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How do a repair a large chip in my bottle slumping mold. I put a piece of what I thought was copper foil under a bottle and that part stuck to mold. When I at last got it out a large chunk of mold was on the bottle.. Thanks
Several ways to do repairs.
Make a paste of kiln wash and push it into the divot. lightly sand to smooth. It will have to be re-done periodically.
Make a paste of cement fondu, smooth it while wet, because it gets hard when cured. Cure by firing in kinl to about 720C
Make a paste of cement fondu and vermiculite. Treat it the same way as cement fondu on its own. This combination holds less heat than cement fondu on its own.
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