Useful links on Covid-19
Work in progress - DRAFT, WORK IN PROGRESS
(video) Face Mask vs Respirator Comparison by 3M
Homemade masks can't be compared to FFP2 nor to FFP3 masks but some studies (1) showed that efficiency of homemade masks can be close to surgeon masks. The choice of the material used and minimizing air leaks is crucial. Coton or paper masks are not a good choice because drops of fluid will be absorbed and accumulated, fine mesh polyester is a better choice (2).
Many youtube videos can be found but most are using paper or random tissue. Some ideas are good but since our health is concerned, we need some scientific validation on the efficiency of homemade masks and reproductible guide on fabrication.
Important remark: these studies were performed on a small set of candidates. More references are needed to double check results.
(1) Testing the Efficacy of Homemade Masks: Would They Protect in an Influenza Pandemic?
Filtration tests of HEPA filters
List of scientific publications about masks efficiency (including homemade masks): https://docs.google.com/document/d/1HLrm0pqBN_5bdyysOeoOBX4pt4oFDBhsC_jpblXpNtQ/edit#heading=h.9yzpxufkt5ow
https://www.blog-couture-facile.fr/wp-content/uploads/2020/03/20200317_TutoMASK_COVID19_NL.pdf
(Thaïland) Medical chief suggests use of muslin cloth for homemade face masks
(Taïwan) Taiwanese Doctor Teaches How To DIY Cloth Face Mask With Air Filter, So No Need To Scramble At Stores (original post was on facebook, asiaone made the original news/translation about this)
(France) Interesting guide (for a french hospital) but we should use polyester instead of cotton or paper (2):
- https://twitter.com/aclaudevenot/status/1239588804031381504
- https://www.youtube.com/watch?v=7Lg0jnJ3hEo&feature=youtu.be&app=desktop
The following articles are based on the scientific publication here above:
- https://smartairfilters.com/en/blog/paper-towel-effective-against-viruses-diy-mask/
- https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/
- https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/?rel=1
https://www.notechmagazine.com/2020/03/open-source-breathing-ventilators-covid19.html
https://www.facebook.com/groups/670932227050506/
https://docs.google.com/document/d/1FNPwrQjB1qW1330s5-S_-VB0vDHajMWKieJRjINCNeE/edit
Faceshield printed for pre-triage Covid of some Brussels'hospitals: https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2
https://www.3dnatives.com/en/prusa-medical-shields-covid-19-200320205/
https://3dprint.nih.gov/discover/3dpx-013359
NIH (US) approved https://hackaday.com/2020/03/29/nih-approved-3d-printed-face-shield-design-for-hospitals-running-out-of-ppe/
3D Printer Projects (including Pocket Mask and Valve):
- https://www.med3dp.com/downloads
- Direct link: https://www.med3dp.com/s/b_pocketmaskandvalve.zip
- https://www.yeggi.com/q/mask+valve/
- https://3dprintingcenter.net/2020/03/18/copper-3d-makes-the-free-n95-mask-design-to-fight-covid-19-pandemic-spread/
- https://3dprintingcenter.net/2020/03/12/things-worth-3d-printing-in-the-face-of-the-covid-19-pandemic/
- https://cults3d.com/en/3d-model/various/covid-19-emergency-diy-mask
- https://www.reddit.com/r/3Dprinting/comments/fke0oz/coronavirus_3d_printing_megathread/fksz6wa/?context=8&depth=9
- https://fablab-ulb.gitlab.io/projects/coronavirus/protective-face-shields/
- https://enable.hp.com/us-en-3dprint-COVID-19-containment-applications