Bacterial filtration efficiency: ≥95%
Differential pressure, Pa/cm2 (Breathability): <40
Microbial cleanliness (cfu/g): ≤30
Cleanroom: ISO Class 8 無塵車間NEBB
Particulate filtration efficiency: ≥95%
Many customers ask why Dr. Mask follows the testing standards of EN 14683, and not ASTM. Both tests have their pros and cons. ASTM includes PFE in its test, but EN 14683 does not require PFE. However, ASTM does not require Microbial Cleanliness test, but EN 14683 requires it. To ensure that Dr. Mask covers the best of both worlds, we send our masks to Hong Kong Standards and Testing Centre to perform two tests.
One is EN 14683 and another one is PFE test. With this arrangement, we cover BFE, PFE, Differential Pressure, and Microbial Cleanliness. Their similarities and differences are illustrated in the table below: