When you buy a parasol, you should pay attention to whether there is a label in the umbrella that the umbrella is anti-UV, that is, the umbrella can really prevent UV (the general umbrella is not resistant to UV). Of course, the market also sell both rain and anti-UV dual-use umbrella. Usually the label will be sewn in the umbrella by the inside of the skeleton, or in its price tag on the marked anti-UV effect.
In the choice of umbrella when the reference to the following points:
1, before the purchase should carefully look at the protection level mark. AQSIQ promulgated the "anti-ultraviolet performance of textiles assessment," provides that only UPF (UV protection factor) is greater than 30, and UVA (long-wave ultraviolet) transmittance of less than 5%, can be called anti-UV products, protection level Standard "UPF30 +"; when the UPF is greater than 50, indicating that the product excellent UV protection, protection level identified as "UPF50 +". Consumers in the purchase, should carefully check the protection level logo, and then according to the local sun situation, choose their own umbrella.
2, select brand-name products, to mention the general umbrella just fake anti-UV umbrella.
3, according to the nature of the umbrella fabric to determine the initial anti-ultraviolet performance. In general, cotton, silk, nylon, viscose and other anti-ultraviolet performance is poor, and polyester is better. Usually used to make umbrella with polyester fabric colored satin, Mike cloth and so on. In addition, the anti-ultraviolet performance to satin fabric the best, followed by twill, plain, the color the deeper the better.
4, sunscreen can not prevent UV, fabric texture is not the most important, the main manufacturers are on what kind of fabric to do the technical treatment. General cotton, hemp texture of the fabric itself has a certain anti-UV performance, but the degree is not strong Bale. The first two years of the market sales of sunscreen umbrella is coated with a layer of silver glue on the umbrella, this treatment can reflect and block some of the direct ultraviolet light. But the quality of silver glue is good and bad, good technical conditions manufacturers of sunscreen umbrella silver glue is not easy to fall off, and some cheap sun umbrella in order to count, just to the umbrella painted a layer of silver, after several sunshine It fell off the color.