This standard details product labeling, requirements, test methods, inspection rules, and labeling, Encasement, transportation, and storage requirements for microporous filter membranes. It applies to microporous filter membranes made of polymer-based materials by casting. The standards cited include batch-by-batch inspection count sampling procedures, sampling inspection procedures for non-conforming product rates, and hygiene standards for polyethylene (PE) and polypropylene (PP) molded products for food Encasement. The terms membrane pore size, bubble point pressure, and flux are defined. Product labeling includes elements such as the material of manufacture and the presence or absence of a support.