Re: I'm looking for homebrew mold wash recipes.


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Posted by Mike on January 28, 19100 at 04:02:21:

In Reply to: I'm looking for homebrew mold wash recipes. posted by Rob Frink on April 24, 1999 at 20:53:21:

I have been sand casting brass in molds coated with a mixture of 3 oz. graphite, 1 oz. talc (talcum powder) and enough 3 lb. shellac to form a thin paste which is thinned with denatured alcohol to a thin paint-like body for spraying. Spray onto the mold cavity, burn off the alcohol & set the coating with a gentle torch flame applied carefully. My sand was rather coarse so I had to give it 3 coats, but it greatly improved the casting finish.

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