In the summer of color, many people working outdoors use parasols. However, there are many types and types of parasols, so how do you choose a parasol that can protect you from the sun? What are the precautions for parasols?
There are many materials and types of sunshade available on the market, including nylon, satin, cotton cloth, oil paper, etc., single or double layer of the umbrella surface, with or without coating (black glue or silver glue). In general, umbrellas can protect against sun, but different umbrellas have somewhat different abilities due to differences in materials and purposes.
Umbrellas with a sun protection function are usually marked with UV protection, and even the umbrella's sun protection index UPF value. The higher the UPF value of the parasol, the stronger the ability to block ultraviolet rays. Generally speaking, the UPF30-45 parasol is sufficient for sun protection. If you only have ordinary umbrellas at home, or don't know how the sunscreen function of the umbrella, it is recommended to choose dark, densely woven, double-layer, coated umbrellas for sunshade, its sunscreen ability is relatively strong.
For those who are particularly sensitive to ultraviolet rays, the simple use of a parasol may not be enough. It is also necessary to isolate other ground, environmental scattering, reflected light, etc. Therefore, every year from March to May, when the intensity of ultraviolet rays changes sharply, such patients need to do a good job of wearing protective masks and long-sleeved clothes in advance to prevent the occurrence of ultraviolet allergies.
