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A dust mask is a flexible paper pad held over the nose and mouth made for protection against chronically toxic nuisance dusts, ...
A respirator is a device designed to protect the wearer from inhaling hazardous atmospheres including lead fumes, vapors, gases and particulate matter such as dusts and airborne pathogens such as viruses.
It is mainly used as a dust mask (for example for DIY jobs). Dust can cause lung diseases, such as silicosis, anthracosis, siderosis and asbestosis (in particular dust from silica, coal, iron ore, zinc, aluminium or cement are common particulate risks).
An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.
Example of measurement of efficiency of the respirator (in the workplace). Description: (1) personal sampling pump, (2) the cassette and the filter for determining the concentration (in the breathing zone), (3) the sampling line (from the breathing zone), (4) the cassette and the filter to determine the concentration (under a mask), and (5) the sampling line (from the mask).
That’s three-quarters of 129 billion masks that end up in the trash monthly — or 3.4 billion daily — according to one frequently cited estimate of global mask use, and that’s on top of all ...
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