The Ultimate Guide to Homemade Face Masks – Supplemental Data
- Paddy Robertson
- Paddy Robertson
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Hi, thanks for sharing the experimental setup! I was wondering if it is possible to simplify the setup for use at home? I have been using a low cost particle counter connected to a PC for data collection. However, when I use e.g. the surgical mask the ambient sensor reading drops to zero – it might be that where I live the ambient pollution is too low? So I have used a pollution source instead of relying on the ambient pollution. How critical is the tube length, diameter and fan to the experimental setup?
What are the specs of a kitchen “tea” towel since there is so much variation on the market?
Hi. Excellent work and thank you for all your information. I propose test the cotton pads commonly used for make up remove, I being used 1 cotton pad between 2 layer of non woven polypropylene (from shopping bags) like a sandwich. I think it works like a depth filter based in Brownian motion and diffusion effect. Thanks a lot.
Hello,
thank you for this test and for sharing all that valuable information.
This latest test says paper towel is actually a pretty good filter.(96%/47%) or am I mistaken?
However, in your older kitchen paper towel test the results were less favourable (about max. half the filtering capacity).
Am I mixing something up?
thx.
Hey guys, thanks so much for this info, I read your original artlcle before I started making masks for family, friends, neighbors etc. I’ve been using two layers of 100% cotton (from quilting supplies) and making a filter layer inside made from 100% recycled bottles ( Whole Foods reusable grocery totes). If you do another round of testing, it would be great if you added that sort of layer, for example test the combinations – 2 layers of cotton w/ a coffee filter and/or the polypropylene layer. Thanks for doing this and publishing this.