Most sun protective clothing does not indicate the SPF. Can it really protect you from the sun?
Lemon yellow, apple green, sky blue, watermelon red... Igou reporters have visited many shopping malls and stores recently and found that almost every container specializing in outdoor products has colorful sun protection clothing, and even There are stalls selling sun protection clothing at the subway entrance. Most sun protection clothing is as thin as a cicada and can be easily folded and placed into a wallet-sized cloth bag. However, the reporter found that the materials of these sun protection clothes were very thin and did not have any sun protection signs or even trademarks.
Compared with the popularity that can be seen everywhere, online sales are even more prosperous. On July 20, a reporter from iGo entered "sun protection clothing" on Taobao and found 996,408 related items, and the monthly transaction record of an online store reached 128,663 items. Most of the products are labeled as "UV protection, sun protection, transparent, genuine", and some are also labeled as "special sun protection fabric", "polyester fiber", etc. The sun protection clothes sold in these online stores are not only available in seven or eight colors, but also in lace, chiffon and other fabrics. They are also divided into long and short styles, with prices ranging from a few yuan to several hundred yuan, among which the most popular These are low-priced sun protection clothes that cost tens of yuan.
?Sun protection clothing first became popular in the United States in 2007, and then entered China. At first, it was mostly used in outdoor products, and was rarely used in ordinary clothing. Later, it became favored by many girls. ?
?The main function of sun protection clothing is to prevent direct exposure to ultraviolet rays from the sun, and its function is the same as that of a parasol.
Principle of sun protection
?Sun protection clothing is made of high-quality polyester fiber material. The sun protection coefficients of various fibers are: polyester fiber gt; cotton fiber gt; rayon and silk.
Most of the fabrics of sun protection clothing are anti-UV fabrics with sun protection additives added. Some sun protection fabrics use ceramic micropowder combined with fibers to increase the reflection and scattering of ultraviolet rays on the surface of the clothing and prevent ultraviolet rays from penetrating the fabric. Damage to human skin.
Sun protection clothing is made of fabric that can protect against ultraviolet rays, and a layer of sun protection coating is applied to the inner layer of the clothing, just like a sun umbrella. A piece of sun protection clothing can block 95% of ultraviolet light.
When wearing clothing with anti-UV function in hot seasons, sweat will be quickly transferred from the skin surface to the fabric surface, and will dry quickly, so you will no longer be troubled by sweat.
Ultraviolet rays are the main cause of premature skin aging, causing photoaging of the skin and even skin cancer.
Sun protection standards
"Evaluation of UV Protection Performance of Textiles" stipulates that only when the UPF (ultraviolet protection factor) of the product is greater than 30, and the UVA (long-wave ultraviolet) transmittance When the value is less than 5, it can be called an "UV-resistant product." These two conditions are indispensable. This is a measure of whether a product is a "UV protection product."
?Ultraviolet protection products should be marked with the following three aspects on the label: the number of this standard, that is, gb/t18830; UPF value: 30 or 50; long-term use and in stretched or wet conditions In this case, the protective properties provided by this product may be reduced.
Clothes made of regular sun protection fabrics will have clear UV protection factors marked on their clothing labels.
Are sun protection clothes sun-protective?
? Regular sun protection clothes require special treatment and are more expensive. Low-priced sun protection clothes are mostly gimmicks, and most of them only play the sun protection role of ordinary long-sleeved clothes.
The professional protective clothing used by special groups such as astronauts is very expensive and can protect against ultraviolet rays and radiation.
Good sunscreen fabrics can not only protect against ultraviolet rays, but also quickly guide sweat to the surface of the fabric and dry quickly; while inferior fabrics have poor moisture absorption and poor air permeability, making people feel uncomfortable or even wet when worn for a long time. Prickly heat.
The sun protection effect of ordinary fabric is better than that of any sunscreen, and the sun protection effect of sun protection fabric is better than that of ordinary fabric.
