Good question redadare Archived Message Posted by walter on May 11, 2020, 12:08 pm, in reply to "Is this an accurate representation?" Some good answers (some a bit hasty) which I think reveal it's not so simple. After all masks are supposed to protect healthcare staff from patients' viral emissions. As David says, the amount of viral particles you cop seems to matter. I'll just throw in another angle here to extend this idea; even if the size of the gaps far exceeds the size of particles or droplets (possibly diminishing due to evaporation as in Flash's graphic) they will likely catch a proportion of the droplets; as some presumably hit the mask material. The N25 claims to stop 95% of particles. This is presumably due to the material being mostly 'mask' not 'spaces'. It would also suggest why even a home made mask made of fabric might help; catching even half of the droplets reduces the amount copped by half. This depends on a degree of proportionality in the effect of the substance of concern - wouldn't work if tiny amounts are lethal. Hope helps Message Thread: Serious question about masks - redadare May 11, 2020, 3:41 am Re: Serious question about masks - Ken Waldron May 11, 2020, 4:12 am Why dont you know this Red?? - Adamski May 11, 2020, 5:06 am I ain't got a cough NM - redadare May 11, 2020, 5:29 am Re: I ain't got a cough NM - Adamski May 11, 2020, 5:47 am uncalled for - please refrain from abuse like this - cheers. nm - dan May 11, 2020, 6:46 am THe point was made by MoA ages back - - David Macilwain May 11, 2020, 8:57 am Is this an accurate representation? - flash May 11, 2020, 11:13 am Good question redadare - walter May 11, 2020, 12:08 pm Sorry accidentally let slip my mask patent number :) :) - walter May 11, 2020, 12:11 pm A good illustration Flash, - David Macilwain May 11, 2020, 2:06 pm It comes from this site David.. - flash May 11, 2020, 3:44 pm No. - Shyaku May 11, 2020, 5:46 pm Its a very reasonable question, because a virus was originally defined as a 'filtrable agent' - Shyaku May 11, 2020, 5:44 pm Chamberland filter .. - Shyaku May 11, 2020, 5:50 pm   Searching