The Type of gypsum: Distinctive processing techniques can yield gypsum items with various properties, generating them appropriate for unique purposes. Gypsum uses involve: manufacture of wallboard, cement, plaster of Paris, soil conditioning, a hardening retarder in portland cement. Varieties of gypsum often called "satin spar" and "alabaster" are employed for https://www.propanraya.com/id/produk/eco-gypsum-ee-4050