GB/T 5483-2008 "Natural plaster" standard specifies the definition of terms, classification grade, mass requirements, test methods, inspection rules and marking, Encasement, transportation and storage requirements for natural plaster products. This standard applies to natural plaster mineral products produced in nature. Normative reference documents include bulk mineral product sampling and plaster chemical analysis methods, etc., emphasizing accuracy and conformity. Term definitions cover the basic concepts of plaster, such as grade, attached water, crystalline water and chemical composition of plaster. The implementation of the standard helps to ensure the mass and application effect of natural plaster products.