和防晒霜一样,遮阳伞也有紫外线防护系数(UPF)等级,用于表明阻挡紫外线效果的好坏。紫外线是由太阳散发的有害射线,对于皮肤有一定的危害,可能导致轻微晒伤,甚至导致皮肤癌和白内障。一把有UPF 30+标识的遮阳伞,能穿透它的紫外线不高于三十分之一。根据国家标准,只有UPF 30+和紫外线穿透率不低于5%的材料,才能算得上是防紫外线产品。日常生活中,可以选择UPF 30+或防晒系数更高的遮阳伞。但是,根据综合信息网站Buzzle.com的建议,如果在户外停留时间较长,应该选择防晒系数至少为UPF 50+的防紫外线伞或遮阳伞。
2. Fabrics matter
面料很重要
You might only consider the pattern of an umbrella to be worth paying attention to, but don’tignore fabrics! Common umbrella fabrics include satin, polyester, cotton, nylon and othermicrofiber materials. But studies show that polyester’s ability to block UV rays is better thanother materials’. It absorbs and reflects UV rays more effectively。
你可能仅仅考虑了伞的图案,却忽略了它的面料。一般伞的面料包括缎子、涤纶、棉布、尼龙以及其他微纤维面料。但是研究表明,涤纶阻挡紫外线的效果比其他面料都要好。涤纶可以更有效地吸收并反射紫外线。
Nowadays, it’s said umbrellas with black coatings inside block the sun better than those withsilver coatings. But according to The Mirror, which once did an experiment on umbrellas, theirUV-blocking abilities are almost the same. So, don’t throw more money at buying umbrellas withblack coatings, as silver is just as good。
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