You have to know Sun knowledge

Tips for buying sunscreen tips 1: when buying sunscreen, if you dimension the SPF value, is to have a blocking effect on UVB-rays.　　Under normal daily life environment, just about use SPF10, sunscreen for your PA+; outdoor activities if tourists, recommend the use of SPF20 sunscreen of left and right, PA++; and if in Sun activity at high altitude or go to the seaside swimming, sunbathing, you are advised to select sunscreen SPF30, PA+++. Tip 2: SPF does not add up. If the sunscreen be applied for different indices, Sun protection depends on the high number of sunscreen.　　If multiples smear simultaneously twice same sunscreen, sunscreen multiples will not increase. Tip 3: purchase should be based on their needs, is not a high SPF value, the better. Because of the high SPF value, indicating the more kinds of sunscreen products, high concentrations to the skin stimulation will increase.　　Therefore, according to its own characteristics of the skin, active environment, select prevent sunburn while sunscreen with moisturizing and nourishing functions. Tip 4: if summer in outdoor activities, the choice is an efficient protection of sunscreen; daily outdoor activities can be selected for a short time of non-Sun protection products, inefficient in; if you swim, exposure or Hyperhidrosis, preferably water-efficient sunscreen. But from a professional perspective, role of sunscreen is just preventing sunburn, only smaller Sun-black effect. Proper use of sunscreen Sun time: If you apply sunscreen before going out, make skin White Sun for 10 minutes without any resistance.　　Because sunscreen 10-15 minutes after the real difference is that once, so it is right, 10-15 minutes apply sunscreen before going out. Dose: sunscreen coating less, does not meet the Sun effect; painted too much, not only cannot increase sun protection effect, also added burden to the skin.　　Can "can easily cover need Sun parts, accumulation of sunscreen does not occur again," as the standard. Smear method: Scribble face, sunscreen available fingertip dipped in, respectively, at the point in the forehead, cheeks, nose, Chin, and then use the middle finger and ring finger pulp and gently lay the sunscreen on from the bottom, particular attention around the lips, nose, and hair, and other small parts, but also to apply uniform.　　If you want to smear body, due to the larger, it is difficult to paint with your fingers, Palm of the hand in a spiral way available. Complement-coated time: in General, no matter what sunscreen you once the multiple of sunscreen, must be applied again once every two hours, especially when high physical activity, or to the sea to swim, and scheduled repair coating in order to ensure a good sun protection effect. （君悦）（据《上海家庭报》）