When buying a parasol, pay attention to whether there is a label inside the umbrella stating that the umbrella is anti-UV, that is, the umbrella can really prevent ultraviolet rays (ordinary umbrellas are actually not resistant to ultraviolet rays). Of course, there are also dual-purpose umbrellas with both rain protection and UV resistance on the market. Usually the label will be sewn on the inner side of the umbrella in the umbrella, or the anti-UV effect will be marked on its price tag.

Here are a few things to consider when choosing a parasol:

When choosing an umbrella cover, umbrellas with obviously sparse fabrics generally have poor UV resistance, so consumers should buy them carefully.
Due to the shrinkage of the fabric, when buying sunshades, the umbrella surface should be large rather than small.
The color of the fabric is related to the UV protection performance. Under the same conditions, the darker the color of the fabric, the better the UV resistance. In contrast, black, navy blue, and dark green are better than light blue, light pink, and light yellow.
4. Check the protection grade mark carefully before purchasing. The “Assessment of Anti-ultraviolet Performance of Textiles” promulgated by the General Administration of Quality Supervision, Inspection and Quarantine stipulates that only when the UPF (ultraviolet protection factor) is greater than 30 and the UVA (long-wave ultraviolet) transmittance is less than 5%, it can be called anti-ultraviolet products. The standard is “UPF30+”; when the UPF is greater than 50, it indicates that the product has excellent ultraviolet protection performance, and the protection level is marked as “UPF50+”. Consumers should carefully check the protection level label when purchasing, and then choose an umbrella that suits them according to the local sun exposure.

5. Choose brand-name products, and beware of ordinary umbrellas that are imitated by counterfeit anti-ultraviolet umbrellas.

6. The anti-ultraviolet performance can be preliminarily judged according to the fabric properties of the umbrella surface. Generally speaking, cotton, silk, nylon, viscose, etc. have poor UV protection performance, while polyester is better. The polyester-containing fabrics usually used to make umbrellas include satin cloth, Mike cloth, etc. In addition, satin weave has the best anti-ultraviolet performance, followed by twill weave and plain weave. The darker the color, the better.

7. Whether the sunscreen umbrella can prevent ultraviolet rays or not, the texture of the fabric is not the most important thing. The main thing is what kind of technical treatment the manufacturer has done to the fabric. Generally, cotton and linen fabrics have certain anti-ultraviolet properties, but the degree is not strong. Most of the sunscreen umbrellas sold on the market in the past two years were coated with a layer of silver glue on the umbrella surface. This treatment can reflect and block some direct ultraviolet rays. However, the quality of the silver glue is good or bad. The silver glue for sunscreen umbrellas produced by manufacturers with good technical conditions is not easy to fall off, and some cheap sunscreen umbrellas just apply a layer of silver to the umbrella surface in order to make up for it. It faded away.

When the umbrella surface is wet, due to the optical transmission of water, the transmittance of ultraviolet rays increases and the protective effect decreases. Therefore, wet umbrellas are not suitable for UV protection.