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I looked at the linked page and it had a big list of masks, each of which linked to a page about that mask with a picture but no information such as test result

I looked at the linked page and it had a big list of masks, each of which linked to a page about that mask with a picture but no information such as test results. Was that intended? Could you just ditch all the fancy web design and have a big table with test results for each mask, with an ordering link for the models that you sell? That would be awesome. It would be great if you also sold the stuff you use for testing masks. I spent a while looking into testing masks myself, but then the shortage eased up so it seemed less important.

lloydarmbrust 5y ago
Testing masks is very specialized and all in I've spent about $250k on the mask lab. I just bought a new machine that costs about $90k. Here's an overview of the machine: https://www.youtube.com/watch?v=vpjajJrDWBk https://www.youtube.com/watch?v=vpjajJrDWBk
- throwaway81523 5y ago
  Thanks, I'll watch the video when I get a chance. My idea was to basically reproduce the setup in Joel Amilcar's PhD thesis (https://ir.uiowa.edu/etd/2002/ https://ir.uiowa.edu/etd/2002/) using an off the shelf air quality sensor (PM2.5 with the hope of being able to extrapolate below that size), using a salt spray nebulized with vape gear. I didn't have any good ideas about how to control the particle size (this isn't my area at all) so had hoped to get some advice at some point (let me know if you have any thoughts). I had remembered reading about a guy on Youtube who did some tests like that but never managed to find the channel. Maybe it was yours! Someone else here mentioned Aaron Collins so I will have to check his videos too. I think it would be great to have easily reproduceable, low cost test equipment available at shops and clinics because the quality of masks (even of a specific make and model) is likely to vary between units. You might find a good mask with your tests, and then find that your next order of the exact same mask is crap. So you have to keep testing. Maybe it is less bad now. I was interested in this more when masks were in very short supply, but then I managed to get a few boxes of them, and set the testing idea aside.
nyanpasu64 5y ago
> I looked at the linked page and it had a big list of masks All test results disappear when the browser window isn't wide enough (eg. on mobile, or narrow PC windows).

lloydarmbrust 5y ago

Testing masks is very specialized and all in I've spent about $250k on the mask lab. I just bought a new machine that costs about $90k. Here's an overview of the machine: https://www.youtube.com/watch?v=vpjajJrDWBk https://www.youtube.com/watch?v=vpjajJrDWBk

throwaway81523 5y ago
Thanks, I'll watch the video when I get a chance. My idea was to basically reproduce the setup in Joel Amilcar's PhD thesis (https://ir.uiowa.edu/etd/2002/ https://ir.uiowa.edu/etd/2002/) using an off the shelf air quality sensor (PM2.5 with the hope of being able to extrapolate below that size), using a salt spray nebulized with vape gear. I didn't have any good ideas about how to control the particle size (this isn't my area at all) so had hoped to get some advice at some point (let me know if you have any thoughts). I had remembered reading about a guy on Youtube who did some tests like that but never managed to find the channel. Maybe it was yours! Someone else here mentioned Aaron Collins so I will have to check his videos too. I think it would be great to have easily reproduceable, low cost test equipment available at shops and clinics because the quality of masks (even of a specific make and model) is likely to vary between units. You might find a good mask with your tests, and then find that your next order of the exact same mask is crap. So you have to keep testing. Maybe it is less bad now. I was interested in this more when masks were in very short supply, but then I managed to get a few boxes of them, and set the testing idea aside.

nyanpasu64 5y ago

> I looked at the linked page and it had a big list of masks All test results disappear when the browser window isn't wide enough (eg. on mobile, or narrow PC windows).