The best way to prevent ultraviolet rays

In addition to sunscreen clothing, sunscreen must be used to prevent ultraviolet rays. If the sunscreen is used improperly, the sunscreen effect will be greatly reduced. Let's talk about how to use sunscreen.

1. Apply sunscreen half an hour before going out. Because it will take half an hour for the sunscreen to work.

2. Pay attention to the amount of sunscreen. How to use sunscreen to achieve results? Usually, sunscreen cream can only achieve its due sunscreen effect if it is applied to the skin at a dose of 2 mg per square centimeter. In addition, it is best to choose physical sunscreen, which can not only effectively protect against the sun, but also do no harm to the skin, even sensitive skin.

3. The higher the SPF, the better. The calculation method of Spf is as follows: Generally, the skin of yellow race can resist sunlight 15 minutes without getting sunburned, so if you use SPF 15 anti-ultraviolet products, your sun protection time is about 225 minutes (15 minutes ×SPF 15), so SPF is skin anti-ultraviolet. The use of sunscreen, daily care, shopping can choose SPF 5-8 sunscreen products, go out to play can choose SPF 10- 15 sunscreen products. Use SPF 20-30 waterproof and sunscreen products when swimming or sunbathing.

4. How to use sunscreen, but also pay attention to applying sunscreen every 2 to 3 hours when going out, and choose sunscreen products with waterproof function when going out.