Gypsum Is actually a comfortable sulfate mineral made up of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O.[4] It really is greatly mined and it is employed to be a fertilizer and as the principal constituent in lots of forms of plaster, drywall and blackboard or sidewalk chalk. Wall Coating: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050