Less than P, how to protect yourself from sunburn is a headache.

Facing the dazzling sunscreen in the market, a href= "//m.pmae.cn/" target= "_blank" > clothing < /a >, consumers are very entangled: is the sun protection effect good or bad? There are rumors on the Internet that the "sunscreen clothing" sold on the market is more common than the ordinary a href= "http:// m.pmae.cn/" target= "m.pmae.cn/" and "clothes".

< p > aiming at these questions, the reporter launched the truth investigation.

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< p > experimental sampling < /p >

< p > reporters search for sunscreen clothes on Taobao shop, jump out of 220 thousand treasures, the average price is about tens of dollars.

The reporter bought a "Jun Jun" brand of anti UV genuine sun protection clothing, known as "quality inspection", with a monthly sales volume of 130 thousand, the reporter chose a phosphor, promotional price of 24 yuan.

Random in Hangzhou City, a small commodity market, reporters found a similar material sunscreen clothes, chose a blue, priced at 40 yuan.

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< p > then, the reporter came to some fashion and outdoor brand stores. The price of these sunscreen clothes is much higher than that on the Internet, and the selling price is between 200 yuan and 600 yuan.

Reporters in a department store "NORTH FACE" (North) counters found a marked "UPF 50" type of gray T-shirt, priced at 228 yuan.

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< p > at the same time, the reporter also bought a black, white and two pure cotton T-shirt, as a representative of "ordinary clothes" samples.

Come to Zhejiang a href= "//m.pmae.cn/" target= "_blank" > textile < /a > Test Institute for testing.

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< p > experimental process < /p >

< p > first, 5 pieces of clothes were placed in a constant temperature and humidity environment with a temperature of 20 degrees and a humidity of 65% for 24 hours.

"Because temperature causes the body to expand and contract, and the humidity affects the weight of the object.

To avoid errors, these conditions must be controlled. "

Yan tech explains the technical inspection department of Textile Institute.

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< p > then, samples were taken, and 9 samples were cut from different parts of the back, hand and front of each garment.

Because sampling standards are strictly regulated, it is necessary to make random sampling at more than 4 locations when testing, and every part of the random sampling must meet the national standard, so that the product is calculated.

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< p > finally, put these samples in the UV tester, and the instrument gives the test results.

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< p > experts explained to reporters that ultraviolet radiation is divided into three bands, of which the ultraviolet wave that causes skin tanning is UVA (wavelength 320 to 420nm radiation wave, commonly known as long wave). UVA can go directly to the dermis of the skin, destroy elastic fibers and collagen fibers, and Tan our skin.

Therefore, the first thing to compare is the so-called sunscreen clothes and ordinary clothes, which is better for UVA band ultraviolet protection.

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< p > experimental results < /p >

< p > test results are as follows: the ordinary black and white T-shirt's ultraviolet protection effect is even more obvious than the two bought by reporters from online and small shopping malls.

That is to say, it is called sunscreen clothing, and no ordinary clothes are more sunscreen.

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This brand of sunscreen clothing is clearly marked by P.

After the experiment, the "sunshade" effect of the grey sunscreen T-shirt on the north side was also reduced by two ordinary T-shirts.

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< p > UPF value analysis, the test results: two pieces of sun protection jacket purchased from online and small commodity markets, UPF is only 3, far below the standard value of ultraviolet protection products (>40), and two black and white T-shirts purchased by reporters at random, UPF values are 50+, far higher than the front 3.

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< p > it turns out that no matter what brand of sunscreen suits this test is, there is no more sunscreen than this ordinary T-shirt.

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< p > the test results of brand sunscreen clothing also differ from their own UPF values: the "north side" brand of sunscreen shirts, UPF rating is 50, and the actual test results are only 41.

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< p > anti ultraviolet product is not called /p.

< p >, does the country have corresponding standards and regulations for sunscreen performance of sunscreen clothing? < /p >

< p > Yan Yan introduces that the state has a standard for textile GB/T 18830-2009 "evaluation of ultraviolet radiation resistance of textiles". Only the ultraviolet protection system value of textiles, that is, UPF value is greater than 40, and the pmittance of UVA is less than 5%, can be called "anti ultraviolet product".

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< p > however, this GB/T is a recommended standard and is not mandatory a href= "//m.pmae.cn/news/index_q.asp" > < /a >.

However, if the enterprise has tagged this standard on the product, it will represent this enterprise to accept and adopt this standard.

The "north side" brand of sunscreen shirts is marked UPF to 50, while the actual test result is only 41.

Although it meets the requirements of UV protection theoretically, it has the suspicion of exaggerating efficacy.

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