel" is sometimes used to describe hairs from several sources (none of them a camel).

Natural and synthetic brushes are sold with the tuft shaped for different tasks. Among the most popular are:

Rounds. The tuft has a round cross section but a tapering profile, widest near the ferrule (the "belly") and tapered at the tip (the "point"). These are general purpose brushes that can address almost any task.
Flats. The tuft is compressed laterally by the ferrule into a flat wedge; the tuft appears square when viewed from the side and has a perfectly straight edge. "Brights" are flats in which the tuft is as long as it is wide; "one stroke" brushes are longer than their width. "Sky brushes" or "wash brushes" look like miniature housepainting brushes; the tuft is usually 3 cm to 7 cm wide and is used to paint large areas.

Mops (natural hair only). A round brush, usually of squirrel hair and, decoratively, with a feather quill ferrule that is wrapped with copper wire; these have very high capacity for their size, especially good for wet in wet or wash painting; when moist they can wick up large quantities of paint.

Filbert (or "Cat's Tongue", hair only). A hybrid brush: a flat that comes to a point, like a round, useful for specially shaped brush strokes.
Rigger (hair only). An extremely long, thin tuft, originally used to paint the rigging in nautical portraits.

Fan. A small flat in which the tuft is splayed into a fan shape; used for texturing or painting irregular, parallel hatching lines.

Acrylic. A flat brush with synthetic bristles, attached to a (usually clear) plastic handle with a beveled tip used for scoring or scraping.

A single brush can produce many lines and shapes. A "round" for example, can create thin and thick lines, wide or narrow strips, curves, and other painted effects. A flat brush when used on end can produce thin lines or dashes in addition to the wide swath typical with these brushes, and its brushmarks display the characteristic angle of the tuft corners.

The size of a round brush is designated by a number, which may range from 0000 (for a very tiny round) to 0, then from 1 to 24 or higher. These numbers refer to the size of the brass brushmakers' mould used to shape and align the hairs of the tuft before it is tied off and trimmed, and as with shoe lasts, these sizes vary from one manufacturer to the next. In general a #12 round brush has a tuft about 2 to 2.5 cm long; tufts are generally fatter (wider) in brushes made in England than in brushes made on the Continent: a German or French #14 round is approximately the same size as an English #12. Flats may be designated either by a similar but separate numbering system, but more often are described by the width of the ferrule, measured in centimeters or inches.

In general, natural hair brushes have superior snap and pointing, a higher capacity (hold a larger bead, produce a longer continuous stroke, and wick up more paint when moist) and a more delicate release. Synthetic brushes tend to dump too much of the paint bead at the beginning of the brush stroke and leave a larger puddle of paint when the brush is lifted from the paper, and they cannot compete with the pointing of natural sable brushes and are much less durable. On the other hand they are typically much cheaper than natural hair, and the best synthetic brushes are now very serviceable; they are also excellent for texturing, shaping, or lifting color, and for the mechanical task of breaking up or rubbing paint to dissolve it in water.

A high quality sable brush has five key attributes: pointing (in a round, the tip of the tuft comes to a fine, precise point that does not splay or split; in a flat, the tuft forms a razor thin, perfectly straight edge); snap (or "spring"; the tuft flexes in direct response to the pressure applied to the paper, and promptly returns to its original shape); capacity (the tuft, for its size, holds a large bead of paint and does not release it as the brush is moved in the air); release (the amount of paint released is proportional to the pressure applied to the paper, and the paint flow can be precisely controlled by the pressure and speed of the stroke as the paint bead is depleted); and durability (a large, high quality brush may withstand decades of daily use).

Most natural hair brushes are sold with the tuft cosmetically shaped with starch or gum, so brushes are difficult to evaluate before purchasing, and durability is only evident after long use. The most common failings of natural hair brushes are that the tuft sheds hairs (although a little shedding is acceptable in a new brush), the ferrule becomes loosened, or the wood handle shrinks, warps, cracks or flakes off its lacquer coating.

Every watercolor painter works in specific genres and has a personal painting style and "tool discipline", and these largely determine his or her preference for brushes. Artists typically have a few favorites and do most work with just one or two brushes. Brushes are typically the most expensive component of the watercolorist's tools, and a minimal general purpose brush selection would include:

4 round (for detail and drybrush)
8 round
12 or 14 round (for large color areas or washes)
1/2" or 1" flat
12 mop (for washes and wicking)
1/2" acrylic (for dissolving or mixing paints, and scrubbing paints before lifting from the paper)
Reputable watercolor brush manufacturers include DaVinci, Escoda, Isabey, Raphael, Kolonok, Robert Simmons and Winsor & Newton. As with papers and paints, it is common for retailers to commission brushes under their own label from an established manufacturer. Among the best of these are Cheap Joe's, Daniel Smith, Dick Blick and Utrecht.


Paper
Most watercolor painters before c.1800 had to use whatever paper was at hand: Thomas Gainsborough was delighted to buy some paper used to print a Bath tourist guide, and the young David Cox preferred a heavy paper used to wrap packages. James Whatman first offered a wove watercolor paper in 1788, and the first machinemade ("cartridge") papers from a steam powered mill in 1805.

All art papers can be described by eight attributes: furnish, color, weight, finish, sizing, dimensions, permanence and packaging. Watercolor painters typically paint on paper specifically formulated for watermedia applications. Fine watermedia papers are manufactured under the brand names Arches, Fabriano, Hahnemuehle, Lanaquarelle, Saunders Waterford, Strathmore, Winsor & Newton and Zerkall; and there has been a recent remarkable resurgence in handmade papers, notably those by Twinrocker, Velke Losiny, Ruscombe Mill and St. Armand.

The traditional furnish or material content of watercolor papers is cellulose, a structural carbohydrate found in many plants. The most common sources of paper cellulose are cotton, linen, or alpha cellulose extracted from wood pulp. To make paper, the cellulose is wetted, mechanically macerated or pounded, chemically treated, rinsed and filtered to the consistency of thin oatmeal, then poured out into paper making moulds. In handmade papers, the pulp is hand poured ("cast") into individual paper moulds (a mesh screen stretched within a wood frame) and shaken by hand into an even layer. In industrial paper production, the pulp is formed by large papermaking machines that spread the paper over large cylinders -- either heated metal cylinders that rotate at high speed (machinemade papers) or wire mesh cylinders that rotate at low speed (mouldmade papers). Both types of machine produce the paper in a continuous roll or web, which is then cut into individual sheets.

