KN95 is one of the grades specified in China standard GB2626-2006, and N95 is one of the grades specified in American Niosh standard 42 CFR 84. The technical requirements and detection methods of these two levels are basically the same, and the filtration efficiency can reach 95% under the corresponding standards. However, it should be noted that the medical protective masks used by medical staff, especially those who have direct contact with COVID-19, are a kind of N95, but not all N95 masks are medical protective masks.
Precautions for wearing KN95 mask
Wash your hands before wearing a mask, or avoid touching the inside of the mask during wearing, so as to reduce the possibility of pollution of the mask and distinguish between the inside and outside of the mask and the top and bottom; The printed surface of KN95 mask is outside; One end of the metal strip/sponge strip is above the mask.
Don't squeeze the mask, including N95 mask, only isolate the virus on the surface of the mask. If you squeeze the mask by hand, the virus will soak the mask in the form of droplets, and there is still a chance to be infected with the virus.
Be sure to make the mask fit the face as much as possible. The simple test method is: after wearing the mask, exhale forcefully, and the air cannot leak from the edge of the mask.