2023-06-26 07:51:55
Summer is here, and it’s time to open a parasol. Many boys are too lazy to hold a parasol, but now that the weather is getting hotter and hotter in summer, 99% of the ultraviolet rays may be lost if you have an umbrella or not! The Japanese government has actively encouraged men to carry parasols. Easier said than done, you may worry regarding how to choose an umbrella. In fact, there are also knowledge in picking an umbrella. If you choose the wrong parasol, it may become darker and darker! The following days will teach you how to pick a parasol.
Parasols can block 99% of ultraviolet rays
Zhu Bailing, Director of the Heat Stroke Prevention and Control Center of the Armed Forces General Hospital, once cited a 2013 study in the world’s authoritative medical journal “JAMA Dermatology”, pointing out that as long as you hold a parasol, you can block 77-99% of ultraviolet rays, which is a very effective sun protection method.
How to choose a parasol?
Many people don’t know how to choose a parasol. There are three principles to follow when choosing a parasol:
1. Aim at the sun and pick up an umbrella
Open the umbrella, point it at the sun or a strong light source, and observe the amount of light passing through the parasol. The less light transmitted, the higher the fabric density and the better the sunshade effect. Standing directly under the sun with an umbrella, the umbrella with a good sunshade effect can completely block the light and feel very cool and comfortable.
2. Observe the outer layer of the umbrella
Look directly at the gloss of the umbrella surface. The more obvious the gloss, the denser the umbrella surface is, and the better the sunshade. It is recommended to choose an umbrella processed with silver glue, which can improve the sunshade effect.
3. Observe the inner layer of the umbrella
It is also important to pay attention to the inner layer of the parasol. The inner layer is black and the outer layer of silver glue has better sun protection effect. If the inner layer of the umbrella surface is light-colored, it may reflect the ultraviolet rays of the ground, causing sun exposure holes and easy tanning.
According to the Japanese media, the color matching of the inner and outer layers of the umbrella has different effects:
1. Dark color both inside and outside: it is the most effective to prevent ultraviolet radiation. The surface can block the ultraviolet radiation from above, and the inner layer can absorb the ultraviolet radiation, so as not to reflect and shine on the umbrella holder. But the disadvantage is that the umbrella surface will absorb a lot of heat, and the umbrella holder will feel hot and dry. 2. Both inside and outside are light-colored: this kind of parasol surface will reflect ultraviolet rays, and a bright umbrella will make the person holding the umbrella look better. But the disadvantage is that the inner surface of the umbrella will reflect the ultraviolet rays on the ground, which is easy to make people tan. 3. Shallow on the outside and deep on the inside: the outer umbrella surface can effectively reflect ultraviolet rays, while the inner umbrella can reduce the heat reflected from the road surface. This umbrella is also a good choice. 4. Deep on the outside and shallow on the inside: It is suitable for mild climates in spring or autumn, but the effect of reflecting ultraviolet rays is poor. The umbrella surface can absorb the ultraviolet rays from above, but the parasol is easy to absorb heat; the inner umbrella will reflect the ultraviolet rays from the ground, which is easy to make people tan.
The parasol is light and easy to carry, and it is more resistant to strong winds
In addition to the anti-sun performance of the parasol itself, it is also very important whether it is light and easy to carry. For example, a folding umbrella that can be folded in a bag is better than a large parasol, which will increase the usage rate. If you can add the advantages of anti-strong wind, it will be a big plus.
A little reminder for the day of treatment: sun protection in winter
In winter when the sun is not so harsh, the number of people holding parasols is greatly reduced. In fact, this is wrong. Don’t underestimate the ultraviolet rays in winter. This is because ultraviolet rays that can penetrate the atmosphere and cause harm to the human body are divided into “UVA” and “UVB”. The former accounts for regarding 95% of ultraviolet radiation, and can penetrate clouds, water vapor, and even glass to reach the indoor environment. The impact of UVA on the skin is not divided into four seasons. As long as it is exposed to sunlight, it will affect the skin and accelerate skin aging. Therefore, sun protection is not only necessary in summer, but also in autumn and winter!
Treatment day extension recommendation:In addition to sunscreen, there are these methods of sun protection in summer!There is a tea drink and three points to prevent sunburn
Have a good chat and heal your healthy life
References:Health Nine Nine Network
Image source: 123RF
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