Extremely interesting thoughts on home made masks using *two* fabrics to combine a mechanically filtering fabric, like cotton, with a fabric that can hold electrostatic charge, like silk or chiffon, into an incredibly effective mask.
https://www.sciencedaily.com/releases/2020/04/200424081648.htm …
ht @trinitydraco1
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7:14 AM - 11 May 2020
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