Functional component: α-hemihydrate gypsum; standard JC/T 2038; appearance powder; net weight 50 kg. With strength more than three times that of building gypsum, α-hemihydrate gypsum offers good mechanical, working, environmental and biological performance. It not only replaces conventional building gypsum to enhance product performance but also serves wider applications such as precision casting, high-end building materials, arts and crafts, medical care, aviation and shipbuilding.