These are 1/8 inch thick sheets of perforated thermoplastic material that are 18" by 24". Protoplast is a hand formable thermoplastic, often used to make masks, theatre props, or mother molds. When heated to 160 - 180 degrees, the Protoplast will soften and become formable. Protoplast can be heated by submersing in hot water or by using a heat gun. Great for those heavy duty jobs where you need something a little stiffer.
More Prop 65 Info
More Prop 65 Info