How Do You Make A Cheap Fiberglass Mold For Plaster?
Although fiberglass is most often used as a casting material, it can also be used to make molds. Fiberglass molds are best for complex projects that may need to be cast over and over, as fiberglass holds up well over time. The materials are also relatively cheap, compared with other molding materials. To make a two-part fiberglass mold suitable for casting in plaster, complete the following instructions. Find a template object that you wish to make copies from. You can also make your own template from foam or balsa and finish the outside so that it is smooth. Determine the midline of the object, from one side of the base to the other, and build up a wall of modeling clay or place a parting board with modeling clay there, so that you can keep the mold halves separate. Make sure that you have as smooth and small of a seam as possible. Apply several layers of wax mold release to the entire object, buffing the wax so that it is as smooth and bubble-free as possible. On top of the wax mold
