The term 'Plaster' usually refers to Plaster of Paris (also called gesso). A mixture of powdered and heat-treated gypsum, which can be mixed with water (about 2 parts plaster to each part of water), hardening to a smooth solid which does not shrink or lose volume because it hardens before all the water can evaporate. We manufacture Plaster of Paris which is common building material as well as a versatile medium in sculpture, can be either the material cast in a mold or the material of a mold, a material to be modeled, or carved, or attached to something else.