"These turned out to be stretchy car shop towels like the ones you see here and can find at most hardware stores and auto centers, which filtered out 93% of particles as small as 0.3 micrometers compared to the (at best) 60% from cotton masks.
As Business Insider reported it's worth noting that while the Scott Pro Shop towels shown here are one of the most recognizable brands of these towels, the ones made by ToolBox and ZEP's industrial blue actually worked better in their tests."
I don't understand the rating of the shop towels but supposedly they are better than cotton,but not as good as vacuum cleaner bags....need to find verification of this. -G
What Are The Best Materials for Making DIY Masks? Cambridge University Study
I am sure we all know who NIOHS is, but for those of us who don't, the National Institute of Occupational Health and Safety is the authority who sets the Standards for many aspect regarding exposures including respirators in North America .
I thought this link might be interesting and shed some info on the subject of filter efficiency , and the different ratings of N P or R respirators.
-- Edited by silver steak on Friday 3rd of April 2020 08:22:00 PM
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New Brunswick , 1950 Pontiac Silver Streak 2 Dr Sedan, 1967 Beaumont, 1985 Sierra 1500 One Owner
When the time comes, I will be wearing a N95 mask in public, but I'm not quite there yet.
My wife has been wearing a N95 and gloves when she does chores around her Mother's unit in a seniors residence once a week. Her Mother has voluntarily self-isolated from the rest of the seniors in her residence. They still gather in a common area.
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Prince Edward Island
'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.
