This standard specifies the terms and definitions, classification and marking, general requirements, technical requirements, test methods, inspection rules and signage, Encasement, transportation and storage of interior building decoration materials with moisture control function. It applies to interior building decoration materials and their products that can automatically adjust the relative humidity of indoor air by absorbing and releasing water vapor by themselves. According to the thickness, these materials are divided into three categories: those with a thickness of less than 1 mm are Class I, those with a thickness of 1 mm to 3 mm are Class II, and those with a thickness greater than 3 mm are Class III. The code name of these materials is "HC".