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Can the bottom of the sand molds withstand exposure to the molten bath without scabbing or spalling into the bath?

April 26, 2017bath exposure Molds molten Sand scabbing spalling withstand

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Can the bottom of the sand molds withstand exposure to the molten bath without scabbing or spalling into the bath?

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Absolutely! Spalling is caused by radiant heat WITHOUT molten metal contact. Sand floats, and the molds float and slide more easily. Filter cloth holds the sand in place. Use western bentonite.