However, the sunscreen effect of fabrics added with sunscreen additives will be reduced after repeated washing. Among ordinary fabrics, in terms of color, the darker the color, the higher its UV protection performance, such as black; in terms of texture, among chemical fibers, polyester is better than nylon, and nylon is better than artificial cotton and silk.
Most sun protection clothing does not indicate the sun protection index
A reporter from iGo found in Haiyin Dongchuan Sports City that only a few brands of sun protection clothing, such as KAILAS, have sun protection index. UV label. According to the clerk, only those who have passed the UV protection index inspection of the National Quality Supervision Bureau can obtain this label. The label is marked with the following three aspects: the number of this standard, that is, GB/T18830; UPF value: 30 or 50; The protective properties provided by this product may be reduced with long-term use and when it is stretched or wet. iGo reporters subsequently visited many stores and found that most sun protection clothing did not have UV protection labels. When the reporter asked these sellers what the sun protection index of the sun protection clothing was and why there was no ultraviolet protection label, the sellers were vague and said that they did not know very well.
Through the Wangwang chat tool, the reporter contacted several Taobao shop owners selling sun protection clothing. When asked how high the SPF of sun protection clothing is, most store owners give vague answers. When asked about the material used in the sun protection clothing, the shop owner couldn't explain why. He only said that the effect was very good. Ms. Peng, who had worn sun protection clothing for several days and returned from a beach vacation, told the author: "The sun protection clothing feels no different from wearing ordinary clothes. It has a shading effect, but the sun protection is not obvious, and I still get a lot of darkness."
How to choose sun protection clothing?
It is understood that the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China stipulated in the "Evaluation of UV Protection Performance of Textiles" promulgated in 2003: Only when the UPF (ultraviolet protection factor) of the product is greater than 30, and UVA ( Only when the transmittance of long-wave ultraviolet rays is less than 5 can it be called an "anti-ultraviolet product". These two conditions are indispensable. This is a measure of whether a product is a "UV protection product."
? Anti-UV products should be marked with the following three aspects on the label: the number of this standard, that is, GB/T18830; UPF value: 30 or 50; long-term use and in stretched or humid conditions In this case, the protective properties provided by this product may be reduced. According to industry insiders, clothing made of regular sunscreen fabrics will have a clear UV protection factor on the clothing label. The label clearly indicates the clothing material, UPF index and other relevant parameters.
In addition, long-term washing or stretching may cause the sun protection performance of the clothes to decrease. In this case, it is necessary to replace or re-add additives to the clothes. For specific methods, refer to the relevant instructions of the product.
?Experts from the Testing and Standards Professional Committee of the China Textile Engineering Society said that not all sun protection clothing currently sold on the market can provide "sun protection" (anti-ultraviolet), even many famous brands.
Because the current popular styles are too thin and light, they do not meet the requirements of the GB/T18830 national standard. Ordinary dense, dark-colored clothing can meet the national standard UV resistance requirements. The principle of sun protection is mainly to block ultraviolet rays that are harmful to the human body. When buying clothing, just buy thicker, darker colors and denser structures. For example, ordinary T-shirts with 220 grams/square meter have extremely high UV resistance, and the UPF can reach more than 100, which is much higher than Requirements of GB 40.
What color clothes are the most sun-protective?
Wearing red clothes is good for health
? For every 1 decrease in ozone in the atmosphere, the ultraviolet rays hitting the ground will increase by 2, and The incidence of skin cancer increases by about 4%.
Wearing red clothes in the sun can reduce the damage of ultraviolet rays to the skin. This is because ultraviolet rays are the rays with the shortest wavelength that are farthest from the red light spectrum among the seven colors of the sun. They are easily absorbed by the red visible light with the longest wavelength. Therefore, wearing red clothes can absorb and filter out more of the sun's ultraviolet rays, thereby reducing the damage of ultraviolet rays to the skin.
Children wearing red clothes in summer are the most sun-protective. Red has the longest wavelength and can absorb a large amount of ultraviolet rays in sunlight, while other colors are relatively weak, so wearing red clothing can block ultraviolet rays and prevent sunburn.
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