Rubber, platinum-cured silicone, and 14-Series Poly-Optic Resin castings. Most materials, especially resins, foams and some low-melt metals. Shrinks on cure (~1%), shorter library life (2-5 yrs.) than platinum-cured systems. No cure inhibition, slightly less expensive than platinum-cured systems Liquid rubber can suffer from cure inhibition by some materials (e.g., sulfurĬlay, tin silicones, Bondo, some 3D-printed plastics, latex rubber). No shrink on cure, cured rubber has long storage life Options are in the table below: Rubber Type Polytek silicone falls into two general categories: platinum-cured and tin-cured. Residual release agent can prevent paint from sticking to Release agent can be difficult to apply in intricate areasĪnd it may be difficult to remove from the casting.
Release agent when casting polyurethane resin. Original sculpture and subsequent castings.įor this particular project, we also know that we want to use a silicone mold rubber because it does not require This step would most likely deformīased on the shape of the sculpture, we also know that the mold will require a cut in order to remove the Of the original model ( review a poured blanket mold tutorial here). Poured Blanket Mold: One of the steps in the poured blanket mold process is to form a layer of clay on top Also, brush-on molds tend to have thick and thin spots – thin spots end up being weak points in Here are the reasons that we are eliminating other methods:īrush-on Mold: We are concerned that air bubbles may form in the intricate details on the base of Step 1: Select a Mold Making Method & Mold Rubberįor this sculpture, we select the “poured block mold” method. Step 3: Measure, Mix & Pour Silicone Mold Step 1: Select a Mold Making Method & Mold
This article details the steps that we took throughout the mold making and casting process: The detailed sculpture is pictured below from different Reproduce it in plastic on a rotational casting machine. Gardens brought his clay sculpture to our facility to make a mold of the figure and then