In the process of interior decoration，Gypsum powder plays a very important role，Its main component is hydrated calcium sulfate，Most of them are white, transparent crystals，Because there is no crystal water divided into "soft gypsum" and "anhydrite"，Mainly used for building walls，勾缝，Wall leveling，There is also a colored plaster powder that can be used for decoration，Relatively low cost，Gypsum powder can be used as the main raw material of concrete expansion agent, anti-crack agent and self-leveling mortar，It is used as compound mineralizer in the production of special cement。The role of caulking gypsum is to fill cracks and smooth grooves, and the role of gypsum powder + white latex is used for leveling the serious sand and gray wall, both of which can not be directly used as the base of latex paint。Latex paint base treatment requires a batch of scraping putty, can use finished putty powder。