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Soft mold mix suited to the high temperature of pate de verre and glass casting. Fine grit holds detail. Breaks up easily from finished project. Kiln wash not required. Use with Alginate #80901 for casting. 5 lb. box.
Add 1 part, by volume, hydroperm to 1 part warm water, stir and pour like plaster. Let the mold sit 30 minutes then remove. Fire the mold at 300 degrees fahrenheit for 4 hours or more in a vented kiln to remove any internal moisture.
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