Recovered system fines (approximately 10%) are used in the foundry's molding plaster
mix, representing a double cost saving because disposal costs are eliminated and fine sand purchases made unnecessary.
Materials: Clay, small natural objects (shells, seed pods, insect husks), molding plaster
or Plaster of Paris (approximately 3-5 lbs.), container for casting (small cans such as tuna or small portion cans), small kiln, pewter in grain form for casting (small objects will take an ounce each), ladle,tongs, gloves and hot pads, wax and a candle for softening it.