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A comment on Estimated 1.56B face masks will have entered oceans in 2020. Parent comment

Re:Estimated 1.56B face masks will have entered oceans in 2020 by vxNsr on Tuesday December 15, 2020 @03:59PM (#25435188)
> 3M P100 industrial respirator with a retrofitted exhalation valve filter

do you have the model number for this mask? why did you have to retrofit it?

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Re:Estimated 1.56B face masks will have entered oceans in 2020 by ceejayoz on Tuesday December 15, 2020 @04:10PM (#25435304)
> why did you have to retrofit it?

My 3M P100 filters incoming air, not outgoing. There's a valve for exhalation. I just wear a surgical mask over the valve.

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Re:Estimated 1.56B face masks will have entered oceans in 2020 by luto on Tuesday December 15, 2020 @04:13PM (#25435326)
"Recommended Application" for one of these masks:

> Assembly and Mechanical, Chemical Clean-up, Chemical Handling, Chipping, Chiseling, Cleaning, Furnace Operations, Grinding, Laboratories, Machining, Masonary, Painting, Pouring/Casting, Sanding, Sawing, Welding

They are intended to protect yourself from the environment, not the other way around. So they come with incoming filters only. To change that, a retrofit filter is needed.

https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-...

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