Mask Protection Standards & Medical Face Mask Information ...
The current standard ASTM F2100-11 (2011) specifies the performance requirements for Medical Face Masks with five basic criteria: 1. BFE (Bacterial Filtration Efficiency): BFE measures how well the medical face mask filters out bacteria when challenged with a bacteria-containing aerosol. ASTM specifies testing with a droplet size of 3.0 microns ...