Look at the umbrella surface first. When choosing an umbrella surface, pay attention to the fact that the umbrella surface should be complete without holes. The sum of the broken warp and weft threads at the same point on the umbrella surface should not exceed 4 and then choose the color you like. Then pick the umbrella skeleton, first look at the top of the umbrella, the top cap should be tightly fastened, and there should be no looseness; the umbrella pole should be free from rust, and cracks, and bright; Lightweight, and the spring should play a positioning role; the automatic umbrella should close the umbrella reliably, and no loss of control is allowed; the spring performance on the support point of the umbrella bone should be good, and the joints should be firm and shiny. In addition to the common straight-rod and three-fold types of commercially available umbrellas, the anti-ultraviolet umbrella has also introduced a four-fold umbrella, which is more convenient to carry. Umbrella ribs account for a relatively large proportion of the production cost of umbrellas, so you should pay special attention to picking umbrella ribs when buying an umbrella.
Consumers should pay attention to the following points when purchasing UV protection umbrellas:
1. Carefully read the protection grade mark before purchasing. The "Assessment of Anti-ultraviolet Properties of Textiles" promulgated by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China stipulates that only when the UV protection factor is greater than 30 and the long-wave ultraviolet transmittance is less than 5%, can it be called an anti-ultraviolet product.
2. Choose brand-name products to prevent many umbrellas from imitating counterfeit anti-ultraviolet umbrellas.
3. 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, the satin weave has the best anti-ultraviolet performance, followed by twill weave and plain weave. The darker the color, the better.
4. The texture of the fabric is not the most important thing about whether the sunscreen umbrella can prevent ultraviolet rays. The main thing is what kind of technical processing 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 in the market in the past two years are coated with a layer of silver glue on the surface of the umbrella. This treatment can reflect and block some direct ultraviolet rays, but the quality of the silver glue varies. The silver glue of high-quality sunscreen umbrellas is not easy to fall off, and some cheap sunscreen umbrellas just apply a layer of silver to the umbrella surface to make up for it, and the color will fade after several times of sunlight. Sunscreen treatment for light and thin fabrics requires high technical content and high cost. Therefore, cheap ultra-light sunscreen umbrellas sold on the market basically cannot achieve the effect of sunscreen.
Shop UV Sun Umbrellas
On the market of sunscreen products this summer, anti-ultraviolet sun umbrellas are very popular. When choosing an anti-ultraviolet sun umbrella, consumers should grasp its characteristics to pick a good umbrella that is satisfactory from appearance to quality.
1. Look at the appearance. In addition to the previous prints, squares, and solid color patterns, UV-resistant sun umbrellas have launched cartoon patterns, pastel series, and other fashionable designs this summer. The depth of color will not affect the ability to resist ultraviolet rays. Relevant tests have found that the color of the umbrella surface has little effect on the protective effect. Light-colored umbrellas and dark-colored umbrellas have almost the same UVB transmittance and other indicators.
2. Choose the umbrella surface. There are two types of anti-ultraviolet sun umbrellas: glossy and matte. Glossy umbrellas dominate the market, appearing pretty and lively; matte umbrellas are relatively complicated to make and expensive, and look unassuming, giving people a reserved and stable impression.
3. Pick the ribs. In addition to the common straight rod type and three-fold type, the anti-ultraviolet umbrella has introduced a four-fold umbrella, which is more convenient to carry. Umbrella ribs account for a relatively large proportion of the production cost of umbrellas, so you should pay attention to picking umbrella ribs when buying an umbrella.