Slurry/Shell

The sprued wax copy & cup are then dipped in several layers of a liquid "slurry" mixture and sand to encase the wax, which then dries and hardens. This ensures that the wax pattern & sprues are fortified by an outer ceramic shell that becomes the final mold after the shell is fired and the wax has melted out.

Shell Burn-Out or "Flashing"

The flashing/burn-out stage eliminates all wax and moisture from the ceramic shell. The shells are placed into the furnace and heated to a point where the wax is melted away, leaving a hollow ceramic shell that is ready to accept the molten bronze. The shells are now ready for casting!