Decalcomania - a type of art technique that is the application of gouache to a surface of a material like metal, glass, and canvas. It is a decorative technique by which engravings and prints may be transferred to pottery or other materials. A shortened version of the term is used for a mass-produced commodity art transfer or product label, known as a "decal". It is a technique used by some surrealist artists which involves pressing paint between sheets of paper.