Visit: Many Sunscreen Clothes Are "Three No" Products.

< p > < Beijing a target= "_blank" href= "http://www.91se91.com/" > clothing /a > College of materials science and Engineering Laboratory, laboratory personnel are testing UPF values of 5 samples.

The sun protection clothing, which is light like a cicada and has a bright candy color, is especially popular this summer. Shopping malls, supermarkets, clothing markets and online shops can be seen everywhere.

Recently, reporters asked professional laboratory testing found that 4 sunscreen clothing, only one UPF value (UV protection coefficient) reached the standard, most sunscreen clothes are difficult to prevent UV.

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< p > < strong > a variety of sunscreen clothing sunscreen effect is very different. < /strong > < /p >

< p > the reporter recently purchased 4 sunscreen suits. The laboratory staff of the school of materials science and engineering of Beijing Institute Of Fashion Technology conducted 4 small experiments on these sunscreens, including UPF value, light pmittance effect, contrast of grain density and titanium content, and four indexes related to sunscreen effect.

It was found that most of the sunscreen clothes were inaccurate, and the sunscreen effect was very different. 4 UPF sunscreens were less than 30, and the sun protection effect was similar to that of ordinary clothes.

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< p > one of them is a fluorescent green candy hat sunscreen sweater purchased from Tmall. It claims to be "genuine sunscreen against UV", "can block 80% of the light passing through", and the actual UPF value is only 27.

Another brand of white shirts selected from consumers is rated 30+, but the actual level is only 20+.

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< p > < strong > can not ignore the air permeability for sun protection effect < /strong > < /p >.

Gong Yan, an associate professor at the school of materials science and engineering, Beijing Institute Of Fashion Technology, said that most of the current sales of sun protection clothing on the market are mostly a marketing concept of business hype. If its UPF value is less than 30, it is almost the same as ordinary a target= "_blank" href= "http://www.91se91.com/" > clothes < /a >, or even some ordinary clothes, because ordinary clothing itself has the function of shielding the sun.

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Besides, P also reminds consumers that the greater the density of clothing material, the more sunscreen. The deeper the color, the higher the UV protection performance.

But we can not simply pursue the sun protection effect, ignoring the breathability of clothing. Some of the sun protection clothing with inferior quality < a target= "_blank" href= "http://www.91se91.com/" > cloth < /a > is too tight, moisture absorption and air permeability are poor, and wearing air tight, it may cover up prickly heat and small rash.

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< p > < strong > visit < /strong > /p >

< p > < strong > many sunscreen clothes are "three noes" products < /strong > < /p >.

< p > experts say qualified sunscreen clothing should be marked with clothing material, execution standard and UPF value and so on. < /p >

< p > in various sales places, the price of sunscreen clothing ranges from 20 yuan to 1000 yuan, most of which are concentrated in 100 yuan.

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< p > the fluorescent green sunscreen shirt bought by Tmall from a shop in Zhejiang has a price tag of 23.98 yuan per second, showing that its monthly sales volume is more than 140 thousand.

However, the sun protection clothing, which claims to be "genuine sunscreen and UV protection", does not see any material and sun protection signs, but it can not even see the implementation standard and UPF value.

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< p > similarly, pure white sunscreen clothing purchased from Fengtai road Tong market does not see any tag tag.

Sunscreen clothes like this without signs can be seen everywhere in many markets.

"Such sunscreen clothes sell very well, and the price is not expensive."

A shopkeeper said.

But when asked by reporters and their SPF, shopkeepers said they didn't understand very well. "They know that they can protect against ultraviolet rays and how much they can wear."

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< p > some brands of sun protection clothing and sunscreen effect are not labeled.

A brand of multi-function ultra-thin sunscreen clothing bought by Van Kok Pin from the company is marked by FZ/T81010-2009 on the tag and UPF value is not indicated.

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< p > Gong Yan, associate professor of materials science and engineering, Beijing Institute Of Fashion Technology, pointed out that sunscreen is mainly against ultraviolet radiation. The current national < a target= "_blank" href= "http://www.91se91.com/" > textile < /a > Product ultraviolet protection standard is "textile UV protection performance evaluation" (GB/T18830-2009), stipulates that when the UPF value of the clothing is greater than 30 and the UVA pmittance is less than 5%, it can be called the anti ultraviolet product.

