Abstract
It is necessary in the evaluation of cosmetic products to get the user's tactile impression directly and objectively. The measurement of the friction on human skin surfaces, which may be one of methods to get the user's tactile impression directtly and obiectively, is important in the objective evaluation of cosmetic products.
Frictional measurements on the human skin surfaces were carried out on 12 subjects before and after the application of an emollient cream. Seasonal change, individual differences and the use of a toilet soap were found to affect the fricttion on the human skin surfaces. The frictional characteristic of the human skin surfaces after the application of an emollient cream was found to relate with the sensory attribute and also with the composition of oil phase in formulary of cream.
It was interesting to find that the frictional characteristic of the skin after an application of an emollient cream in the early winter corresponded to that of the bare skin in summer, and also that the difference of preference for the emollient creams related to the tendency of individual differrences of the friction values of the bare skin.
