울금 추출물이 함유된 기본 제형 크림의 안정성 평가

The cosmetics industry has recently become interested in adding active constituentsthat contain natural plant extracts to cosmetic creams to improve the signs of skin aging.This study investigated the physicochemical and morphological stability of five basic creams containing Curcumae longae Radix extract. The creams were prepared from one basic recipe by adding five different concentrations of C. longae Radix extract. The basic creams that were formed with W/O have excellent water resistance and durability. The stability of the particles size in the creams was densely 3.5 ㎛ by polarized optical microscope and ELS-800. Also, the change of pH in the creams showed no significant change over several days(1, 7, 14, 28, 40 days). After exposing the creams to an artificial lamp test(30 min, 1, 3, 6, 10 h) to sunlight(7, 14, 40 days) and to various temperatures (0℃, 24℃, 40℃). there were no significant differences in flavor, acidity, rancidity and discoloration. Thus, it is expected that C. longae Radix extract will be a very useful additive to cosmetics for improving skin aging.