The first thing you should pay attention to when buying parasols is whether there is a volume label in the umbrella to indicate that the umbrella is UV resistant, that is, if the umbrella can really prevent UV rays (because the general umbrella is not resistant to UV rays). Of course, dual-use umbrellas with both rain and UV resistance can also be seen on the market. Usually the label is sewn in the umbrella on the inside of the skeleton, or it is marked on its price tag with anti-UV effect.
In addition, pay attention to the following points when purchasing parasols:
1. When looking at an umbrella surface, the UV protection performance of umbrellas that are obviously sparse in fabric textiles is generally poor and should be purchased with caution.
2. Fabrics generally have the characteristic of shrinking. When purchasing umbrellas, the umbrella surface should not be small.
3. The color of the fabric is related to the UV protection performance. Under the same conditions, the darker the fabric, the better the anti-ultraviolet performance. In comparison, black, navy, dark green, light blue, light pink, light yellow and other anti-ultraviolet properties are better.
4, before purchase should carefully look at the protection class mark. According to the “Accreditation of UV Protective Properties of Textiles†promulgated by the General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ), only UPF (UV protection factor value) is greater than 30, and UVA (long-wavelength UV) transmittance is less than 5%, it can be referred to as UV protection product. The standard is “UPF30+â€; when UPF is greater than 50, it indicates that the product has excellent UV protection performance and the protection class is identified as “UPF50+â€. When consumers purchase, they should carefully check the protection level identification, and then according to the local sun conditions, choose the right umbrella for them.
5, choose brand-name products, many ordinary umbrellas available in the market to counterfeit anti-ultraviolet 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 performance, but polyester is better. The polyester-containing fabrics that are commonly used for making umbrellas are colored lining cloths, micro cloths, and the like. In addition, the best anti-ultraviolet properties are satin fabrics, followed by diagonal and plain weave, and the darker the better.
7, sun protection umbrella can not prevent UV, fabric texture is not the most important, the main thing is what the manufacturers do on the fabric of the technical treatment. General cotton, linen texture itself has a certain degree of UV protection, but performance is not so strong. Sun umbrellas sold on the market in the past two years were mostly coated with a layer of silver glue on the surface of the umbrella. Such treatment can reflect and block some direct ultraviolet rays. However, the quality of silver plastic is also good and bad, good silver plastic is not easy to fall off, and some cheap sun umbrellas in order to make up for the amount of money, just to the umbrella surface coated with a layer of silver, after a few sun shining off.
8. When the umbrella surface is wet, the transmittance of ultraviolet rays increases due to the optical conduction of water, so that the protective effect is reduced. Therefore, wet umbrellas should not be used for UV protection.
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