Therefore, if it is a qualified sunscreen clothing, it should be marked on the tag, clothing material, the implementation of standards for GB/T18830-2009, and UPF value and other information.

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< p > < strong > < Tips > < /strong > /p >

< p > < strong > ordinary people should use traditional sun protection mode < /strong > < /p >.

< p > buy sunscreen, depending on the SPF, and whether it is breathable.

A good sunscreen can not only prevent ultraviolet rays, but also sweat quickly to the surface.

There must be 3 contents on the tag tag for the regular anti ultraviolet products: one is the execution standard of GB/T18830-2009; two is the UPF value 30+ or 50+; three is a reminder that the protective performance of the product may be reduced under the condition of prolonged use and tension or humidity.

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< p > > ordinary people can use traditional sunscreen methods, sunscreen, sunshade, sunshade hat and long trousers.

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< p > attention should be paid to eat less sensitive foods such as coriander, celery, leek and fennel, and eat foods rich in vitamin B, which will help to reduce the harm of ultraviolet rays to the body.

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< p > < strong > experiment < /strong > < /p >

< p > < strong > experimental site: Beijing Institute Of Fashion Technology, School of materials science and engineering, < /strong > < /p >

< p > experimental sample: a "genuine anti UV" Fluorescent Green candy hat sunscreen shirt bought from Tmall; a brand name red skin multifunctional sweater with genuine carmine from online shopping; a pure white sunscreen clothing purchased from Fengtai Rutong commodity market; a white sunscreen shirt used by consumers; an ordinary black T-shirt from home.

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< p > < strong > Experiment 1 < /strong > < /p >

< p > < strong > the thinner the textile texture is, the better it is to prevent sunscreen < /strong > /p >

< p > experimental process: put 3 sunscreen clothes bought by reporters under magnifying glass to show the texture of textiles.

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< p > experimental results: the pure white sunscreen is the most dense, and the density of carmine is the medium, and the fluorescent green is the thinnest.

The experimenter told reporters that in general, the thinner the textile lines, the better the sunscreen effect.

However, summer clothing is too close, but it will cause air tight and not very good.

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< p > < strong > Experiment 2 < /strong > < /p >

< p > < strong > UV penetration and multi sun protection effect < /strong > < /p >

< p > experimental process: turn on the ultraviolet analyzer, and put down a blank sheet of paper.

The 3 outer parts of sunscreen clothing purchased by reporters were analyzed towards the analyzer. They were wrapped and covered to simulate the environment of ultraviolet radiation to see the effect of ultraviolet light pmission.

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< p > results: the experiment showed that the sunscreen of carmine had the most faint light after covering the instrument.

The experiment points out that ultraviolet radiation does not penetrate very much, and its UV protection effect is the best.

The other two fluorescent green sunscreen clothes and pure white sunscreen clothing are more penetrated by ultraviolet rays, and the light exposure is much brighter on the white paper.

Under normal circumstances, consumers can use ultraviolet devices at home to identify small devices.

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< p > < strong > Experiment 3 < /strong > < /p >

< p > < strong > the higher the titanium content, the better the sunscreen effect is < /strong > < /p >

< p > experimental process: the titanium content of 3 sunscreen clothes purchased by reporters was tested by X- fluorescence spectrometer.

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< p > experimental results: after testing, the titanium content of the 3 sunscreen clothing is: carmine, fluorescent green > white, and its sunscreen effect will decrease in turn.

The lab told reporters that titanium is the necessary finishing agent for physical sunscreen.

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< p > < strong > Experiment 4 < /strong > < /p >

< p > < strong > only one sun protection clothing is "worthy of the name" < /strong > < /p >.

< p > experimental process: each sample was cut from a small sample of clothing samples from 5 samples, and then tested by UV visible near infrared spectrophotometer. The wavelength of the sample was controlled between 320nm-400nm, and the UV pmittance was tested.

At the 356nm wavelength, the pmittance of ultraviolet light is displayed, and then the UPF value is calculated.

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< p > experimental results: the experimental personnel introduced that the UPF value is the ultraviolet protection coefficient, the higher the UPF value, the better the ultraviolet protection effect.

In accordance with the recommended national standards, only the UPF measurement value is greater than 30, that is, 30+ is called "sunscreen clothing".

And through the experimental test, 3 declared sunscreen clothing, the actual UPF value is less than 30, no difference from ordinary clothes.

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