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Soapsmith's Notes — sunscreen

Understanding Sun Protection

skincare spf sun sunblock sunscreen

Understanding Sun Protection

There are two types of sunscreen.  Chemical and Physical.  Chemical screens ABSORB the sun's rays while physical ones REFLECT the rays. Physical sunscreens: titanium dioxide zinc oxide  Chemical sunscreens: octinoxate (octyl methoxycinnimate) octisalate (octyl salicylate) oxybenzone (benzophenone) What is SPF?  SPF stands for Sun Protection Factor which was developed by scientists who were studying physical sun damage in 15 minute increments.  In order to better understand what those numbers mean on your sunscreen bottle there is a formula which can be followed to estimate how long your sunscreen can protect you.  This applies to both physical and chemical sunscreens. Say...

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