Koolau
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
I was trying to look up info on tight-fitting bio masks. I used these occasionally at w*rk (not bio, but tight-fitting with chemical cartridges). They were considered to be 100 protection factor IIRC. I was thinking these might be better for Costco runs assuming the right bio cartridge or ultra filtration cartridge was available.
WELL, I didn't find exactly what I was looking for but I found a site that has a bunch of info on masks. Take the info with your own margarita salt, pink sea salt or Morton salt (iodized, if you prefer). I take no position on the info (don't know the site's biases if any, etc.) but was exposed to a lot of this stuff way back in the day when I studied occupational health. (Heh, heh, it's been a long time since I thought about brownian motion.)
I'm guessing this is way more info than most of us want/need, but it might be interesting to some. Definitely a YMMV situation.
https://fastlifehacks.com/n95-vs-ffp/
WELL, I didn't find exactly what I was looking for but I found a site that has a bunch of info on masks. Take the info with your own margarita salt, pink sea salt or Morton salt (iodized, if you prefer). I take no position on the info (don't know the site's biases if any, etc.) but was exposed to a lot of this stuff way back in the day when I studied occupational health. (Heh, heh, it's been a long time since I thought about brownian motion.)
I'm guessing this is way more info than most of us want/need, but it might be interesting to some. Definitely a YMMV situation.
https://fastlifehacks.com/n95-vs-ffp/