The basis weight of the paper is a measure of its density and thickness. It is described as the gram weight of one square meter of a single sheet of the paper, or grams per square meter (gsm). Most watercolor papers sold today are in the range between 280gsm to 640gsm. (The previous Imperial system, expressed as the weight in pounds of one ream or 500 sheets of the paper, regardless of its size, is now obsolete.) Watercolor papers are typically almost a pure white, sometimes slightly yellow, though many tinted or colored papers are available. An important diagnostic is the rattle of the paper, or the sound it makes when held aloft by one corner and shaken vigorously. Papers that are dense and made from heavily macerated pulp have a bright, metallic rattle, while papers that are spongy or made with lightly macerated pulp have a muffled, rubbery rattle.

All papers obtain a texture from the mould used to make them: a wove finish results from a uniform metal screen (likea window screen); a laid finish results from a screen made of narrowly spaced horizontal wires separated by widely spaced vertical wires. The finish is also affected by the methods used to wick and dry the paper after it is "couched" (removed) from the paper mold or is pulled off the papermaking cylinder.

Watercolor papers come in three basic finishes: hot pressed (HP), cold press (CP, or in the UK "Not", for "not hot pressed"), and rough (R).

Rough papers are typically dried by hanging them like laundry ("loft drying") so that the sheets are not exposed to any pressure after they are couched; the wove finish has a pitted, uneven texture that is prized for its ability to accent the texture of watercolor pigments and brushstrokes.
Cold pressed papers are dried in large stacks, between absorbent felt blankets; this acts to flatten out about half of the texture found in the rough sheets. CP papers are valued for their versatility.
Hot pressed papers are cold pressed sheets that are passed through heated, compressing metal cylinders (called "calendaring"), which flattens amost all the texture in the sheets. HP papers are valued because they are relatively nonabsorbent: pigments remain on the paper surface, brightening the color, and water is not absorbed, so it can produce a variety of water stains or marks as it dries.
These designations are only relative; the CP paper from one manufacturer may be rougher than the R paper from another manufacturer. Fabriano even offers a "soft press" (SP) sheet intermediate between CP and HP.

Watercolor papers are traditionally sized, or treated with a substance to reduce the cellulose absorbency. Internal sizing is added to the paper pulp after rinsing and before it is cast in the paper mould; external or "tub" sizing is applied to the paper surface after the paper has dried. The traditional sizing has been gelatin, gum arabic or rosin, though modern synthetic substitutes (alkyl-ketene dimers such as Aquapel) are now used instead. The highly absorbent papers that contain no sizing are designated waterleaf.

Most art papers are sold as single sheets of paper in standard sizes. Most common is the full sheet (22" x 30"), and half sheets (15" x 22") or quarter sheets (15" x 11") derived from it. Larger (and less standardized) sheets include the double elephant (within an inch or two of 30" x 40") and emperor (40" x 60"), which are the largest sheets commercially available. Papers are also manufactured in rolls, up to about 60" wide and 30 feet long. Finally, papers are also sold as watercolor "blocks" -- a pad of 20 or so sheets of paper, cut to identical dimensions and glued on all four sides, which provides high dimensional stability and portability, though block papers tend to have subdued finishes. The painter simply works on the exposed sheet and, when finished, uses a knife to cut the adhesive around the four sides, separating the painting and revealing the fresh paper underneath.

Finally, the best art papers are designated archival, meaning they will last without significant deterioration for a century or more. Archival means that the papers are made entirely of high alpha cellulose or 100% cotton or linen fiber (that is, they are lignen free, as lignen causes the darkening and embrittlement under light exposure), pH neutral (meaning there is no residual acidity left from the chemical processing of the pulp), buffered (a small quantity of an alkaline compound, usually calcium carbonate, is added to the furnish to neutralize the effect of atmospheric acids), and free of any artificial paper brighteners or whiteners (e.g., ultraviolet dyes). The content designations "100% cotton" or "100% cotton rag" have little significance to the actual quality or handling attributes of the paper. (A wide range of papers using alternative plant fibers, some of them not archival, are available from Asian manufacturers; some watercolor painters even employ sheets of printable plastic, sold under brand names such as Yupo.)

A useful test of paper quality is simply to burn a small piece of the paper in an ashtray: pure cellulose completely burns away to a wispy, whitish gray ash. The absorbency of a paper is assessed by licking it. The mechanical strength of the paper is assessed by repeatedly folding it back and forth along a single crease. The stability of the paper (amount of cockling when soaked) and its response to lifting paint (the paper should not shred or tear) is best tested by making a painting on it.

All cellulose fibers absorb moisture and expand along the length of the fiber when wet; this produces the familiar buckling or warping called cockling. Evenly wetted, machinemade papers typically curl along one dimension, revealing the curvature of the cylinder they were formed on; some mouldmade papers and all handmade papers cockle in a random, uneven pattern. Handmade papers typically have four natural deckles (feathery, uneven edges) left by the paper mould; mouldmade papers have two natural deckles along the edges of the web, and two simulated deckles produced by cutting the sheet with a jet of compressed water; machinemade papers have no deckles.

In the 19th century, before modern high quality and heavy weights of paper were available, watercolor painters preferred to "stretch" papers before painting on them, to minimize or eliminate cockling and to provide a firm painting support. The paper was first completely immersed in water for 10-15 minutes, then laid completely flat on a board. The paper edges were fixed with gummed tape, starch glue or tacks, and the paper was left to dry. (As paper dries it shrinks, producing a high tension across the paper surface; when painted on, this tension takes up the expansion produced by the paper cockling, so that the paper remains flat.) When the painting was finished, the gummed or glued edge of the paper, including the deckle (which was considered unsightly) was trimmed away. Many watercolor painters still stretch their papers, but because natural deckles are appreciated today for their decorative, handmade effect, the modern preference is to work on unstretched papers, either by using a heavier weight of paper, by allowing paper to dry out before it becomes too saturated, or by exploiting the artistic effects that cockling can produce.

Watercolor History

History

Although watercolor painting is extremely old, dating perhaps to the cave paintings of paleolithic Europe, and has been used for manuscript illumination since at least Egyptian times but especially in the European Middle Ages, its continuous history as an art medium begins in the Renaissance. The German artist Albrecht Dürer (1471-1528) who painted several fine botanical, wildlife and landscape watercolors, is generally considered among the earliest exponents of the medium. An important school of watercolor painting in Germany was led by Hans Bol (1534-1593) as part of the Dürer Renaissance.

