Calcination: The Powdered gypsum is heated to get rid of water molecules, producing distinct types of plaster dependant upon the temperature and length of heating. Hydration of Anhydrite: Gypsum may variety in the hydration of anhydrite (CaSO₄). Anhydrite is actually a calcium sulfate mineral that lacks the h2o molecules existing https://www.propanraya.com/id/produk/eco-gypsum-ee-4050