Today and tomorrow (8-9)
Sunny, temperature 28°C-37°C
This week, Changsha is dominated by sunny and hot weather
The maximum temperature is around 37°C
Until the 10th, the deputy high control
From the 11th to the 13th, the deputy high retreated
Increased cloud system with showers or thundershowers
14th, sunny
As soon as the weather is hot, everyone starts to buy summer sun-protective clothes. Many people may think that wearing white clothes is the best way to protect from the sun, but this is not the case: red clothes are the best protection from the sun, followed by black and navy blue.
Let's start with a little experiment:
With an outdoor temperature of about 32°C, spread the clothes on a straw mat and let the sun shine for 20 minutes.
The results showed that the thermometer under the red suit showed the lowest number at 36.5°C. The thermometer under the white and black clothes showed the numbers 37.1°C and 36.9°C, respectively.
It has long been believed that dark clothes absorb heat quickly, while white clothes absorb heat slowly, so for a short period of time, light-colored clothes will be cooler. Light-colored clothing can reflect some ultraviolet rays, but the ability to absorb ultraviolet rays is not good, while red light has a longer wavelength and can absorb a lot of ultraviolet rays in the sun, so if you spend a little more time in the sun, it will be cooler to wear red clothes.
Seemingly light chiffon skirts and quick-drying clothes are not cool
Chiffon skirts, chiffon sweaters, quick-drying clothes...... This seemingly light and cool material is not "cool" at all. In summer, the human body sweats a lot, although the chemical fiber cloth is relatively light and thin, but the water absorption and air permeability are poor, and it is difficult for the skin to dissipate heat through sweat evaporation.
In contrast, natural fibers such as cotton, linen, and silk are the first choice for high temperature days, and silk is skin-friendly, lighter, and cooler to wear; Cotton clothing absorbs sweat and has good breathability; The linen material has large pores, good air permeability and water absorption.
The "sun protection value" of a garment is not just about the color
The UV protection of clothes depends not only on the color, but also on the material of the clothes. The sun protection value of cotton clothes is 15~40, the sun protection value of light-colored polyester fiber clothes is 7~10, and the sun protection value of light-colored knitted clothes is 4~9. If you want UV protection, it's best to wear dark cotton clothing.
Source│People's Daily, Changsha Meteorology
Editor│Cao Shanshan first trial│Dai Kaiqin second trial│Yuan Jintao third trial│Su Tiantian│Kaifu District Rong Media Center submission mailbox丨 [email protected]
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