OSAT Art (102)

Drawing is the foundation of visual art, serving as both a primary medium and a preparatory step for other art forms. Understanding drawing tools and techniques is essential for art educators.

Graphite pencils are graded on a scale from 9H (hardest) to 9B (softest), with HB representing the middle range. Hard pencils produce light, precise lines suitable for technical drawing and fine detail work. Soft pencils create darker, richer marks ideal for expressive drawing and shading. The hardness affects not only value but also the texture of marks, with softer grades producing grainier textures.

Pencil techniques include hatching, which uses parallel lines to create value; cross-hatching, which layers intersecting lines for deeper tones; stippling, which employs dots of varying density; and blending, which smooths graphite with tools or fingers. Contour drawing focuses on edges and outlines, while gesture drawing captures movement and form through quick, expressive marks.

Charcoal comes in three primary forms: vine charcoal, compressed charcoal, and charcoal pencils. Vine charcoal is made from burned willow or grape vines, producing soft, easily erasable marks ideal for preliminary sketches. Compressed charcoal combines powdered charcoal with a binder, creating denser, darker marks that are more permanent. Charcoal pencils offer greater control and cleaner handling.

Charcoal excels at creating dramatic value ranges and atmospheric effects. Subtractive drawing with charcoal involves covering a surface with charcoal, then erasing to create highlights. Charcoal can be blended with chamois, tortillons, or fingers, and fixed with spray fixative to prevent smudging.

Colored pencils contain pigment suspended in a wax or oil-based binder. Wax-based pencils are common and affordable but can produce wax bloom, a hazy film that develops over time. Oil-based pencils resist bloom and layer more smoothly. Watercolor pencils contain water-soluble binders, allowing artists to blend with water.

Layering techniques build color intensity and create optical color mixing. Burnishing uses heavy pressure with a light color or colorless blender to create smooth, saturated surfaces. Sgraffito scratches through layers to reveal colors beneath. Solvent blending uses colorless markers or mineral spirits to dissolve and blend pigment.

Ink drawing tools include dip pens with interchangeable nibs, technical pens with consistent line widths, brush pens, and felt-tip markers. India ink is permanent and waterproof when dry, while other inks may be water-soluble or fugitive.

Ink techniques parallel those used in graphite but require greater planning since ink marks are permanent. Wash techniques dilute ink with water to create value gradations. Wet-on-wet application creates soft, blurred edges, while wet-on-dry produces crisp lines. Cross-contour lines follow surface forms to suggest three-dimensionality.

Pastels are pure pigment bound with minimal gum or resin. Soft pastels have high pigment concentration and produce vibrant, velvety surfaces. Hard pastels contain more binder, allowing finer detail and cleaner edges. Oil pastels use an oil-based binder, creating waxy, resistant marks that blend differently than soft pastels. Pastel pencils offer precision for detailed work.

Pastel techniques include layering, blending with fingers or tools, feathering, and scumbling. Working on toned or textured surfaces enhances pastel adhesion and visual impact. Fixative can preserve pastel drawings but may darken values and reduce vibrancy.

Conte crayons are compressed sticks of pigment, clay, and graphite, traditionally available in black, white, sanguine, and sepia. They produce marks between charcoal and pencil in character. Lithographic crayons contain grease for printmaking applications. China markers and grease pencils work on smooth surfaces like glass and plastic.

Drawing surfaces significantly affect results. Tooth refers to surface texture, with rough papers gripping dry media and smooth papers suiting pen work. Weight indicates paper thickness, measured in pounds or grams per square meter. Hot-press papers have smooth surfaces; cold-press papers are textured. Toned papers provide middle values, allowing artists to work toward lights and darks. Bristol board offers smooth, durable surfaces for detailed work. Newsprint is economical for practice and gesture drawing.