What Does “SPF” Mean?
April 14, 2023 | 
Author The “Sun Protection Factor” (SPF) contrasts the time that
it takes to burn with a given sunscreen on your skin versus
the time that it takes to burn without any sunscreen. For
example, if you normally burn mildly in 30 minutes without
sunscreen, with an SPF 29 it would take 14.5 hours to burn
(29 x .5).
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