Cloth Masks (CM) and Surgical Masks (SM) The pores or opening sizes in cloth and surgical masks range from 80 to 500 microns, which is much larger than particular matter (PM) in the nano micro range such as nitrogen dioxide (NO2), carbon monoxide (CO), hydrogen cyanide(HCN), titanium dioxide (TiO2), aluminum dioxide, carbon dioxide (CO2)l, bacteria, … Continue reading Does a Cloth or Surgical Mask Provide Protection Against chemical, Radiation or Biological Pollutants?→
