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. 2021 Jul 14;477(2251):20210062. doi: 10.1098/rspa.2021.0062

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© 2021 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 11. — (a) Penetration (%) versus time (h) over a 12 h duration for a new commercial N95 FR (black unfilled circles), intentionally discharged and then CDT recharged N95 FR (black solid circles), a new commercial SM (black unfilled squares) and a post-CDT SM (black solid squares). The NIOSH-mandated N95 standard’s penetration value is shown as a solid red line at the 5% mark.(b) Penetration (%) versus time (hours) for knitted cloth FMs pre- (open symbols) and post-CDT (filled symbols): cellulose (black circles), polyester (blue squares), nylon (red diamonds), PET (green upright triangles) and PPS (purple inverted triangles). Data for this figure are available at [56]. (Online version in colour.)