There are a lot of exquisite “pig-boys”, so there are some exquisite boys in Shanghai East China University recently, and they took sunscreen during military training. During the military training break, some students began to talk about their own skin care essentials. Some boys said that they prepared a lot of sunscreen before the military training. Then the question came, how should boys choose sunscreen? ?
How to choose sunscreen
No matter what skin care products you buy, don’t think that the price is good, you must choose the one that suits you. For sunscreen, be sure to pay attention to the following points:
1, USB and USV logo
UV is divided into UVA (tanning, the culprits of aging; long wavelength; to the dermis) and UVB (short wavelength; the culprit of sunburn and sunburn; to the table Cortex). Anti-UVB to see the SPF index, anti-UVA to see the PA index.
2, SPF sun protection factor
The SPF value is different, indicating that the effective sunscreen time is also different, the sunscreen calculation method: the product with a sun protection factor of 15 can protect you for 5 hours. For example, 20 (minutes) * 15 (SPF)= 300 minutes (5 hours), and so on.
3, PA value
PA is a Japanese sunscreen index measurement standard. The test standard is the stability index of skin persistent melanin precipitation (PPD) after 2 – 4 hours of sunlight exposure. PA protection is PA+, PA++, PA+++. “+” The more words, the better the effect of preventing UVA and the longer the effective protection time. Calculation method: PA+ protection time is about 2 – 4 hours. PA++ protection time is 4 – 8 hours and PA++ protection time is 4 – 8 hours.
4, chemical sunscreen and physical sunscreen
Now it is basically a combination of chemical + physical, to ensure the effect of sunscreen, the safety of sunscreen, and not thick enough (The drawbacks of physical sun protection) make you want to escape.
Of course, in addition to this accident, it depends on your skin problem. Not every sunscreen is suitable for you. For example, after use, there may be allergies, the skin is too oily, the skin is too dry, etc. Situation, so be sure to try it before you buy it. Summer is here, no matter if you are a young lady or a younger brother, remember to protect your skin.
The above is the exquisite boy military training brought to you by Yishengsheng. With the relevant content of how to choose sunscreen, more health information, remember to pay attention to Yiyangsheng.