Abstract:

According to the demand for development of facial cleansers, the suitable soap based surfactant and the amino acid surfactant were selected to prepare facial cleansers based on pure soap, pure amino acid surfactant and the mixture of soap and amino acid surfactant. The moisturizing, sebum control and mildness of the three kinds of facial cleansers were compared by volunteer evaluation, skin dyeing residue test and skin natural moisturizing factor/lipid extraction tests. The results showed that the ability of moisturizing of soap-amino acid surfactant based cleanser was higher than that of pure-soap based cleanser, and its sebum controlling property was better than that of pure-amino-acid-surfactant based cleanser. Moreover, the soap-amino acid surfactant based cleanser was the favourite one according to the volunteer evaluation. In addition, the residue of soap-amino acid surfactant based cleanser on the skin was less than that of pure-amino-acid-surfactant based cleanser, and its skin mildness was much better than that of pure-soap based cleanser. In general, the soap-amino acid surfactant based cleanser developed in this study achieves a better balance among cleansing ability, mildness and skin feeling.

Key words: mixture of soap-amino acid surfactant, facial cleanser, mildness, moisturizing, sebum control