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@lloydarmbrust , I’m curious about the fail rating for masks where Standard = KN95 is fail? Specifically for masks that claim to be KN95 and filtration values
by Tagbert 5y ago
@lloydarmbrust ,
I’m curious about the fail rating for masks where Standard = KN95 is fail?
Specifically for masks that claim to be KN95 and filtration values are high.
How do you determine a failure here?
Just curious. I think this work is amazing.
- lloydarmbrust 5y agoThanks! Yes we are adding those notes now... most of the KN95 fails are the incorrect markings on the mask. To pass the GB2626-2019 standard (where the KN95 lives) you have to put the manufacture name, standard name (eg, "GB2626-2019"), and mask type (eg, "KN95"). About 90% of "KN95s" on amazon are fake because they do not include this... I image because the manufacturers are just trying to make a quick buck and didn't ever read the 57 page standard. If a KF94 fails it is usually because it's not made in South Korea where all official KF94s are made.
- theogravity 5y agoIt'd be nice if there were notes on the failures on why it failed. I'm on mobile so I'm not sure if you are providing that information or not on the page.
- DangitBobby 5y agoDo you consider this to be an important criteria? Are there any practical concerns when buying a mask that doesn't technically meet the spec that I'm not aware of?