Umbrellas are not shaded, solar dermatitis is hard to prevent
The summer is coming, the hot sun is in the head. Some readers who think that the sun protection measures are doing very well still have solar dermatitis. What is going on?
Ms. Jin, who is waiting in line at the Nanjing Hospital of Integrated Traditional Chinese and Western Medicine, told the reporter: “I recently felt that the outdoor temperature is higher. I have specially prepared a new parasol, but the skin is still getting darker and darker, on my hands and arms. There are a lot of small cockroaches, a little itchy, and I don’t think the umbrellas are used at all! It’s really hard to prevent!â€
The clinic's beauty attending physician Liu Mingzhu told reporters that solar dermatitis is related to personal physique, and people with weak constitution, fair complexion and sensitivity are more likely to be recruited.
The longer the sun is exposed, the more severe the allergic reaction, and the itching of the skin will last from 24 hours to 48 hours or even longer. To prevent solar dermatitis, parasols are an essential sunscreen "weapon", but if it is not right or inappropriate, it will be counterproductive.
Pick a parasol and look at the shadow on the ground.
Du Changming, a dermatologist at the Nanjing Hospital of Integrated Traditional Chinese and Western Medicine, said that the umbrella surface is the key to measuring the anti-UV effect. Cotton, silk and nylon fabrics are not as good as polyester. Umbrella fabrics should be selected from fabrics that are tight, satin fabrics, and then twill and flat; the darker the fabric, the better. The umbrella surface should not be small.
Experts suggest that when picking an umbrella, you may wish to open the umbrella to see the shadow on the ground. The shadow is darker and better. One of the umbrellas sold in the market is coated with silver glue to block ultraviolet rays. Although the protective effect of the silver rubber surface is good, it is easy to turn black after being exposed to sunlight. In fact, the silver glue coating does not affect the sun protection effect inside or outside. It is best to choose silver glue inside, so it is not easy to fall off.
Cheap Moss umbrellas don’t be used as umbrellas
Many readers often hear from the business that the umbrellas can prevent ultraviolet radiation, and the price is only different from the brand. Does this argument make sense? According to experts, a qualified anti-UV umbrella, even with the most common fabric, costs about 20 yuan, many cheap umbrellas can only block part of the sun, let alone UV protection. According to the international standard in "Assessment of UV Protection Performance of Textiles", when the fabric UPF (UV protection coefficient) value is greater than 30 and the transmittance is less than 5%, it can be called "UV protection product".
Dr. Du Changming specifically reminded that rainwater has a corrosive effect on the sunscreen coating. In order to maintain the sun protection performance of the parasol, it is best not to use the umbrella for rain protection. If the surface of the umbrella is dirty, you can use a soft brushing tool to gently wash the water, but you can't wash it by hand. The number of cleanings should not be too frequent, otherwise it will affect the sunscreen effect.
(Editor: Xu Xiaoyu)
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