4 ms·
This is why when I lived in Korea we'd only buy KF94 made in Korea. KF94 made in China were also usually counterfit. It is crazy to me how everyone buys "KN95"
by hooo 5y ago
This is why when I lived in Korea we'd only buy KF94 made in Korea. KF94 made in China were also usually counterfit. It is crazy to me how everyone buys "KN95" in the US.
- ianai 5y agoIs there a good way to tell? Like at home.
- orangepurple 5y agoWild speculation but it might be possible if you had a calibrated hyperspectral camera, calibrated light source at a known distance and luminous flux level, and a database of known good masks. I mean the equipment "fits" "at home" (lol) I wonder if its possible to burn masks and analyze the spectrum of the light emitted by the burning masks. Might need a hyperspectral camera for that and it might not yield any useful information.
- drjasonharrison 5y agoKnowing that the material is polyethylene doesn't tell you the mesh density or electrostatic charge.
- drjasonharrison 5y agoUsing a PM2.5 detector, a vacuum and a source of particles ( burning incense). You could probably rig. Something up. But without the right equipment you'd be guessing if your set up was measuring the correct thing.
- dustintrex 5y agoI hate to break this to you, but Chinese manufacturers can and do fake the "Made in X" labels as well.