Masks

With the pandemic coming, and knowing the effectiveness and importance of masks, I got busy making top quality re-usable ones around the end of March. These are made from top quality fabrics and offered in a standard 2-layer version and high-performance 3-layer masks. They are available for purchase here:

https://www.ebay.com/itm/254577982386

After numerous experiments, I determined that pure cotton muslin is the most comfortable inner liner and this is used on all my masks. Attractive outer designs of high density cotton are available in various styles. Ear bands are comfortable 1/4-inch elastic. All materials are pre-shrunk.

Masks are equipped with a 6-inch wide padded annealed copper nose wire to conform the mask to the shape of your nose and face. This stops leakage and fogging of eyeglasses, and improves filtration effectiveness.

High-performance masks include a third inner layer that serves as an electrostatic filter. These masks deliver 97 to 98 percent filtration efficiency on particles as small as 10 nanometers.

The science behind it and test results are published by the American Chemical Society here:

https://pubs.acs.org/doi/full/10.1021/acsnano.0c03252

There are about 30 designs and more are added to the eBay listing every few days. The most recent additions are hand-sewn Italian, Guatemalan, and Pan-African masks.

Please take a look.

Published by

Phil

Hello. I'm a retired electronic hardware, software & mechanical engineer. My hobby is making metal art. My interests range across writing, economics, politics, history, photography, fountain pens, languages, ham radio, and music. I've been writing software since 1968. The Paradox of Tolerance: If a society is tolerant without limit, its ability to be tolerant is eventually seized or destroyed by the intolerant. --Karl Popper

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