This standard specifies the terms and definitions, classification, technical requirements, test methods, inspection rules and marking, Encasement, transportation and storage requirements of medical Encasement base paper. It is applicable to paper materials used in medical Encasement, including paper used in the production of medical Encasement bags, parcels and containers. The standard emphasizes the requirements of medical Encasement base paper in terms of hygiene safety, strength, water resistance and tear resistance to ensure its Reliability and effectiveness in use. At the same time, the standard also provides relevant test methods and inspection rules to ensure that the paper mass meets the needs of medical Encasement.