Re:Secret gyms and the economics of prohibition
by djhn on Thursday August 20, 2020 @08:55AM
(#24222706)
The "95" in N95 refers to it filtering 95% of all particles in general, and particles with a diameter of 2.5 micrometers specifically.
The relationship between particle size and the ease of filtering them is U-shaped, not linear, with the dip at around 2.5 micrometers being the bottom of the trough.
The relationship between particle size and the ease of filtering them is U-shaped, not linear, with the dip at around 2.5 micrometers being the bottom of the trough.