Relationships Between Sensory Values and Physical Properties Related to the Comfort of Using Skin Toner

Abstract

When performing sensory evaluation, it is necessary to consider not only using a lot of time and cost but also human factors such as stress of subjects. This study focused on solution viscoelasticity and peel force. In order to link above properties with sensory values, we performed sensory evaluation for subjects to various samples with different properties. The obtained sensory values were averaged to exclude influences of individual differences, and the correlation between the obtained sensory values and measured properties was investigated. As the results, high correlation was obtained between sensory properties about “moist”, “refresh”, “smooth”, and “sticky”. Also, high correlation was obtained between sensory properties about “sticky” and “skin familiarity” and the maximum value of peel force measured during 50 cycles of measurements. Therefore, when evaluating skin feeling of skin toner, it may be possible to substitute skin feelings to the evaluation of solution viscoelasticity and maximum peel force.