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What is ASTM?
ASTM International is a global organization that develops and publishes technical standards for an expansive array of products, materials,
systems and services. Today, more than 12,800 ASTM standards are in use around the world, including ASTM F2100-11, the standard
for medical face masks since 2012.

Tell me more about how masks are tested
The five performance metrics and their related tests are:
Bacterial Filtration Efficiency (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 Efficiency (PFE) - Test ASTM F2299
This test measures the percentage of particles larger than 0.1µm (0.1 micron) filtered out by the mask. The challenge material used
consists of latex aerosol concentrations in a controlled airflow chamber.

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 velocity (80
mmHg, 120 mmHg, or 160 mmHg). The mask either passes or fails based on visual evidence of synthetic blood penetration.

Breathability - Test ASTM F2100 C: ?P
This test determines the face mask’s resistance to airflow. A controlled flow of air is driven through the face 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.

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.

ASTM F2100-11: Standard Specification for Performance of Materials Used in Medical Face Masks and
the performance of BioMask 3-Layer Protective Mask (Lot. No. BM202007CY1)
Fluid Resistance -
Test ASTM F1862
Particulate Filtration Efficiency (PFE) - Test ASTM F2299
Breathability -
Test ASTM F2100 C: ?P
Flammability -
Test 16 CFR Part 1610: Flame Spread
Bacterial Filtration Efficiency (BFE) - Test ASTM F2101