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Study on the Sun Protection Factor(SPF) Test Method for Sun Product Water Resistance  

Mun, Kyoung-Jin (Ellead Co., Ltd.)
Kim, So-Un (Ellead Co., Ltd.)
Mun, Ju-Hee (Ellead Co., Ltd.)
Kim, Soo-Jin (Ellead Co., Ltd.)
Kim, A-Young (Ellead Co., Ltd.)
Moon, Tae-Kee (Ellead Co., Ltd.)
Kim, Nam-Soo (Ellead Co., Ltd.)
Publication Information
Journal of the Society of Cosmetic Scientists of Korea / v.34, no.1, 2008 , pp. 63-66 More about this Journal
Abstract
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 $23{\sim}32$ 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.
Keywords
sunscreen; SPF; water resistance; comparative experiment; SPF measurement methods;
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  • Reference
1 Sunscreen drug product for over-the-counter human use, Federal Register, 43, 38206, USA (1978)
2 AS/NZS standard sunscreen products-evaluation and classification, 2604, Australian/New Zealand (1993)
3 Guidlines for evaluating sun product water resistance, COLIPA, 3 (2005)