Drybrush

Drybrush is a painting technique in which a paint brush that is relatively dry, but still holds paint, is used. Load is applied to a dry support such as paper or primed canvas. The resulting brush strokes have a characteristic scratchy look that lacks the smooth appearance that washes or blended paint commonly have.
The drybrush technique can be achieved with both water-based and oil-based media. With water-based media such as inks, acrylic paints, tempera paints or watercolor paints, the brush should be dry or squeezed dry of all water. The brush should then be loaded with paint that is highly viscous or thick. The loaded brush should then be applied to a dry support. With other water-based media, the brush should be loaded with paint then squeezed dry.
With oil-based media, such as oil paint, a similar technique may be used, although instead of water, the brush should be dry or squeezed dry of oil and solvent. Because oil paint has a longer drying time than water-based media, brushing over or blending drybrush strokes should be avoided to preserve the distinctive look of the drybrush technique.
The technique is frequently used in model painting to apply highlights to miniatures.
Oil-based drybrushing can also be scrubbed onto paper, canvas or absorbent gesso with stiff bristle brushes to impart smooth airbrushed or pastel-style effects. Next is that drybrush is sometimes mixed with other painting techniques
Coming from the dry brush technique, an autonomous painting technique developed in a comparatively short time:
For painting with the dry brush a small amount of oil is used. The color is diluted with a few drops of linseed oil. From this mixture very little color is added to the brush. In the next step the brush with the color on it is spread out very well on a color palette and the oil is secreted. The brush must be dry at the end of this step.
Linseed oil, when used with oil paint for dry brushing, will yellow if it becomes too warm, such as being left in a car in the summer sun. Sewing machine oil and diesel oil work just as well and do not yellow.
Now a very thin layer of color is applied to a watercolor paper. By reworking with an eraser at this point it is possible to incorporate different lighting effects and details.
Images painted with a dry brush are characterized by the specific transitions of light and shadow and gossamer tones. A work done in black and white appears similar to a coal or fine pencil drawing.