There are more and more news about sunscreen. Many people dont know what kind of sunscreen is called sunscreen.The next editor will introduce: What kind of sunscreen is called sunscreen?What are the techniques of sunscreen selection?
What kind of sunscreen?
There is a certain threshold for becoming a real "anti-ultraviolet product". According to the national standard GB/T 18830-2009 "Evaluation of Textiles and UV resistance", its effect effect must be achieved:
UPF> 40, and T (UVA) AV <5%
UPF is ultraviolet protection factor.It is calculated by the ratio of the average effects of ultraviolet radiation when the skin is not protected and the average effect of ultraviolet radiation during fabric protection when the skin is not protected.Simply put, UPF40 means that 1/40 UV rays can pass through fabrics; UPF50, that is, 1/50 UV rays can pass the fabric through fabrics.The higher the UPF, the better the fabrics protection of ultraviolet rays.
T (UVA) AV refers to the transmission rate of UVA (long waves).
The above standard translation is that a real sunscreen can only have at most 1/40, that is, 2.5%of ultraviolet rays can pass, and the transmission rate of UVA is less than 5%.
The formal sunscreen and sunscreen will have related signs of UPF and T (UVA) AV.Only by meeting the above standards can your sunscreen be considered a qualified product.
What are the techniques of sunscreen selection?
1. Look at the value.That is, UPF> 40, and T (UVA) AV <5%is the "anti -ultraviolet product".
2. Look at the label.my country ’s“ Textile Products Acknowledging UV performance Evaluation ”stipulates that UV-proof products should be marked with the standard number of the standard, that is, GB/T 18830-2009; in addition, when 40 <UPF & Le; 50, it is marked as UPF40+.When UPF> 50, it is marked as UPF50+; and it is necessary to indicate that the protection provided by the product may be reduced in the case of long -term use and stretching or humidity.
3. Look at the material.Generally speaking, polyester fiber, nylon> artificial cotton and silk on the sun protection effect; in addition, the fine and tight fabric structure should be better than loose materials; in terms of color, dark colors> light, color> white, beige, light yellow.
4. Finally, please select a professional sunscreen brand.This is very important. Please search for specific brands.

Related tags： Apparel