A plaster cast mould is a negative impression of an object made from plaster, which can be used to create positive copies of the object. Plaster cast moulds are commonly used in art and design to create sculptures, decorative objects, and architectural elements. They can also be used in industry to make moulds for casting metal, plastic, and other materials.
Plaster cast moulds are made by applying a layer of plaster to the surface of the object being moulded. The plaster is then allowed to set, and the object is removed from the mould. The resulting mould can then be used to create multiple copies of the object by pouring molten material into the mould and allowing it to cool and solidify.