I am not the author of these posts – they are from the Smart Air Filters website by their CEO, Paddy Robertson. With the COVID-19 and Corona Virus emergency, many are struggling to download these articles to make use of their information. I’m only providing them here until his website is back up or the current quarantines in the US and Europe are over. (Thank you, Mr. Robertson.)
These articles cite a primary source as their inspiration: (2013) “Testing the Efﬁcacy of Homemade Masks: Would They Protect in an Inﬂuenza Pandemic?”
Article 1: What are the Best Materials for DIY Masks?
Use two pillow cases, that works well enough. From a personal standpoint, I’d add a swiffer dry sheet to get some electrical charge.
Article 2: Can DIY Masks Protect from Corona Virus?
They are about 50% as efficient as a surgical or N95 mask.
Masks work worse after washing. Don’t wear a wet mask! Masks depend on charge to work. Find ways to add back charge.
It depends. In a room with lots of droplets, N95 has a better seal. Surgical protects against droplets.
Article 5: How Long do Pollution Masks Last?
Get 3 hours out of your mask!