Watercolor, Albertina, Vienna.Despite this early start, watercolors were generally used by Baroque easel painters only for sketches, copies or cartoons (small scale design drawings). Among notable early practitioners of watercolor painting were Van Dyck (during his stay in England), Claude Lorrain, Giovanni Benedetto Castiglione, and many Dutch and Flemish artists. However, botanical and wildlife illustrations are perhaps the oldest and most important tradition in watercolor painting. Botanical illustrations became popular in the Renaissance, both as hand tinted woodblock illustrations in books or broadsheets and as tinted ink drawings on vellum or paper. Botanical artists have always been among the most exacting and accomplished watercolor painters, and even today watercolors -- with their unique ability to summarize, clarify and idealize in full color -- are used to illustrate scientific and museum publications. Wildlife illustration reached its peak in the 19th century with artists such as John James Audubon, and today many naturalist field guides are still illustrated with watercolor paintings.

English school

Several factors contributed to the diffusion of watercolor painting during the 18th century, particularly in England. Among the elite and aristocratic classes, watercolor painting was one of the incidental adornments of a good education, especially for women. By contrast, watercoloring was also valued by surveyors, mapmakers, military officers and engineers for its usefulness in depicting properties, terrain, fortifications or geology in the field and for illustrating public works or commissioned projects. Watercolor artists were commonly brought with the geological or archaeological expeditions funded by the Society of Dilettanti (founded in 1733) to document discoveries in the Mediterranean, Asia and the New World. These stimulated the demand for topographical painters who churned out memento paintings of famous sites (and sights) along the Grand Tour to Italy that was traveled by every fashionable young man or woman of the time. In the late 18th century, the English cleric William Gilpin wrote a series of hugely popular books describing his "picturesque" journeys throughout rural England and illustrated with his own sentimentalized monochrome watercolors of river valleys, ancient castles and abandoned churches; his example popularized watercolors as a form of personal tourist journal. The confluence of these cultural, engineering, scientific, tourist and amateur interests culminated in the celebration and promotion of watercolor as a distinctly English "national art". Among the many significant watercolor artists of this period were Thomas Gainsborough, John Robert Cozens, Francis Towne, Michelangelo Rooker, William Pars, Thomas Hearne and John Warwick Smith. William Blake published several books of hand tinted engraved poetry, illustrations to Dante's Inferno, and also experimented with large monotype works in watercolor.

From the late 18th century through the 19th century, the market for printed books and domestic art contributed substantially to the growth of the medium. Watercolors were the used as the basic document from which collectible landscape or tourist engravings were developed, and handpainted watercolor originals or copies of famous paintings contributed to many upper class art portfolios. Satirical broadsides by Thomas Rowlandson, many published by Rudolph Ackermann, were also extremely popular.


The three English artists credited with establishing watercolor as an independent, mature painting medium are Paul Sandby (1730-1809), often called "the father of the English watercolor", Thomas Girtin (1775-1802), who pioneered its use for large format, romantic or picturesque landscape painting, and Joseph Mallord William Turner (1775-1851), who brought watercolor painting to the highest pitch of power and refinement and created with it hundreds of superb historical, topographical, architectural and mythological paintings. His method of developing the watercolor painting in stages, starting with large, vague color areas established on wet paper, then refining the image through a sequence of washes and glazes, permitted him to produce large numbers of paintings with workshop efficiency and made him a multimillionaire in part through sales from his personal art gallery, the first of its kind. Among the important and highly talented contemporaries of Turner and Girtin were John Varley, John Sell Cotman, Anthony Copley Fielding, Samuel Palmer, William Havell and Samuel Prout. The Swiss painter Louis Ducros was also widely known for his large format, romantic paintings in watercolor.

The confluence of amateur activity, publishing markets, middle class art collecting and 19th century painting technique led to the formation of English watercolor painting societies: the Society of Painters in Water Colours (1804, now known as the Royal Watercolour Society), and the New Water Colour Society (1832). (A Scottish Society of Painters in Water Colour was founded in 1878.) These societies provided annual exhibitions and buyer referrals for many artists and also engaged in petty status rivalries and esthetic debates, particularly between advocates of traditional ("transparent") watercolor and the early adopters of the denser color possible with bodycolor or gouache ("opaque" watercolor). The late Georgian and Victorian periods produced the zenith of the British watercolor, among the most impressive 19th century works on paper, by Turner, Varley, Cotman, David Cox, Peter de Wint, William Henry Hunt, John Frederick Lewis, Myles Birket Foster, Frederick Walker, Thomas Collier and many others. In particular, the graceful, lapidary and atmospheric genre paintings by Richard Parkes Bonington created an international fad for watercolor painting, especially in England and France, in the 1820's.

United states

Watercolor painting also became popular in the United States during middle 19th century; the American Society of Painters in Watercolor (now the American Watercolor Society) was founded in 1866. Major 19th century American exponents of the medium included William Trost Richards, Fidelia Bridges, Thomas Moran, Thomas Eakins, Henry Roderick Newman, John LaFarge and, preeminently, Winslow Homer. The popularity of watercolors stimulated many innovations, including heavier and more heavily sized wove papers and brushes (called "pencils") manufactured expressly for watercolor painting. Watercolor tutorials were first published in this period by Varley, Cox and others, innovating the step-by-step painting instructions that still characterizes the genre today; "The Elements of Drawing", a watercolor tutorial by the English art critic John Ruskin, has been out of print only once since it was first published in 1857. Commercial paintmaking brands appeared and paints were packaged in metal tubes or as dry cakes that could be "rubbed out" (dissolved) in studio porcelain or used in portable metal paint boxes in the field. Contemporary breakthroughs in chemistry made many new pigments available, including prussian blue, ultramarine blue, cobalt blue, viridian, cobalt violet, cadmium yellow, aureolin (potassium cobaltinitrite), zinc white and a wide range of carmine and madder lakes. These in turn stimulated a greater use of color throughout all painting media, but in English watercolors particularly by the Pre-Raphaelite painters.

Europe

Watercolor was less popular on the Continent, though many fine examples were produced by French painters, including Eugene Delacroix, François Marius Granet, Henri-Joseph Harpignies and the satirist Honore Daumier.


