Calcination: The powdered gypsum is heated to remove water molecules, developing various varieties of plaster dependant upon the temperature and length of heating. Hydration of Anhydrite: Gypsum could also form from the hydration of anhydrite (CaSO₄). Anhydrite is a calcium sulfate mineral that lacks the drinking water molecules current in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050