No. 1 Pottery Plaster sold in 1 pound increments. . . No. 1 Pottery Plaster is the industry standard for making slip casting molds
Pottery Plaster #1
USG #1 Pottery Plaster 50 Pounds – Evans Ceramic Supply
Pottery Plaster #1 - The Ceramic Shop
Peter Karner - Lidded Bowl • pka108 — In Tandem Gallery - Bakersville NC
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Perfect Plaster 4lb Pottery & Ceramic Casting Material
U.S. Gypsum POTTERY PLASTER 50lb Bag
US Gypsum Plaster
Usg #1 Pottery Plaster
Krueger Pottery Supply