Which is a better face mask? N95 or a coffee filter.
Smart Air Filters blog has an article discussing various materials to make diy masks from. Here is the link to the article and a chart from the article is below.
Certified Water Technologist #63
Vern's Stories fredhorn37@gmail.com An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
No comments:
Post a Comment