How face masks are made.
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Previously:
https://www.homemadetools.net/forum/...014#post160561
https://www.homemadetools.net/forum/...151#post165190
https://www.homemadetools.net/forum/...617#post155448
https://www.homemadetools.net/forum/...594#post155375
https://www.homemadetools.net/forum/...304#post154241
https://www.homemadetools.net/forum/...086#post153531