Fluid Resistance: Test ASTM F1862 This test evaluates the resistance of a medical face mask to penetration by a small volume (~2 mL) of synthetic blood at a high speed (80 mmHg, 120 mmHg, or 160 mmHg). The mask either passes or fails based on visual evidence of synthetic blood penetration.
Breathability: Test MIL-M-36954 C: ΔP This test determines the face mask’s resistance to airflow. A controlled flow of air is driven through the mask, and the pressure before and after is measured. The difference in pressure is divided by the surface (in cm2) of the sample. A lower breathing resistance indicates a better comfort level for the user.
Bacterial Filtration: (BFE) Test ASTM F2101 This test measures the percentage of bacteria larger than 3 microns filtered out by the mask. The challenge material used is Staphylococcus aureus.
Particulate Filtration: PFE – Test ASTM F2299 This test measures the percentage of particles larger than 1 micron filtered out by the mask. The challenge material used consists of latex aerosol concentrations in a controlled airflow chamber.
Flammability – Test 16 CFR Part 1610: Flame Spread This test exposes the face mask material to a flame and measures the time required for the flame to proceed up the material a distance of 127 mm (5 inches). Class 1 means the material exhibits normal flammability and is acceptable for use in clothing.
