Experts pointed out: the proper use of sunscreen can to ward off the UV.
First of all, the higher of the SPF value, the longer of the sun protection.
Second, SPF value can not be cumulative. Apply two layer of SPF10 sunscreen, only a layer of the protective effect of SPF10.
Third, can not to smear sunscreen immediately go out. Sunscreen with a general skin care products, the need for a certain period of time can be absorbed by the skin. Therefore, to be applied sunscreen 10-20 minutes before go out, 30 minutes before go beach.
Fourth, do not have effective immediately apply sunscreen, and to achieve a certain amount can play effect. Usually apply sunscreen to the skin on the amount of 2 milligrams per square centimeter, can only be achieved due sunscreen effect.
Fifth, the people of different skin should choose a different sunscreen. Oily skin should choose a stronger penetration of water-based sunscreen; dry skin should choose a sunscreen cream; neutral skin generally do not have stringent requirements.
Sixth, sunscreen can not be used in the cosmetics before, should be used in skin care products after smear.
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