Replies

To: PA Engineer; bgill

Also, IIRC, Stanford's study showed the masks lost 4% effectiveness at each successive heating (which *compounds*.

84.9% after 4 times; that's as low as I'd go...

867 posted on 03/27/2020 7:17:53 AM PDT by grey_whiskers (The opinions are solely those of the author and are subject to change with out notice.)

To: grey_whiskers

What level of heating?

992 posted on 03/27/2020 1:11:54 PM PDT by Paul R. (The Lib / Socialist goal: Total control of nothing left wort h controlling.)

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