Scratchboard

art technique of scratchboard- both a medium, and an illustrative technique using sharp knives and tools for etching into a thin layer of white China clay that is coated with black India ink

sgraffito-a technique either of wall decor, produced by applying layers of plaster tinted in contrasting colours to a moistened surface, or in ceramics, by applying to an unfired ceramic body two successive layers of contrasting slip, and then in either case scratching so as to produce an outline drawing.

Both types of art use "scratching" to male the final piece.

                               
                                 EXAMPLES