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Dewax & Preheat oven

The wax inside the ceramic mold is melted out utilizing steam in an industrial autoclave and the wax is recycled. After wax is removed, a ceramic mold is then heated to 1800 degrees Fahrenheit in a preheat oven. The heating of the mold fuses the ceramic particles so the mold can withstand the pressure and temperature of the upcoming molten metal. It also removes all traces of organic materials. The preheating of the shell improves the ability to cast fine detail and improves the feed of liquid metal to compensate for volumetric shrinkage.

". . . preheating the shell improves the ability to cast fine detail and the feed of liquid metal to compensate for volumetric shrinkage . . ."