Unfortunately the careless and excessive adoption of brightly colored, petroleum derived aniline dyes (and pigments compounded from them), which all fade rapidly on exposure to light, and the efforts to properly conserve the 20,000 Turner paintings inherited by the British Museum in 1857, led to an examination and negative re-evaluation of the permanence of pigments in watercolor. This caused a sharp decline in their status and market value. Nevertheless, isolated exponents continued to prefer and develop the medium into the 20th century. In Europe, gorgeous landscape and maritime watercolors were produced by Paul Signac, and Paul Cezanne developed a watercolor painting style consisting entirely of overlapping small glazes of pure color.

In America, the most famous watercolor painters from this period include Maurice Prendergast, Frederick Childe Hassam, Charles Webster Hawthorne and John Singer Sargent, considered by many the finest watercolor painter of all time.



20th century

Mädchen, Egon Schiele 1911Among the many 20th century artists who produced important works in watercolor, mention must be made of Wassily Kandinsky, Emil Nolde, Paul Klee, Egon Schiele and Raoul Dufy; in America the major exponents included Charles Burchfield, Edward Hopper, Charles Demuth, Elliot O'Hara and above all John Marin, 80% of whose total output is in watercolor. In this period American watercolor (and oil) painting was often imitative of European Impressionism and Post-Impressionism, but significant individualism flourished within "regional" styles of watercolor painting in the 1920's to 1940's, in particular the "Cleveland School" or "Ohio School" of painters centered around the Cleveland Museum of Art, and the "California Scene" painters, many of them associated with Hollywood animation studios or the Chouinard Art Institute (now CalArts Academy). The California painters exploited their state's varied geography, Mediterranean climate and "automobility" to reinvigorate the outdoor or "plein air" tradition; among the most influential were Phil Dike, Millard Sheets, Rex Brandt, Dong Kingman and Milford Zornes. The California Water Color Society, founded in 1921 and later renamed the National Watercolor Society, sponsored important exhibitions of their work.


Late Fall, watercolour on paper, 67.3cm x 47cm, 1981, by Andrew WyethAlthough the rise of abstract expressionism, and the trivializing influence of amateur painters and advertising or workshop influenced painting styles, led to a general decline in the popularity of watercolor painting after c.1950, watercolors continue to be utilized by important artists such as Joseph Raffael, Andrew Wyeth, Philip Pearlstein, Eric Fischl, Gerard Richter and Francesco Clemente. Modern watercolor paints are now as durable and colorful as oil or acrylic paints, and the recent renewed interest in drawing and multimedia art has also stimulated demand for fine works in watercolor. As art markets continue to expand, painting societies continue to add members and aging Baby Boomers increasingly retire to more contemplative hobbies, watercolors seem poised to enter yet another "golden age".

The principles of Art

Principles of art

The principles of art are the set of rules or guidelines of art that are to be considered when considering the impact of a piece of artwork. They are combined with the elements of art in the production of art.[1][2] The principles are movement, unity, variety, balance, emphasis, contrast, proportion, and pattern.



Unity

Unity or harmony is the quality of wholeness or oneness that is achieved through the effective use of the elements and principles of art. The arrangement of elements and principles to create a feeling of completeness.

Variety

Variety is the quality or state of having different forms or types. The differences which give a design visual and conceptual interest: notably use of contrast, emphasis, difference in size, and so forth.


Balance

Balance is arranging elements so that no one part of a work overpowers, or seems heavier than any other part. Two different kinds of balance are symmetrical and asymmetrical. Symmetrical (or formal) balance is when both sides of an artwork, if split down the middle, appear to be the same. The human body is an example of symmetrical balance.


Emphasis

Emphasis (also called focal point) is where the focus is concentrated through design principles or meaning. To do this one develop points of interest to pull the viewer's eye to important parts of the body of the work. It is to make one part of an artwork dominant over the other parts. It makes an element or object in a work stand out. To use emphasis in an artwork is to attract the viewer's eyes to a place of special importance in an artwork.


Contrast

Contrast to show difference and diversity in an artwork by combining elements to create interest. Contrast is to provide an artwork with something interesting to break the repetitions.


Proportion

Proportion (sometimes called scale) describes the relative sizes and locations of objects in the artwork. It refers to the relationships of the size of objects in a body of work. Proportion gives a sense of size seen as a relationship of objects, such as smallness or largeness.


Pattern/Rhythm

Pattern and rhythm is showing consistency with colors or lines. Putting a red spiral at the bottom left and top right, for example will cause the eye to move from one spiral, to the other, and everything in between. It is indicating movement by the repetition of elements. Rhythm can make an artwork seem active.

Elements of Design

Principles of design

There are several principles of design that are as variable as are attitudes regarding modern design. They differ both between the schools of thought that influence design and between individual practicing designers. The principles of design consist of- repetition, gradation, rhythm, radiation, contrast, dominance, proportion, scale, balance, harmony and unity. Some of which overlap in design. The principles are used in all visual design fields such as graphic design, industrial design, architecture and fine art. The principles govern the relationships of the elements used and organize the composition as a whole. Successful design incorporates the use of the principles and elements to serve the designer's purpose and visual goals. There is no rule for their use, but may be directed by intent. The designer's purpose drives the decisions made to achieve appropriate scale and good proportion, as well as the degree of harmony between all the elements achieved through the sensitive balance of variety and unity. These concepts and elements drive all intentional design strategies. Awareness of the elements and principles is the first step in creating successful visual compositions.

Space

The use of space and room in a piece of art. This also includes the use of negative space.

Value

Sometimes combined with color, value describes the lightness or darkness of a color.Its also referred to as tone and can make an object look 3D.
Value is often the single most important element in paintings and drawings that allow us to see forms. In other words, it is value and the changing values in pictures that make us see not just shapes, but 3-looking implied forms.

Shape

The 2D representation of an object or idea. Line is the movement of dots. In art, it is said there is no line in nature; it's only a color difference. There are three types of lines:1. Actual line: It is form of line drawn by pen, pencil or color etc, it may be straight or curved2. Implied line: It is not a proper line but helps eye to travel along the art piece. e.g. dotted line on road3. Psychic line: This form of line has no physical value it is a psychologically created line e.g. when we are pointing something out, our eye travels from our hand to that object as if on a line.

Form

Form is the three-dimensional counterpart to shape. There are two types of form. Illusionary form is the form created through use of concepts such as perspective in order to show form on a two dimensional work, whereas real form is the form seen in sculpture and other three dimensional art.

