a. Composition: medical dialyzed paper + medical composite membrane (blue, white, green, etc.).b. Characteristics:1. The articles in valve bag can be clearly observed.2. It is convenient and efficient to seal. After the release paper on the surface double sides adhesive tape in the front end of valve bag is ripped out, the mucilage glue part will be exposed, then you can seal the bag correctly and accomplish sealing.3. It can be printed with sterilization color change indicators so as to achieve the clear sterilization status.4. It is suitable for EO disinfection and high-temperature steam disinfection.c. It is applicable to: the hospital and clinical disinfection packaging, disinfection packaging of beauty supplies before use, disinfection packaging of lab supplies, and household high-temperature disinfection packaging.