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Re:NanoHack, an open-source 3D printed mask against Covid-19 by mhb on Friday March 20, 2020 @03:07PM (#22640565)
I realize this is a best effort kind of thing so maybe these questions aren't in the scope but:

1. Is the intention that the mask be disinfected after wearing it?

2. In assembly instruction #5, it says "If you use a filter...". Why would someone use this without a filter?

3. Is there an advantage to this over buying a cartridge type construction mask?

Re:NanoHack, an open-source 3D printed mask against Covid-19 by thrill on Friday March 20, 2020 @03:15PM (#22640637)
Unless it degraded the material, I'd disinfect anything that would be touching my face with rubbing alcohol.

A filter would be better.

I've not worn construction masks, but military style gas masks are absolute misery after a couple of hours because of the weight and the one-size-fits-all approach. A custom fit (because of the thermoplastic deformability) should make something this light weight far more comfortable for hours of use.