Look at the umbrella to buy a sun umbrella

Update:27-10-2018
Summary:

Fabric Density: When the umbrella surface is selected, […]

Fabric Density: When the umbrella surface is selected, the anti-ultraviolet performance of the fabric which is obviously sparse is generally poor, and consumers are cautiously buying.

Umbrella area: Because the fabric has shrinkage characteristics, when purchasing a parasol, the umbrella surface should not be small.

Umbrella color: Under the same conditions, the deeper the color, the better the UV resistance of the fabric: the UV transmittance of the black umbrella is 5%; the ultraviolet transmittance of the navy, red, dark green and purple umbrella is 5% - 10%; green, red, light green, white umbrella UV transmittance of 15% - 20%. So buy a sun umbrella, the anti-UV performance of the dark umbrella surface is better.

Umbrella processing: Most of the sunscreen umbrellas on the market are 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.