Abstract
Texture property is one of the most important factors in the individual customer requirements for cosmetic products. A new instrument was developed to quantify the texture properties for lipsticks. Skin friction was measured when lipsticks were spread on artificial skin with a certain load. Correlation was obtained between friction and the result of a sensory evaluation item accounting for spread. The continuous film feeling was recognized by measuring friction with various intervals until spreading again. Strong film feeling was obtained in some samples as the viscosity increased. It was supposed to be caused by stability of the wax during rearrangement of the film. From this result, a model of the film feeling was designed. The fitting parameters were found to have correlation to the result of sensory evaluation items accounting for spread and fitness.
