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Executive standard: GB19083-2010
It can be used for respiratory protection of some particles, such as dust generated in the process of grinding, cleaning and handling minerals, flour and some other materials, etc., and it can also be used for liquid or non oil particles that do not produce harmful volatile gases due to spraying. It can effectively filter and purify the abnormal smell inhaled (except toxic gas), and help reduce the exposure level of some inhalable microbial particles (such as mold, anthrax, tuberculosis, etc.)
Difference Between N95 vs. KN95 Masks
N95 masks have slightly stricter requirements for pressure drop while inhaling. That means they’re required to be slightly more breathable than KN95 masks.
N95s also have slightly stricter requirements for pressure drop while exhaling, which should help with breathability.
Conclusion: N95s and KN95s are both rated to capture 95% of particles, although only KN95 masks are required to pass fit tests. N95 masks have slightly stronger requirements for breathability.