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요소(urea)와 알파-하이드록시산(α-hydroxy acid)을 안정화한 W/S 에멀젼 제조와 미백 효능 평가
김정성 ( Jung Sung Kim ),신화영 ( Hwa Young Shin ),신진섭 ( Jin Seob Shin ),박선영 ( Sun Young Park ),남개원 ( Gae Won Nam ),채병근 ( Byung Guen Chae ),한상훈 ( Sang Hoon Han ) 한국공업화학회 2011 응용화학 Vol.15 No.1
In this study, W/S type emulsion containing urea and α-hydroxy acid (AHA) was prepared and its stability had been observed for 4 weeks at 5, 30, and 45℃. We observed that the urea and AHA were stabilized by checking pH of the emulsion. The brightening effect of the emulsion containing urea and AHA, reported to moisturize skin and stimulate skin turnover, was evaluated through a clinical study. As a result, both pigmented zone and background color tone of the skin surface became lighter significantly after 4 weeks treatment of the W/S emulsion. In addition, the significant increase of the water content on skin surface and the improvement of the skin texture were observed after overnight treatment of the W/S emulsion.