FunDo beach umbrellas protect us from the sun?

Do beach umbrellas protect us from the sun?

Beach umbrellas do not eliminate all solar radiation. As a team of researchers from the University of Valencia (UV) has just demonstrated, 34% of the total ultraviolet radiation is filtered through the umbrellas .

To carry out the work, which was recently published in the journal Photochemistry and Photobiology , the team placed an ultraviolet sensor at the base of a blue and white painted canvas umbrella, 80 cm in radius and 1.5 meters high. The results show that the canvas has a very high capacity to absorb radiation, "with only 5% transmissivity", but that does not prevent diffuse UV radiation from seeping through the sides.

In addition, using various configurations of sky, ground and umbrella, the researchers have been able to simulate the real situation of people, who do not always lie down under the parasols, but can get up, sit or stand.

To avoid the harmful effects of UV rays, experts recommend using, in addition to beach umbrellas, hats with a brim of more than 7 cm, goggles with protection and sun creams. They also advise reducing the exposure time and avoiding the hours when the sun is highest (between 12 noon and 4 p.m. local time).

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