Medical face mask material performance is based on testing for bacterial filtration efficiency, differential pressure, sub-micron particulate filtration efficiency, resistance to penetration by synthetic blood, and flammability. ASTM F2100-This specification covers the classifications, performance requirements, and test methods for the materials used in the construction of medical face masks that are used in health care services such as surgery and patient care. The Test instruments for conforming to this test standard include as following: Bacterial filtration efficiency tester : quickly and accurately measure the filtration efficiency of filtration protection equipment and materials . Differential pressure Tester : used for the determination of gas ex...