Step 4: Dewax/Burnout

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Before pouring metal into the mold, the wax is removed. This is typically done using a steam dewax autoclave, which is like a large, industrial pressure cooker. 

Another method is the use of a flash fire oven, which melts and burns off the wax. Many foundries use both methods in concert. Autoclave removes the majority of the wax, which can be reconditioned and reused. Flash fire burns off residual wax and cures the shell, readying it for casting.

​Next... Step 5: Metal Pouring

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