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KMID : 0604520130390030251
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Journal of the Society of Cosmetic Scientists of Korea
2013 Volume.39 No. 3 p.251 ~ p.257
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Characteristic of MED measurement Value of Trial Subjects from Ultraviolet Irradiation
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Suk Jang-Mi
Park Shin-Young
Choi Mi-Ra
An Song-Yi
Kim In-Su
Kim Beom-Joon
Park Jin-Oh
Jung Sang-Wppl
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Abstract
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In this study, ultraviolet protection factor (Sun Protection Factor, SPF) was investigated to provide basic datafor subject safety and research of ultraviolet (UV) irradiation test in the future. Trial subjects (395 people) of skin typeⅠ, Ⅱ, and Ⅲ were evaluated according to skin type standard table. After measuring the skin color using a colorimeter,ITA (Individual Typology Angle) value was calculated. Subjects with 28 and above ITA value were positioned comfortablyto be UV irradiated for 60 s and erythema was evaluated 24 hours after application. MED (Minimal ErythemaDose) was investigated where the minimal amount of erythema existed among UVB irradiated area. Statistical analysiswas investigated using Statistical Package the Social Sciences program. As a result, the darker skin color results in thehigher MED value since the higher skin type number results increased MED value and female has higher MED valuethan male since female has darker skin type than male. There was no relation between MED difference by ages in alldifferent ages. However, it is hard to draw a conclusion as above since the number of subjects were not sufficient to support statistical significance for MED values by different ages. However, MED values by skin types obtainedthrough this study can be used as a standard when MED value is expected to evaluate efficacy of sunscreen productand as basic data for further safety of clinical researches.
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KEYWORD
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UV radiation, minimal erythemal dose, sun protection factor, sunscreen
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