In the hot weather, the sun is sinister, and umbrellas and sunscreens are a must for Ms. Amy. However, there are a lot of sunscreen umbrellas on the market, different prices and different materials. How can we pick a good umbrella?
Selection of parasols
When buying a parasol, pay attention to whether there is a label in the umbrella that the umbrella is anti-UV, that is, the umbrella can really prevent ultraviolet rays (the general umbrella can not resist ultraviolet rays). Of course, there are also dual-use umbrellas that are both rain-proof and UV-resistant. Usually the label will be sewn in the umbrella inside the frame, or it will be marked with anti-UV on its price tag. Parasols should refer to the following points when choosing a parasol:
1. When selecting the umbrella surface, the anti-ultraviolet performance of the umbrella which is obviously sparse in the fabric is generally poor, and the consumer carefully purchases it.
2. Because of the shrinkage characteristics of the fabric, when purchasing a parasol, the umbrella surface should be large and not too small.
3. The color of the fabric is related to the UV protection properties. Under the same conditions, the darker the color of the fabric, the better the UV resistance. In contrast, black, navy, dark green, lighter blue, light pink, light yellow and other UV-resistant properties are better.
4, should carefully check the protection level mark before purchase. The "Assessment of UV Protection Performance of Textiles" promulgated by the General Administration of Quality Supervision, Inspection and Quarantine stipulates that only UVF (UV protection coefficient) is greater than 30, and UVA (long-wave ultraviolet) transmission rate is less than 5%, it can be called UV protection products, protection grade The standard is “UPF30+â€; when UPF is greater than 50, it indicates that the product has excellent UV protection and the protection rating is “UPF50+â€. Consumers should carefully check the protection level logo when purchasing, and then choose the umbrella that suits them according to the local sun exposure.
5, choose brand-name products, beware of ordinary umbrellas to fill the fake anti-UV umbrella.
6. The UV protection performance can be preliminarily judged according to the fabric properties of the umbrella surface. In general, cotton, silk, nylon, viscose, etc. have poor UV protection properties, while polyester is preferred. Polyester fabrics commonly used for umbrellas are satin cloth, mcbike, and the like. In addition, the anti-UV performance is best in satin fabric, followed by twill and plain, and the deeper the color, the better.
7, sun protection umbrella can not prevent ultraviolet light, fabric texture is not the most important, the main manufacturer is what kind of technical treatment of the fabric. Generally, cotton and linen fabrics have certain UV protection properties, but the degree is not strong. Most of the sunscreen umbrellas sold in 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 silver glue is good or bad. The sunscreen umbrella silver glue produced by the manufacturers with good technical conditions is not easy to fall off, and some cheap sun protection umbrellas are used for the purpose of filling the umbrella surface, only after applying a few times of sunlight. It was lost.
8. In the case of wet umbrella, due to the optical conduction of water, the transmittance of ultraviolet light increases and the protective effect is reduced. Therefore, wet umbrellas should not be used to protect against UV rays.
Thermometer can measure sun protection index
If you want to check the UV protection quality of the umbrella, there is an easy way: open several umbrellas of different materials, put a thermometer of the same type inside and outside each umbrella, and observe the inside and outside of the umbrella after 10 minutes of exposure. The difference of the thermometer, if the internal and external thermometers are large, indicating that the umbrella's heat insulation and UV protection function are good, otherwise the quality is not good.
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