Sunscreen, for the love of beauty MM is the top priority in the summer, not only to maintain the fairness of the skin, but more importantly, to ensure the health of the skin, because UV rays in addition to visually darken the skin, but also cause deep damage to the skin, such as dark spots and aging. The correct use of sunscreen is particularly important, do not make these 6 sunscreen contraindications Oh. 1, the higher the SPF value, the longer the sunscreen time. General yellow skin can withstand an average of 15 minutes of bright light without being burned, then use SPF15 UV protection products can withstand about 225 minutes of strong ultraviolet radiation. Daily care, shopping, shopping can use SPF5 to 8 sunscreen products, when you go out to play can use SPF10-15 sunscreen products. When swimming or sunbathing, use waterproof sunscreens with SPF 20 to 30. When the exposure time exceeds the effective sunscreen time should be timely supplemental coating. 2, SPF value can not be cumulative. Coated with two layers of SPF10 sunscreen, only one layer of SPF10 protection effect. 3, can not go out before applying sunscreen. Sunscreen with general skin care products, need a certain amount of time to be absorbed by the skin. So it should be applied 10-20 minutes before going out. Skin care tips 4, sunscreen is not painted on the effective, but to reach a certain amount to play the effect. Usually sunscreen in the skin coated amount of 2 mg per square centimeter, in order to achieve the desired effect of sunscreen. 5, different skin types should choose different sunscreen products. Oily skin is appropriate to choose a strong penetration of water-based sunscreen supplies; dry skin is appropriate to choose a cream sunscreen supplies; neutral skin is generally no strict provisions. 6, sunscreen can not be used before makeup, should be applied after the use of skin care products. Although some makeup products have sunscreen function, but as a specialized sunscreen, but should be applied before makeup.