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Materials science / Re: Face Masks
« on: April 24, 2020, 11:30:19 PM »
Hi, check out the free design of mask we made available at www.maspire.org. Free to use for non-commercial purpose. The shape should get you started.
We've donated low thousands of similar masks to LE in our area (slightly different design allowing for efficient cutting and sewing).
In our experience the side folded masks make for poor nose seals. You absolutely need a stiff insert on the nose for that (electrical copper cable is fine).
Fabric: cotton ca. 180g/sq.m. is fine. We use vlieseline as the inner layer/filter. These are breathable and can be washed up to 90°C.
We've donated low thousands of similar masks to LE in our area (slightly different design allowing for efficient cutting and sewing).
In our experience the side folded masks make for poor nose seals. You absolutely need a stiff insert on the nose for that (electrical copper cable is fine).
Fabric: cotton ca. 180g/sq.m. is fine. We use vlieseline as the inner layer/filter. These are breathable and can be washed up to 90°C.