Texture

Texture can be either real or perceived. Real texture is how a work of art actually feels, while perceived texture is how an artwork appears to feel. Sometimes tone can create texture.


Line design

Woven out of relationships of shape and outline. Dominant between decline of Roman Empire and Renaissance. May be unrealistic (Book of Hours) or realistic (Flemish Gothic). Legible element distinct from illusionist. Stereotype and non-personal symbols generally employed. Outlines emphasized by color changes. Areas filled by pattern. Popular for narrative, when features irrelevant to storytelling are omitted. Hidden geometry important. Flowing brush strokes only in illuminated MSS (unlike far-eastern art.) Development from late Roman to Byzantine and to Gothic is not based on direct observation. Symbols are distorted for religious effect. Important artists appearing at end of period include:
· Jan van Eyck. Painted direct from nature, capturing illusion of space and pattern of light and tone relationships. Worked by
§ modeling light and shade in opaque pigment (probably egg-oil emulsion)
§ covering with more or less transparent glaze, and
working over light side of forms and half shadows in thin films of opaque paint.
· Holbein. Worked by:
§ Interpreting form by contour lines of great simplicity and subtlety. Lines built of short lines infinitely sensitive to change in direction of surface planes.
§ Blending flat pattern and realistic rendering of surface quality of clothes and flesh.
Form Design
Involved the third dimension, often running in counterpoint to a line design as well. Both decorative and descriptive. Intricate and subtle patterns built up by interweaving forms in space, speeding up, slowing and stopping the recession as desired. Artist studied nature to elucidate construction of forms in space, and to relate them rhythmically. Construction uses tone or line, the latter indicating axial and sectional lineaments. Perspective helps. Artists think in the round. Significant artists:
· Cimabue and Duccio renovated the Byzantine mode.
· Giotto and Cavallini introduced form design. Giotto observed nature closely and used broad form-design to create monumental and moving tableaux-vivants.
· Masaccio dispensed with wiry outline of Giotto and used tonal gradation to place his figures in a realistic setting. Tones due to local color are repressed.
· Piero della Francesco. Further mastery of perspective — used decoratively, to lend cogency to surface pattern. Recession muted and controlled. Figures static.
· Signorelli. As Masaccio, but introduced strong, often overemphatic modeling into both lights and shadows, exaggerating the modeling in the shadows by stressing reflected light.
· Filippo Lippi and Botticelli stressed sinuous lines in slender, mobile forms.
· Pollaiuolo popularized the nude, introducing the sinewy strength found in Donatello's sculpture.
· Fra Angelico brought realistic blue skies into general use.
· Giorgione introduced atmosphere, a feeling for the weather. Aim was to give enduring satisfaction on prolonged contemplation, rather than intense but transitory emotion.
· Leonardo. Variety of interests left little time for painting. Works important for a. penetrating understanding of the construction of natural objects, b. sensitivity to rhythmic flow of forms in nature and c. subordination of color to delicate gradations of light.
· Michelangelo. Depicted vigorous, contrasted action in bulging muscles and swinging draperies. Modeling subtle, but main figure often silhouetted in strong tonal contrasts.
· Raphael. More successful than Michelangelo in architectonics of groups of figures. Supremely intelligent artist, learning from others.
· Correggio foreshadowed the Baroque. Smooth, rounded forms, suave and undulating rhythms, caressed with soft lighting all set a mood — helped by paint quality, tonality, color, stylization and choice of motive.
· Tiepolo was decorative, creating intricate interplays of line from "theater flats" and foreshortened figures.
· Poussin. Used illustration as a pretext for pictorial architecture, perfect in proportion and rhythmic articulation. Dry style, remote subjects, but he avoided heaviness by a. exaggerating luminosity and reflected light in shadows and b. playing off strong contrasts of tone against subtle ones.

Tone Design

Aimed at a. creating a satisfying pattern out of degrees of light and shade and b. representing perceptual truth more closely by some pictorial convention that represents the eye's varying sharpness of focus. Lasted early 16th to early 19th centuries. Artists were more concerned with tone than color. Where important, as in Venetian painting, color was generally used decoratively. Willingness to sacrifice detail in areas 'out of focus' meant that brushwork could vigorous and free, adding life and sparkle to the painting. Significant artists:
· Leonardo blended outlines in his Mona Lisa.
· Gentile and Giovani Bellini, using oil on canvas to avoid corrosive effect of sea air, had a good sense of paint quality which led to an appreciation of tonal values.
· Giorgione absorbed the poetic mood and love of landscapes of the Bellinis, but composed his paintings as a whole, with only such detail as was needed.
· Titian achieved a complete mastery of all expedients of tone design — slowly, intuitively, after much experimentation and fumbling. He created a new type of feminine beauty, used richer, juicier color, graded his brushstroke according to importance of what was being depicted, and used a variety of compositional means, often reducing depiction to extreme simplicity that would inspire Velasquez and Hals.
· Tintoretto used a greater range of tone and more forced lighting.
· Veronese introduced a greater realism and sumptuous, decorative color
· Caravaggio created a. stark realism and vivid characterization, b. sharp contrasts and c. mood of drama and mystery.
· Rubens. Eclectic. Supreme master of rhythmic movement. Combined realism with nobility and decoration. Great vitality and creativeness. Opulent color
· El Greco. Fluent and hallucinatory rhythms. Used colored glazes over monochrome.
· Velázquez. Consummate artist. Simplified color to produce effective tonal patterns. Always efficient painter: interprets rather than creates.
· Hals. Produced animated portraits by lively brushwork, high tonality and crisp tone patterns.
· Vermeer. Great sensitivity to light, with a strain of poetry.
· Rembrandt. Took Caravaggio's dramatic and poetic potentialities to the limit. Great sense of form. Consummate craftsman. Compassion for suffering humanity.
· Goya. Creator. Great tone designer, but often careless and hurried, using knife and dry brush.
· Van Dyck. More febrile and haughty than Rubens: more refinement and poetry but used a flat nut oil that reduced the scale, richness and atmosphere of his mentor.
· Watteau. Painted jeweled world of imagination with iridescent, atmospheric qualities that Van Dyck neglected. Graceful drawings unsurpassed for analytical clarity.
· Boucher. Artificial scenes, slightly acid color, but suavely classical and showing perfect artistic tact.
· Hogarth. Moralist whose art is securely based on Baroque tone design, with a particularly crisp handling of paint.
· Gainsborough. Natural painter. Work is play between nebulous films of paint drawn with tip of sable brush and racy passages of loaded brushwork. Thin paint has exceptional fluency of brushwork that avoids poor appearance.
· Reynolds. Excelled in use of decorative tone. Rich color His Discourses among the best of art criticism. Fresh handling of paint was an inspiration to Constable and French School, but his experimentation in materials was generally unfortunate.

