When many people buy outdoor umbrellas, they want to know how the sunshade is radiation-proof. The effect of the wide umbrella anti-UV effect, the hub depends on its UPF value. What is the UPF value? The so-called UPF value refers to the ratio of the average effect of the ultraviolet radiation calculated when the skin is unprotected to the average effect of the ultraviolet radiation calculated when the skin is protected by the fabric.
As long as the UPF value is greater than 40, the transmittance of UVA is less than 5% is a qualified parasol. That is to say, regardless of the price of the parasols sold, as long as the UPF and UVA on the certificate meet the requirements, and the product implementation scale, article number, specifications, fabrics and composition scales can be purchased according to their own needs.
In addition, according to the nature of the fabric, it is also possible to initially identify how the UV protection effect is. Under normal circumstances, cotton, silk, nylon, viscose and other anti-UV functions are poor, while polyester is relatively good. Need to be reminded that there is a disappointment to use parasols as umbrellas. Because the rain has been eroding the parasol surface for a long time, it will affect the UV protection function of the parasol. Moreover, when the outdoor umbrella is dirty, it is best to use a soft brush to gently wipe it, but it is not suitable for hand washing or it will affect the UV protection effect of the umbrella.
Welcome visit www.chinaoutdoorfurniture.com for more outdoor umbrellas.