Scratchboard technique is a two-dimensional subtractive process. It involves the use of abrasive tools to directly remove a surface layer of one value (typically dark) to expose a second layer (typically white). The values within the artwork are predominantly achieved by varying the amount of surface layer that has been scratched away or left. The texture and form of all key compositional elements within the artwork must be created by subtractive removal, not exclusively by the addition of paint or ink. Works may be color or black and white.
