Show HN: I bought and tested the filtration of every mask on Amazon

Post by bradknowles » Wed, Jan 12, 2022, 1:16 AM UTC

lloydarmbrust wrote: post #12

I've spent about 1,000 hours on this with my team using a very expensive (~$250k) lab and I'd love for this to be a great resource for people when choosing a mask. The heavy lift we are doing here is around our particulate filtration efficiency test in which we do either the NIOSH N95 NaCL (0.3 micron) test or the ASTM 0.1 micron latex particle test. I'd love HN feedback on how we improve the interface and make this…

Post by didntknowya » Wed, Jan 12, 2022, 2:14 AM UTC

wrycoder wrote: post #55

lloydarmbrust wrote: post #12

I've spent about 1,000 hours on this with my team using a very expensive (~$250k) lab and I'd love for this to be a great resource for people when choosing a mask. The heavy lift we are doing here is around our particulate filtration efficiency test in which we do either the NIOSH N95 NaCL (0.3 micron) test or the ASTM 0.1 micron latex particle test. I'd love HN feedback on how we improve the interface and make this…

Your filtration test appears to be only testing the mask fabric, but not the fit. I see a number of surgical masks over 95%. I don't think that would be possible in practice, because of leaks at the sides and top. I'd expect more like 50%. But, you don't appear to have the equipment to do a fit test. Refer to the 3M video on how to fit test an N95. I realize that N95 and surgical masks have different standards, but y…

Post by sandos » Wed, Jan 12, 2022, 6:24 AM UTC

271828182846 wrote: post #184

Full disclosure: I intentionally keep the metal stripe unbent to create two air gaps to both sides of my nose for more comfortable breathing. Cheers!

Post by astura » Wed, Jan 12, 2022, 1:51 PM UTC

lloydarmbrust wrote: post #12

I've spent about 1,000 hours on this with my team using a very expensive (~$250k) lab and I'd love for this to be a great resource for people when choosing a mask. The heavy lift we are doing here is around our particulate filtration efficiency test in which we do either the NIOSH N95 NaCL (0.3 micron) test or the ASTM 0.1 micron latex particle test. I'd love HN feedback on how we improve the interface and make this…

Post by kps » Thu, Jan 13, 2022, 7:20 PM UTC

lloydarmbrust wrote: post #219

kps wrote: post #33

I'm not seeing anything but a list of mask names with no other information. Has the site fallen over? (Chrome 96 on MacOS 11.6)

It wasn't optimized for mobile but is now... please LMK what you think!