Sgraffito is a decorative technique used in pottery and wall art, where a surface layer is scratched away to reveal a contrasting color underneath. This method often involves applying a slip, which is a liquid mixture of clay and water, over a base layer of clay. Artists then use tools to carve designs into the slip, creating intricate patterns and images. The technique has roots in ancient cultures, including Ancient Greece and Italy, and is still popular among contemporary artisans. Sgraffito can be found in various forms, from ceramics to frescoes, showcasing the versatility and creativity of this artistic approach.