How effective sunscreen in summer
The weather is getting hotter in summer and the skin is exposed to the sun. It will inevitably cause great harm. How effective is sunscreen in summer? Many MMs, hats, sun umbrellas, sunglasses, gloves, sun shawls... all defensive tools are used. As far as the faces, arms, and legs are exposed to sunlight and cannot be completely covered, many people think that if they choose a sunscreen skin care product that suits them, they will be able to make a difference. In fact, people still have a lot of sunscreen misunderstandings. For this reason, we deliberately list some summer sunscreen common sense. Even if you already knew it, it would be beneficial to review it.
1.18 years old is the key to sun protection
Most adult melanomas are caused by exposure during childhood, and infants up to the age of 6 cannot bathe in baths. Children up to the age of 7 wear T-shirts, sunhats and sunscreen for children. At noon in summer From 12 o'clock to 2 o'clock no go out.
2. People exposed to the "capital" of about 5000 hours
According to statistics, ordinary people can cause skin cancer for 5,000 hours in the sun, but this time of daylight refers not only to the summer sun's exposure but also to all daily contact with the sun. Therefore, there are more sun exposures and more demerit points. When 5,000 hours have been deducted, exposing the skin to sunlight is very dangerous.
3. Sunburn is not the only damage the sun causes to the skin
As we all know, the sun's exposure will cause stains, wrinkles, loose skin, but these are just what we can see with the naked eye. In fact, it will also cause a certain degree of damage to cells and genes. Some cells are killed on the spot, and some injured cells will release a chemical substance that stimulates capillaries and causes them to rupture, which is what we usually mean. Say it on the sun. In particular, UVA can penetrate the skin, destroy the DNA, make the skin lose its elasticity, and can cause skin cancer severely.
4. The stronger the ultraviolet radiation is, the higher the temperature is.
First of all, we should clearly understand that ultraviolet light does not produce heat. For example, when you are at the seaside, when you are climbing a mountain, or when you are sand-sliding, the cooler you feel, the stronger the ultraviolet light.
5. The ability of the skin to withstand the sun is different from person to person, due to time and latitude.
Sunscreen lotions on the market are divided into different grades with SPF numbers; the greater the number, the longer the protective effect. Usually, the sunscreen protection time is the SPF number multiplied by 15 minutes, like the SPF8 sunscreen time is 120 minutes. If you play in the mountains, you only need to do general sun protection. You can choose SPF8 sunscreen lotion. However, if you go to the sea to swim, you need to use more than SPF15 sunscreen; at noon, when the sun is strong, you must use SPF30 sunscreen.
6. SPF30 sunscreen is twice as effective as SPF15 sunscreen
Although the ability of the SPF30 sunscreen to block UV rays is greater than the SPF15 sunscreen, it does not mean that the SPF30 sunscreen can block twice as much UV light. If SPF15 can block 94% of UV rays, SPF30's sunscreen can block 97% of UV rays. Of course, no matter what kind of sunscreen, you should reapply once every 2 to 3 hours.
7. Play the parasols can not block all the risk of sunburn
In fact, 50% of the UV light can pass through the parasols. It can only isolate the UVA (melanin) that causes a burning sensation, while the UVB (aging factor) can penetrate the parasols without difficulty.
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