In painting it is a technique in which a paint brush that is very wet with solvent and holds a small load of paint or ink is applied to a wet or dry support such as paper or primed or raw canvas. The result is a smooth and uniform area that ideally lacks the appearance of brush strokes and is semi-transparent.
A wash is accomplished by using a large amount of solvent with little paint. Paint consists of a pigment and binder which allows the pigment to adhere to its support. Solvents dilute the binder, thus diluting the binding strength of the paint. Washes can be brittle and fragile paint films because of this. However, when gum arabic watercolor washes are applied to a highly absorbent surface, such as paper, the effects are long lasting.
wash通常由大量的溶剂和少量的染料组成。对被涂物体的效果是得到一层均匀光滑且没有什么毛刷痕迹的半透明的表面。