Color Design

Final stage in cycle of pictorial realism. Color had always played an important part in painting but not until nineteenth century were painters prepared to make drastic sacrifices on tone and precise delineation. Harmony was the object — achieved by some relationship of warm and cold (i.e. red or blue bias) or color saturation (e.g. a brilliant orange, dark brown, warmish gray and flesh pink are all orange either neat, reduced in tonal intensity, desaturated and reduced in intensity and desaturated respectively — i.e. orange with nothing, black, gray or white added.) Form tended to be lost and dim interiors were banished for bright landscapes. Finest landscape school was the English of first half of nineteenth century — helped by Rubens' experiments, atmospheric renderings of Poussin and Claude, and rustic motifs from Dutch painters. Significant artists:

· Turner. Unrivaled knowledge of landscape under different weather conditions. Mastery of paint and poetic imagination.
· Constable. Great realism in drawing, color and tone but underpinned by old masters' techniques.
· Pre-Raphaelites. Hectic realism. Sharp, angular drawing with great precision of detail. Painted thin color over wet flake white.
· Corot. Painted broadly large areas with tones very close to one another, and then set off this subtlety with brilliant accents of dark or light crisply added.
· Courbet. Broad, impressionist handling with brush or palette knife — designed to display physicality of scene.
· Manet. Adopted Hals' approach, developing an audacious pictorial summary in tone and color of what he observed. Loose and racy brushwork to compensate for loss of more traditional techniques.
· Impressionists. Ruthlessly eliminated beauties of linear or tonal pattern to accurately interpret the colors of light.
· Seurat. Used broken color, placing spots of additive color to blend at a distance (yellow made by spots of red and green: painters had traditionally used subtractive color, the paint filtering out other wavelengths.)
· Degas. Mordantly incisive drawing. Influenced by Japanese print and photography.
· Gauguin. Use line design to enclose color-schemes that resemble gaudy plumage of parrot.
· Van Gogh. Fierce color and agitated brushstrokes to convey his perception of forces of nature.
· Cezanne. Painted direct from nature in almost mystical state. Tried to reconcile color and bulk by modeling by means of color gradations entirely, rather than by tone. Sought harmony in a logical articulation of planes.
Twentieth-Century Developments
By the beginning of the twentieth century, this fourfold evolution had run its course, leaving artists with no obvious avenue for development (nor a proper role in society). The School of Paris therefore chose experimentation, producing work with the following characteristics:
· Emphasis on the decorative at expense of representational and narrative elements.
· Reversion to line design.
· Use of fine and daring color
· Influences absorbed from Negro, child and lunatic art.
· Simplified handling of paint to point of crudity to achieve strength and intensity rather than precision or elegance.
Unfortunately, this art could often be slovenly in execution, and highly mannered, its styles not being developed to express or represent some aspect of the visible world so much as arbitrarily imposed — i.e. designed to show that the work was aggressively "modern".

Process of oil painting

Splined canvas, stapled stretched canvas and canvas boards


The Frankfurt Paradiesgärtlein, a German panel painting from circa 1410




A palette


The Cliffs at Etretat, Claude Monet, 1885

Process of oil painting

The process of oil painting varies from artist to artist, but often includes certain steps. First, the artist prepares the surface. Although surfaces like linoleum, wooden panel, paper, slate, pressed wood, and cardboard have been used, the most popular surface since the 16th century has been canvas, although many artists used panel through the 17th century and beyond. Before that it was panel, which is more expensive, heavier, less easy to transport, and prone to warp or split in poor conditions. For fine detail, however, the absolute solidity of a wooden panel gives an advantage.

The artist might sketch an outline of their subject prior to applying pigment to the surface. “Pigment” may be any number of natural substances with color, such as sulphur for yellow or cobalt for blue. The pigment is mixed with oil, usually linseed oil but other oils may be used as well. The various oils dry differently creating assorted effects.

Traditionally, an artist mixed his or her own paints for each project. Handling and mixing the raw pigments and mediums was prohibitive to transportation. This changed in the late 1800’s, when oil paint in tubes became widely available. Artists could mix colors quickly and easily without having to grind their own pigments. Also, the portability of tube paints allowed for plein air, or outdoor painting (common to French Impressionism).

The artist most often uses a brush to apply the paint. Brushes are made from a variety of fibers to create different effects. For example, brushes made with hog’s bristle might be used for bolder strokes. Brushes made from miniver, which is squirrel fur, might be used for finer details. Sizes of brushes also create different effects. For example, a "round" is a pointed brush used for detail work. "Bright" brushes are used to apply broad swaths of color. The artist might also apply paint with a palette knife, which is a flat, metal blade. A palette knife may also be used to remove paint from the canvas when necessary. A variety of unconventional tools, such as rags, sponges, and cotton swabs, may be used. Some artists even paint with their fingers.

Most artists paint in layers, a method first perfected in the Egg tempera painting technique, and adapted in Northern Europe for use with linseed oil paints. The first coat or "underpainting" is laid down first, painted normally with turpentine thinned paint. This layer helps to "tone" the canvas, and cover the white of the gesso. Many artists use this layer to sketch out the composition. This layer can be adjusted before moving forward, which is an advantage over the 'cartooning' method used in Fresco technique. After this layer dries, one way the artist might then proceed is by painting a "mosaic" of color swatches, working from darkest to lightest. The borders of the colors are blended together when the "mosaic" is completed. This layer is then left to dry before applying details. The artist may apply several layers of details, using a technique called 'fat over lean.' This means that each additional layer of paint is a bit oilier than the layer below, to allow proper drying. As a painting gets additional layers, the paint must get oilier (leaner to fatter) or the final painting will crack and peel. After it is dry, the artist will apply "glaze" to the painting, which is a thin, transparent layer to seal the surface. A classical work might take weeks or even months to layer the paint, but the most skilled early artists, such as Jan van Eyck, also used Wet-on-wet painting for some details. Artists in later periods such as the impressionist era often used this more widely, blending the wet paint on the canvas without following the Renaissance layering and glazing method. This method is also called "Alla Prima." When the image is finished and dried for up to a year, an artist would often seal the work with a layer of varnish typically made from damar gum crystals dissolved in turpentine. Contemporary artists increasingly resist the varnishing of their work, preferring that the surfaces remain varnish-free indefinitely.

