Calcination: The Powdered gypsum is heated to eliminate drinking water molecules, making different sorts of plaster dependant upon the temperature and period of heating. Gypsum for soil cures this problem by breaking down compacted soil to allow great drainage and nutrient absorption, vital in plant growth.  When gypsum is heated, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050