Sgraffito

Sgraffito (Italian: [zɡrafˈfiːto]; plural: sgraffiti; sometimes spelled scraffito) is 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 reveal parts of the underlying layer.