Fluorescence: Fluorescence May be the assets of the mineral to emit obvious gentle when subjected to ultraviolet radiation. Gypsum isn't going to fluoresce underneath UV light-weight. Hair or fibre and lime or clay may be additional to plasters through manufacture. The plaster coats, except for some complete coats, are sanded. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050