UV Absorbers: Protecting Against Ultraviolet Rays in Umbrellas and Sunglasses

Awareness Varies — UV Absorbers Are NeededUV Absorber　　
Do you know what kind of sun umbrella providesUV protection? A reporter randomly interviewed 10 citizens on the street; surprisingly, 7 said they had no idea, 2 mentioned something related to SPF, and only 1 said they knew how to identify and choose.

In some large shopping malls, the instructions for sun umbrellas list fabric, manufacturer, and SPF, and offer after-sales warranty service. When it comes to productUV protection levels, merchants have a fair understanding of their products' sun-protection function: 'These sun umbrellas are marked with an SPF and can block UV rays; besides sun protection, they can also be used as rain umbrellas.'

However, leaving the big malls, the reporter came to some sun-umbrella shops (stalls); when it came toUV protection, most merchants were vague. Take the 'Paradise' umbrella, which follows the 'mass market' route—although it's everywhere on the streets, merchants couldn't state a specific SPF and were ambiguous about how to identify UV-protection functionality.

Whether a sun umbrella can protect against the sun depends on its SPF~~~UV protection factor. According to the standard 'Assessment of UV Resistance of Textiles,' a product can be called a 'UV-protective product' only when its UPF (UV protection factor) is greater than 30 and its UVA (long-wave UV) transmittance is less than 5%.

Industry insiders emphasize that when purchasing sun umbrellas, consumers should carefully check the protection-grade label; when the label reads 'UPF50+', i.e., UPF greater than 50, it indicates the productUV has excellent protection performance.

Materials such as cotton, silk, nylon, and viscose have poorUV protection performance, while polyester is better. Fabrics commonly used for umbrellas include silver-coated, satin, pearl-coated, pongee, and TC cloth. UV-protection performance is best for satin weave, followed by twill and plain weave.

Some sun umbrellas have a layer of sunscreen silver powder coated on the surface, which increases the fabric's reflection and scattering of light; this method has always been popular because of its good effect. Also, the darker the fabric color, the better its resistance toUV rays—black, navy, and dark green have better UV resistance than light blue, light pink, and light yellow. There is a type of sun umbrella that directly blends UV absorber into the fabric.

For sunglasses, a medium-depth UV-absorber tint is best. Brown tints have the best function of absorbing UV and infrared, making eyes less fatigued. Gray tints can completely absorb infrared and most UV rays. Green tints also absorb UV and infrared fairly well, but sometimes the colors of scenes change after passing through green lenses. Amber tints—suitable for sports—can effectively increase contrast and absorb blue light, enhancing...Combating UV Rays Is a Technical Matter — The Powerful Efficacy of UV AbsorbersUV

protection factor. According to the standard 'Assessment of UV Resistance of Textiles,' a product can be called a 'UV-protective product' only when its UPF (UV protection factor) is greater than 30 and its UVA (long-wave UV) transmittance is less than 5%.
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