Calcination: The Powdered gypsum is heated to eliminate drinking water molecules, generating distinctive kinds of plaster with regards to the temperature and duration of heating. Hydration of Anhydrite: Gypsum could also kind throughout the hydration of anhydrite (CaSO₄). Anhydrite is really a calcium sulfate mineral that lacks the drinking water https://www.propanraya.com/id/produk/eco-gypsum-ee-4050