Panel painting is very old; we know it was a very prestigous medium in Greece and Rome, but only very few examples of ancient panel paintings have survived. A series of 6th century BC painted tablets from Pitsa (Greece) represent the oldest surviving Greek panel paintings. The first century BC to third century AD Fayum mummy portraits, preserved in the exceptionally dry conditions of Egypt, provide the bulk of surviving panel painting from the Imperial Roman period - about 900 face or bust portraits survive. The Severan Tondo, also from Egypt (about 200AD) is one of the handful of non-funerary Graeco-Roman specimens to survive. Panel painting has always been the normal support for the Icons of Byzantine art and the later Orthodox traditions, the earliest of which (all in Saint Catherine's Monastery, Mount Sinai) date from the 5th or 6th centuries, and are the oldest panel paintings which seem to be of the highest contemporary quality. Encaustic and tempera are the two techniques used in antiquity; encaustic largely disappears after these early Byzantine icons.

In the late 12th century panel painting experienced a revival in Western Europe because of new liturgical practices—the priest and congregation were now on the same side of the altar, leaving the space behind the altar free for the display of a holy image—and thus altar decorations were in demand. The earliest forms of panel painting were dossals (altar backs), altar fronts and crucifixes. All were painted with religious images, commonly the Christ or the Virgin, with the saints appropriate to the dedication of the church, and the local town or diociese, or to the donor. The donor and members of his family are also often shown, usually kneeling to the side.

Italy in the 13th and 14th centuries was a great period of panel painting, mostly altarpieces or other religious works. However, it is estimated that of all the panel paintings produced there, 99.9 percent have been lost. The vast majority of Early Netherlandish paintings are on panel, and these include most of the earliest portraits, such as those of Jan van Eyck, and some other secular scenes. However, one of the earliest surviving oils on canvas is a French Madonna with angels of about 1410 in the Gemäldegalerie, Berlin, which is very early indeed for oil painting also.


The Frankfurt Paradiesgärtlein, a German panel painting from circa 1410.

By the 15th century with the increased wealth of Europe, and later the appearance of humanism, and a changing attitude about the function of art and patronage, panel painting went in new directions. Secular art opened the way to the creation of chests, painted beds, birth trays and other furniture. Many such works are now detached and hung framed on walls in museums. Many double-sided wings of altarpieces (see picture at top) have also been sawn into two one-sided panels.

Canvas took over from panel in Italy by the first half of the 16th century, a change led by Mantegna and the artists of Venice (which made the finest canvas at this point). In the Netherlands the change took about a century longer, and panel paintings remained common, especially in Northern Europe, even after the cheaper and more portable canvas had become the main support medium. The young Rubens and many other painters preferred it for the greater precision that could be achieved with a totally solid support, and many of his most important works also used it, even for paintings over four metres long in one dimension. His panels are of notoriously complicated construction, containing as many as seventeen pieces of wood (Het Steen, National Gallery, London). For smaller cabinet paintings, copper sheets (often old printmaking plates) were another rival support, from the end of the 16th century, used by many artists including Adam Elsheimer. Many Dutch painters of the Golden Age used panel for their small works, including Rembrandt on occasion. By the 18th century it had become unusual to paint on panel, except for small works to be inset into furniture, and the like. But, for example, The National Gallery in London has two Goya portraits on panel.

Many other painting traditions also painted, and still paint, on wood, but the term is usually only used to refer to the Western tradition described above.


Panel construction and preparation

Russian icon by Andrey Rublev, early 15th century, on a three piece panel. The raised edges are probably gesso rather than woodThe technique is known to us through Cennino Cennini's The Craftsman's Handbook (Il libro dell' arte) published in 1390, and other sources. It changed little over the centuries. It was a laborious and painstaking process:

A carpenter would construct a solid wood piece the size of the panel needed. Usually a radial cut piece was preferred (across rather than along the length of the tree; the opposite of most timber cuts), with the outer sapwood excluded. In Italy it was usually seasoned poplar, willow or linden. It would be planed and sanded and if needed, joined with other pieces to obtain the desired size and shape.
The wood would be coated with a mixture of animal-skin glues and resin and covered with linen (the mixture and linen combination was known as a "size"); this might be done by a specialist, or in the artists studio.
Once the size had dried, layer upon layer of gesso would be applied, each layer sanded down before the next applied, sometimes as many as 15 layers, before a smooth hard surface emerged, not unlike ivory. This stage was not necessarily done after the 16th century, or darker grounds were used.

Painting techniques

Landscape with rainbow 94 x 123 cm, 1636-8. A large Rubens panel painting, with a panel made out of many piecesOnce the panel construction was complete, the design was laid out, usually in charcoal.

The usual ancient painting technique was encaustic, used at Al-Fayum and in the earliest surviving Byzantine icons, which are at the Saint Catherine's Monastery, Mount Sinai. This uses heated wax as the medium for the pigments.

This was replaced before the end of first millennium by tempera, which uses an egg-yolk medium. Using small brushes dipped in a mixture of pigment and egg-yolk, the paint was applied in very small strokes. Because tempera (like encaustic) dries quickly and is not conducive to mistakes, each stroke had to be perfect each time. This exacting perfection shaped the nature and style of the art produced.

By the beginning of the 15th century, oil painting was developed. This was more tolerant, and allowed the exceptional detail of Early Netherlandish art. This used a very painstaking multi-layered technique, where the painting, or a particular part of it, had to be left for a couple of days for one layer to dry before the next was applied.


Conservation and scientific analysis

Wood panels, especially if kept with too little humidity, often warp and crack with age, and from the 19th century, when reliable techniques were developed, many have been transferred to canvas or modern board supports.

Wood panel is now rather more useful to art historians than canvas, and in recent decades there has been great progress in extracting this information - and many fakes discovered and mistaken datings corrected. Specialists can identify the tree species used, which varied according to the area where the painting was made. Carbon-dating techniques can give an approximate date-range (typically to about a range of about 20 years), and dendrochronology sequences have been developed for the main source areas of timber for panels. Italian paintings used local or sometimes Dalmatian wood, most often poplar, but including chestnut, walnut, oak and other woods. The Netherlands ran short of local timber early in the 15th century, and most Early Netherlandish masterpieces are Baltic oak, often Polish, cut north of Warsaw and shipped down the Vistula, across the Baltic to the Netherlands.[1] Southern German painters often used pine, and mahogany imported into Europe was used by later painters, including examples by Rembrandt and Goya.

