| SPF |
Sun Protection Factor. This number usually between 0-50 determines the amount of sun that is blocked by a sunscreen. A number 15 SPF sunscreen blocks 95% of the sunrays. EyeFacialCare.com usually recommends applying a higher SPF (30) as it is has been shown that people usually apply less sunscreen than is needed. Sunscreens should be applied several times a day if one is out in the sun.
출처: www.eyefacialcare.com/glossaryn-z.asp
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