Abstract
ObjectionThe aim of this study is to determine the effect of clothing and the environment on human exposure to ultraviolet light.MethodsThe ultraviolet (ultraviolet A and ultraviolet B) light intensity was measured, and air quality parameters were recorded in 2014 in Beijing, China. Three types of clothing (white polyester cloth, pure cotton white T-shirt, and pure cotton black T-shirt) were individually placed on a mannequin. The ultraviolet (ultraviolet A and ultraviolet B) light intensities were measured above and beneath each article of clothing, and the percentage of ultraviolet light transmission through the clothing was calculated.Results(1) The ultraviolet light transmission was significantly higher through white cloth than through black cloth; the transmission was significantly higher through polyester cloth than through cotton. (2) The weather significantly influenced ultraviolet light transmission through white polyester cloth; transmission was highest on clear days and lowest on overcast days (ultraviolet A: P=0.000; ultraviolet B: P=0.008). (3) Air quality parameters (air quality index and particulate matter 2.5 and 10) were inversely related to the ultraviolet light intensity that reached the earth’s surface. Ultraviolet B transmission through white polyester cloth was greater under conditions of low air pollution compared with high air pollution.ConclusionClothing color and material and different types of weather affected ultraviolet light transmission; for one particular cloth, the transmission decreased with increasing air pollution.
Highlights
Ultraviolet light refers to electromagnetic radiation at wavelengths between the visible and X ray spectrums
Clothing color and material and different types of weather affected ultraviolet light transmission; for one particular cloth, the transmission decreased with increasing air pollution
7-dehydrocholesterol in the skin is converted into vitamin D through multiple processes after exposure to UVB, and vitamin D subsequently modulates calcium metabolism in the body, which is essential for the metabolism of numerous cell types and for bone health
Summary
Ultraviolet light refers to electromagnetic radiation at wavelengths between the visible and X ray spectrums. In vitro experiments have revealed that the color, material, and tightness of clothing, in addition to humidity and other factors, affect ultraviolet light transmission [10,11,12,13], but there have been few studies on the human body. The UVA and UVB intensities were monitored at different times each day, multiple air quality indices were recorded, and the correlations between the color, material and tightness of clothing and ultraviolet light intensity and transmission were analyzed. A mannequin was used in our study to measure ultraviolet intensity at different anatomical sites This approach avoided damage caused to a person as the research object and promoted a better understanding of the natural and individual factors that influence human exposure to ultraviolet light
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