How Do You Make A Mold For Fiberglass?
Fiberglass, although a fairly toxic substance, is a common choice among professionals, students and hobbyists for creating props and other art projects. In order to form fiberglass into the desired shape, it must be pressed into a mold, or negative impression of a sculpture. The best molds for casting in fiberglass are made from plaster. They are usually made in the two-part style, since fiberglass dries too hard to peel out of an enclosed mold. Sculpt your original design or model object from water-based clay. Coat the entire sculpture with a clear sealer, such as Krylon Crystal Clear, and let it dry completely. Visualize dividing the sculpture in half, creating two identical sides. Along this dividing line, build a thin wall of modeling clay that is a few inches tall. Mix together a small batch of plaster. Add gypsum and water to your bucket until you have a soupy texture. Stir the mixture to remove air bubbles. Paint an impression coat on one side of the sculpture, all the way up to
