Fit Test

Without a test, we can’t know if anything we are doing is effective and it is impossible to personally verify if someone else’s design is effective. This page is dedicated to documenting standard testing procedures and developing home/DIY test procedures to validate homemade mask designs.

OSHA Fit Test Information
https://www.osha.gov/video/respiratory_protection/fittesting_transcript.html

Qualitative Fit Test Using Smoke

Medical Respirator N95 Fit Test Instructions 3M Health Care Respirator & Surgical Mask

Healthcare workers are required by law to undergo a “fit test” every year to ensure they know how to use N95 respirators properly.

“While you’re wearing this mask, somebody sprays something really nasty around you — it’s a chemical that makes everybody cough their brains out if it gets in their mouth, and it’s a test to see if that mask is really working,” Robert Amler, a former medical officer at the CDC and a dean at New York Medical College, told Business Insider.

https://www.businessinsider.com/wuhan-coronavirus-face-masks-not-entirely-effective-2020-1