Alja-Safe Lifecasting Alginate 3-lb Box - Plaster Casting Kit Dimensions: 9.8' 11.6' 8.0' World’s first alginate that does not contain crystalline silica (a known carcinogen). Perfect for making single-use molds of the face, hands and other body parts Captures detail better than other alginates, giving you a more accurate reproduction of your original Cast plaster, Matrix NEO (polymer modified gypsum) or Smooth-Cast 300Q ultra-fast urethane resin into the mold to make a reproduction Easy Mix Ratio: 1 Part Warm Water (80° F / 27° C) to 1 Part Alja-Safe Powder By Volume