Calcination: The Powdered gypsum is heated to remove h2o molecules, producing diverse sorts of plaster based on the temperature and period of heating. Hydration of Anhydrite: Gypsum can also sort in the hydration of anhydrite (CaSO₄). Anhydrite is usually a calcium sulfate mineral that lacks the h2o molecules existing in https://www.propanraya.com/id/produk/eco-gypsum-ee-4050