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KMID : 0604520080340010063
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Journal of the Society of Cosmetic Scientists of Korea
2008 Volume.34 No. 1 p.63 ~ p.66
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Study on the Sun Protection Factor(SPF) Test Method for Sun Product Water Resistance
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Mun Kyoung-Jin
Kim So-Un
Mun Ju-Hee
Kim Soo-Jin
Kim A-Young
Moon Tae-Kee
Kim Nam-Soo
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Abstract
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Sunscreen is usually used by people when they are at the beach or outdoor swimming pools. Since the existing methods of and standards for measuring the effects of blocking ultra violet rays do not employ water resistance test methods, the establishment of a water resistance SPF test method is required. In this study, to standardize the SPF evaluation methods for a water resistant sunscreen, proposed measurement methods in this study were compared with those of foreign countries. Selected water resistance SPF experiments confirmed the product’s suitability and a verification test was then conducted by establishing the variables of water resistance SPF measurement methods. In the comparative experiment on water resistance SPF given a water temperature of degrees centigrade showed that temperature did not have any statistically significant effect on water resistance SPF. The changing water flow also did not have any statistically significant effect on the water resistance SPF. Therefore, continuous 20 min water circulation is deemed appropriate as an alternative to the subject’s usual activity.
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KEYWORD
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sunscreen, SPF, water resistance, comparative experiment, SPF measurement methods
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