Does the melt blown non woven feature apply to all four ASTM categories. I wonder what UK provisions are.Blaze wrote: ↑Sun Nov 28, 2021 2:56 pmSurgical masks are NON-WOVEN whether made in China or France.Pachapapa wrote: ↑Sun Nov 28, 2021 2:43 pmThe truth of the matter is that WOVEN masks UK made are less effective and dearer than NON WOVEN KN95 masks made in China.exile wrote: ↑Sat Nov 27, 2021 7:13 pm Please do not post nonsense.
They protect others. Do I have to post the link once more for those hard of understanding that surgical masks protect others?
Are there better masks? Yes certainly but please do not denigrate the cheap and effective solution for the population at large.
There are four levels of ASTM certification that surgical masks are classified in, depending on the level of protection they provide to the person wearing them:
Minimum protection face masks are meant for short procedures or exams that won’t involve fluid, spray, or aerosol.
Level 1 face masks often feature ear loops and are the general standard for both surgical and procedural applications, with a fluid resistance of 80 mmHg. They’re meant for low-risk situations where there will be no fluid, spray, or aerosol.
Level 2 masks, with 120 mmHg fluid resistance, provide a barrier against light or moderate aerosol, fluid, and spray.
Level 3 face masks are for heavy possible exposure to aerosol, fluid and spray, with 160 mmHG fluid resistance.
