One Twitter user shared a video clip on how to modify surgical masks for effective filtration. Just place folded tissue papers between the mask and the face for effective filtration.
Mar 24, 2020 · The N99 masks can filter out particulate matter 2.5 by up to 99 percent, but then, it can also not work well if worn to filter oil based particulates and pollutants. If youre going to base your decision based on the higher filtration ability, then you can say that the N99 is better than the N95. How good are N95 masks?
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Pleated, standard, surgical masks also had good filtration efficiencies, but other types of masks (non pleated, single layer) for use in healthcare settings performed very poorly against volcanic ash. Cloth materials provided limited filtration, although this was slightly improved by layering the cloth.
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