Abstract
Various characteristics of Opuntia humifusa (O. humifusa) extract solution obtained under low temperature and reduced pressure were examined and cosmetic essences using the extract solution as a humectant were prepared. The O. humifusa extract solution represented very small surface tension (25 mN/m) and contact angle (8 °), compared with other humectants such as glycerine and 1% hyaluronic acid solution. Also, the viscosity and stickiness of the extract solution were very low. The O. humifusa extract solution made it possible for a small amount of oil to be dispersed stably in water without any surfactant. Unlike other humectants, the viscosity and stickiness of cosmetic essences were reduced as the extract solution content in formulation increased. These results show that the O. humifusa extract solution obtained under low temperature and reduced pressure can be used as a natural humectant that provides moisturizing property and less sticky feeling.
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