Abstract
The word “mocchirikan” is often used for the post-application sensation of skin care cosmetics. In this study, we examined how to evaluate it by physical measurement. In order to quantify “mocchirikan”, it is important to find out what kinds of sensations it concerns. We investigated the words correlated, with “mocchirikan” in the realm of sensory evaluation. As a result, “mocchirikan” showed positive correlation with “nenchakukan” in cosmetics without “betatsukikan.” It was found tha “t betatsukikan” showed positive correlation with “nenchakukan” and “zan'ekikan.” Moreover, for cosmetics without “betatsuki,” “nenchakukan” and “zan'ekikan” are felt less. Therefore, we suggest that “mocchirikan” can be quantified by the measurement of “nenchakukan” and “betatsukikan.” Through measurement of application sensations with physical equipment, we found that “nenchakukan” showed positive correlation with peel force at 120 sec after application with a compression tester, and “zan'ekikan” had strong correlation with the residual ratio with thermogravimetric analysis at 35 deg C for 30 min. Our results show that cosmetics without “betatsukikan” indicate weak peel force and a low residual ratio. “Mocchirikan” can be evaluated objectively by peel force within the range of a certain value of peel force and residual ratio.
