2017年5月31日

什麼顏色最防曬?

炎熱的夏天一定要做好及時的防曬,才可以保護皮膚不受紫外線的傷害,這時有一件稱職的防曬衣服是最好不過了,但是你知道不同顏色的防曬衣,防曬的效果卻大不同嗎?

深色淺色哪一個防曬好?

紫外線 (Ultraviolet Radiation,UVR),也可簡稱UV。紫外線對於人體才會有殺傷力,所以防曬最大的敵人就是紫外線。所以單就顏色分類而言,白色只能反射可見光,卻無法有效遮蔽紫外線。比起淺色或是粉色系的顏色,深色最能有效吸收紫外線,所以預防紫外線的效果是最好的。而除了深色之外,越鮮豔的顏色也越能吸收紫外線,如鮮紅色等。這是因為紅色等鮮豔顏色的光波較長,可大量吸收日光中的紫外線,而其他顏色就相對較弱,所以夏天穿鮮紅色衣服能阻止紫外線,防止皮膚被曬傷。

另外深色衣服雖然能有效達到防曬的效果,但也因為深色吸收紫外線的效果太好,也會造成溫度上升。這也是為什麼我們經常說穿黑色衣服「會吸熱」的原因。

布料的規格也會影響抗紫外線

雖然說深淺度會影響抗紫外線的能力,布料的織法密度、厚薄重量、材質使用也會大大影響防曬的效果。可以想像一塊布如果織得較鬆散,紫外線就更容易從縫隙中穿過,直接傷害到皮膚。

抗紫外線布料技術

台灣抗紫外線布料的技術也是世界數一數二的。台灣布料廠商製造的ACODRY® Pro防曬吸濕排汗布料,防曬等級就達到檢測的最高等級50+,UPF織物抗紫外線係數更是超過1000。防曬技術遙遙領先各布料廠商,走紅世界各地。

科陽國際提供的ACODRY® Pro防曬吸濕排汗布料檢測報告


一件真正的防曬衣就像太陽防護傘一樣,要能夠可以隔離95%以上的紫外線光,但是這僅限於真正的防曬衣。正規防曬衣原料和製成都需經過特殊處理,價格較高,一般市面上得低價防曬衣多是噱頭,大多只是起到了普通長袖衣的一般遮蔽作用而已。有品質的防曬布料不僅能夠防紫外線,還能將汗水迅速導至織物表面,快速乾燥,而劣質布料則吸濕、透氣性差,長時間穿著容易讓人感到不適甚至長出痱子。


深入了解何謂抗UV布料

編排整理 Edited by: ACOTEX®服裝布料知識網


What is Sun-Safe color for clothing?


What’s the best way to protect yourself from the sun’s harmful ultraviolet rays (UVR), given that we need to work, travel, and sometimes play outside? Clothing is the most basic and generally the best means of sun protection. Not all clothing is equal, however, and some of it isn’t actually very good at protecting us. So, what makes a piece of clothing sun-safe?

Color Comparisons

Most of our clothing is dyed attractive or functional colors. Many dyes absorb UV, which helps reduce exposure. Darker colors tend to absorb more UV than lighter colors, including whites and pastels, but bright colors such as red can also substantially absorb UV rays. The more vivid the color, the greater the protection; a bright yellow shirt is more protective than a pale one. But even a pale fabric can offer good protection if the weave, material, weight, etc. are effective at keeping out UV. And many white fabrics have “optical whitening agents,” chemical compounds that strongly absorb UVR, especially UVA.

Fabric Factors

Of course, you can have clothing over every square inch of your body, but if the sun goes right through it, it’s not much use. Fabrics are made of tiny fibers woven or knitted together. Under a microscope, we can see lots of spaces between the fibers; UV can pass directly through these holes to reach the skin. The tighter the knit or weave, the smaller the holes and the less UV can get through. Twill, used to make tweeds or denim, is an example of a tightly woven fabric. Open weave fabrics provide much less protection.

Fabrics can be made from many types of fibers, including cotton, wool, and nylon. Most fibers naturally absorb some UV radiation, and some have elastic threads that pull the fibers tightly together, reducing the spaces between the holes. Synthetic fibers such as polyester, lycra, nylon, and acrylic are more protective than bleached cottons, and shiny or lustrous semi-synthetic fabrics like rayon reflect more UV than do matte ones, such as linen, which tend to absorb rather than reflect UV. Finally, consider the fabric’s weight and density — light, sheer silk gauze will provide far less UV protection than heavy cotton denim.

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