How Do You Make Molds Out Of Plaster?
Learning to make molds out of plaster is a great introduction to the art of casting, a common method for making sculptures and a variety of commercial products. This plaster mold can be used for casting or molding wax, paper, or latex. Depending on your process, the mold may be broken after casting, or saved to use again. Carve an original object that you want to make a mold of, out of plasticine or clay. The model should have a limited number of small parts and sharp angles–the closer to a solid block or sphere it is, the easier it will be to make a mold out of plaster. Figure out where the mold will need to be divided in order to come off the cast object. For example, the mold of a sphere should be divided in half so that one piece can pull off of each side. Objects with parts pointing in various directions need to be divided into more sections. Make a thin sheet of clay and attach it around the model wherever the mold must be separated. For example, an approximate sphere should hav
