In terms of fabric, silk, cotton and nylon have poor effect, while polyester has good effect. In terms of weaving method, satin fabric has the best UV protection performance, and the darker the color, the more sun protection.
Under the same conditions, the darker the color of the fabric, the better its UV resistance. In contrast, black, navy blue and dark green have better UV resistance than light blue, light pink and light yellow.
The UV transmittance of black umbrella is, that of navy blue, red, dark green and purple umbrella is to, and that of green, light red, light green and white umbrella is to.
To sum up, we know that the anti ultraviolet performance of dark umbrellas is better. I hope it will be useful to you!