In theory dendro-chronology gives an exact felling date, but in practice allowances have to be made for a seasoning period of several years, and a small panel may be from the centre of the tree, with no way of knowing how many rings outside the panel there were. So dendro-chronological conclusions tend to be expressed as a "terminus post quem" or an earliest possible date, with a tentative estimate of an actual date, that may be twenty or more years later.

Canvas
Etymology

The word canvas is derived from the Latin word for cannabis -- hemp was popularly used to make canvas.

The online etymology dictionary shows a more expanded etymology [1]:

1260, from Anglo-Fr. canevaz, from O.Fr. canevas, from V.L. *cannapaceus "made of hemp," from L. cannabis, from Gk. kannabis "hemp," a Scythian or Thracian word. PGT


Physical characteristics

Modern canvas is usually made of cotton. It differs from other heavy cotton fabrics, such as denim, in being plain weave rather than twill weave. Canvas comes in two basic types: plain and duck. The threads in duck canvas are more tightly woven. In the USA, canvas is graded two ways: by weight (ounces per square yard) and by number. The numbers run in reverse of the weight; so, number 10 canvas is lighter than number 4.


Canvas for painting

Canvas has become the most common support medium for oil painting, replacing wooden panels. One of the earliest surviving oils on canvas is a French Madonna with angels of about 1410 in the Gemäldegalerie, Berlin, which is very early indeed for oil painting also. However panel remained much more common until the 16th century in Italy and the 17th century in Northern Europe. Mantegna and Venetian artists were among those leading the change; Venetian sail canvas was readily available and regarded as the best quality.

Canvas is usually stretched across a wooden frame called a stretcher, and may be coated with gesso before it is to be used; this is to prevent oil paint from coming into direct contact with the canvas fibers, which will eventually cause the canvas to decay. A traditional and flexible chalk gesso is composed of lead carbonate and linseed oil, applied over a rabbit skin glue ground; a variation using titanium white pigment and calcium carbonate is rather brittle and susceptible to cracking. (Of course lead-based paint is also poisonous so care has to be taken in using it.) Various alternative and more flexible canvas primers are commercially available, the most popular being a synthetic latex paint composed of titanium dioxide and calcium carbonate, bound with a thermo-plastic emulsion. Notwithstanding the concern for deterioration of materials, many modern artists, such as Jackson Pollock, Kenneth Noland, Francis Bacon, Helen Frankenthaler, Dan Christensen, Larry Zox, Ronnie Landfield, Color Field painters, Lyrical Abstractionists, and others sometimes paint onto the unprimed, or "raw canvas".

Early canvas was made of linen, a sturdy brownish fabric of considerable strength. Linen is particularly suitable for the use of oil paint. In the early 20th century, cotton canvas, often referred to as "cotton duck", came into use. Linen is composed of higher quality material, and remains popular with many professional artists, especially those who work with oil paint. Cotton duck, which stretches more fully and has an even, mechanical weave, offers a more economical alternative. The advent of acrylic paint has greatly increased the popularity and use of cotton duck canvas. Linen and cotton derive from two entirely different plants, the flax plant and the cotton plant.

One can also buy small, prepared canvases which are glued to a cardboard backing in the factory, called "canvas board". However, these are only available in certain sizes, and are not acid-free, so their lifespan is extremely limited. They are usually used for quick studies. Gessoed canvases on stretchers are also available. These pre-stretched, pre-primed canvases are suitable for all but the most exacting professional standards. They are available in a variety of weights: light-weight is about 4 oz. or 5 oz.; medium-weight is about 7 oz. or 8 oz.; heavy-weight is about 10 oz. or 12 oz. They are prepared with two or three coats of gesso and are ready for use right out of the package. Artists desiring greater control of their painting surface often add a coat or two of their preferred gesso. Professional artists who wish to work on canvas may prepare their own canvas in the traditional manner.

One of the most outstanding differences between modern painting techniques and those of the Flemish and Dutch Masters is in the preparation of the canvas. "Modern" techniques take advantage of both the canvas texture as well as those of the paint itself. A novice artist often finds it nearly impossible to approach the realism of such classic art, despite skill in applying the paint. In fact, Renaissance masters took extreme measures to ensure that none of the texture of the canvas came through. This required a painstaking, months-long process of layering the raw canvas with (usually) lead-white paint, then polishing the surface, and then repeating. The final product had little resemblance to fabric, but instead had a glossy, enamel-like finish. Though this may seem an extreme measure to the modern painter, it is crucial if photographic realism is the end goal.

With a properly prepared canvas, the painter will find that each subsequent layer of color glides on in a "buttery" manner, and that with the proper consistency of application (fat over lean technique), a painting entirely devoid of brushstrokes can be readily achieved.

To un-wrinkle the material, use a warm iron (not a hot iron) over a piece of wet cotton to flatten the wrinkles, although hot water on the back works just as well.

Canvas can also be printed on digitally to create canvas prints. After printing, the canvas can be wrapped around a stretcher and displayed.


Splined canvas, stapled stretched canvas and canvas boards

Splined canvasSplined canvases offer advantages that the traditional side-stapled canvas does not. The most obvious is that the edges of the stretched canvas are staple-free. This allows the painter to incorporate painted edges into the artwork itself. It also allows the artwork to be displayed without a frame. Splined canvas is easier to restretch. It's far easier to remove from the stretcher bars (just pull the spline out) and is easier to attach to another support since there is more fabric at the back to work with. Additionally, there are no unsightly staple holes to deal with.

Stapled canvases stay stretched tighter over a longer period of time, but are more difficult to re-stretch when the need arises.

Canvas boards are made of cardboard with canvas stretched over and sealed on the backside. The canvas is typically linen primed for a certain type of paint.


Non-traditional uses for stretched canvas
It has become popular to use the myriad of stretched canvas's sizes and shapes for unconventional creative expression. Artists create miniature works on business card sized stretched canvas and use them as trading cards to make connections with other artists. Many artists use canvas for altered art pieces as well as for scrapbook pages—because stretched canvas is available in many sizes, from miniatures to wall size, it is used for decoupage and needlework projects, made into lamps, or painted simply for home decor.