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Plaster Slabs for Reclaiming Clay : r/Pottery

A general purpose plaster suitable for architectural, art, and support shell (mother mold) applications. Often referred to as Plaster of Paris or

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Ultra Cal 30 and White Hydrocal (Gypsum Cement) 50 lbs.

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Gypsum Additives - The Compleat Sculptor

Moulding Plaster - The Compleat Sculptor