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http://dx.doi.org/10.15230/SCSK.2013.39.3.251

Characteristic of MED measurement Value of Trial Subjects from Ultraviolet Irradiation  

Suk, Jang Mi (Citi Bldg.)
Park, Shin Young (Citi Bldg.)
Choi, Mi Ra (Citi Bldg.)
An, Song Yi (Citi Bldg.)
Kim, In Soo (Department of Dermatology, Chung-Ang University College of Medicine)
Kim, Beom Joon (Department of Dermatology, Chung-Ang University College of Medicine)
Park, Jin O (Daebong Life Science)
Jung, Sang Wook (Citi Bldg.)
Publication Information
Journal of the Society of Cosmetic Scientists of Korea / v.39, no.3, 2013 , pp. 251-257 More about this Journal
Abstract
In this study, ultraviolet protection factor (Sun Protection Factor, SPF) was investigated to provide basic data for subject safety and research of ultraviolet (UV) irradiation test in the future. Trial subjects (395 people) of skin type I, 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 comfortably to be UV irradiated for 60 s and erythema was evaluated 24 hours after application. MED (Minimal Erythema Dose) was investigated where the minimal amount of erythema existed among UVB irradiated area. Statistical analysis was investigated using Statistical Package the Social Sciences program. As a result, the darker skin color results in the higher MED value since the higher skin type number results increased MED value and female has higher MED value than male since female has darker skin type than male. There was no relation between MED difference by ages in all different 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 obtained through this study can be used as a standard when MED value is expected to evaluate efficacy of sunscreen product and as basic data for further safety of clinical researches.
Keywords
UV radiation; minimal erythemal dose; sun protection factor; sunscreen;
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