Experts: 1. When selecting umbrellas, the UV resistance of umbrellas that are obviously sparse is generally poor. 2, due to the characteristics of shrinking fabrics, when purchasing umbrellas, the umbrella should not be small. 3, the color of the fabric and UV protection performance. Under the same conditions, the deeper the fabric, the better the UV resistance of the fabric. In contrast, black, navy, dark green, light blue, light pink, light yellow and other anti-ultraviolet properties are better. 4. When the umbrella surface is wet, the transmittance of ultraviolet rays increases due to the optical conduction of water, and the protective effect decreases. Therefore, wet umbrellas should not be used for UV protection. 5. In the space where we live, ultraviolet radiation will radiate from all angles to the human body. Anti-UV parasols can only block the ultraviolet rays radiating from the top of the head to the umbrella surface.
According to the national standard "evaluation of textiles against ultraviolet radiation", if the UPF (Ultraviolet Protection Factor Value) is greater than 30, and the UVA (Longwave Ultraviolet) transmittance is less than 5%, it can be referred to as a UV protection product. The protection class is " UPF30+”; When UPF is greater than 50, it indicates that the product has excellent UV protection, and the protection class is identified as “UPF50+”. When consumers purchase, they should carefully check the protection class mark.
Rong Yue also reminded consumers that in the case of ordinary umbrellas on the market posing as UV umbrellas, consumers choose brand-name products more at ease. Secondly, according to the nature of the fabric, it can also be initially identified. In general, cotton, silk, nylon, viscose and other UV protection performance is poor, and polyester is better.
How to identify whether UV protection
When buying an umbrella, pay attention to whether there is a volume label in the umbrella to indicate that the umbrella is UV-resistant, that is, this umbrella can really prevent UV rays (in general, the umbrella can't resist UV rays). Of course, there are dual-use umbrellas that are both rain-proof and UV-resistant. Usually the label will be sewn in the umbrella on the inside of the skeleton, or it will have anti-UV effect on its price tag.
Why are the same umbrellas, the price difference will be so large (20-500 yuan)?
Some umbrellas have high prices and are related to fabrics, handles, accessories, umbrella frame materials, manufacturing processes, packaging, and brand effects of umbrellas. UV resistance is not a major factor in pricing. Taking fabrics as an example, fabrics used to make umbrellas in the market are not only silver pastes and pearl glues in the past, but also new fabrics such as mouth fabrics, silver-onion fabrics, and impact fabrics. These new fabrics can not only Resists UV rays and has a good visual effect. However, for the anti-ultraviolet effect, the relatively inexpensive high-quality silver glue is actually the best.