Polymethylmethacrylate moulding of objects, e.g. busts or effigies

摘要

Moulding an object, e.g. a bust or effigy by making a tough flexible mould of silicone elastomer; pouring in a curable polymethyl methacrylate; after curing demoulding object that presents at least one translucent, unpolished (2) face obtained by contact with the mould wall by the curable material. An inhibitor to limit shrinkage is added to the resin which is cured at 150-180 deg C. Pouring is done under vacuum. The silicone has a catalyst added to give it a rubber state.