Disposable dust masks have the same
APF as for half-
mask air-purifying
respirators,
APF 10. An
APF of
10 means that dust masks (if used properly) can be safely used in an atmosphere that has a hazardous concentration of up to
10 times the Permissible Exposure Limit (PEL) or other exposure limit for that hazard.Nov 1, 2015
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