Recently, non-ionic surfactants are widely used as home detergents. It is desired to develop a simple measurement method for evaluating the remaining non-ionic surfactants in the laundry, the effect of rinsing in the wash, and the behaviour of non-ionic surfactants in the drainage. In this study, a new quantitative determination method for evaluating the POE type of non-ionic surfactants is proposed The method utilizes a handmade heating turbidimeter which measures the tubidity relating to its temperature change. The effectiveness of the proposed quantitative determination method is verified by comparing with conventional UV and ELISA methods.
In this study, the warm-cool evaluation of the model skin colors and the lipstick colors was tried; and the matching of the skin and the lipstick color combinations was investigated by the paired comparison method. The pink and dark skin colors were perceived as warmer than the ocher and light ones. These are consistent with the tendency recognized for general colors. The judgment of the suitability of the lip colors was affected by the skin colors. The hue of red on both of the skin color (light ocher and dark pink) was estimated as high suitability. On the other hand, the effects of the value (lightness) of the lip colors on these skin colors were inverse. The hue and the lightness of the skin and lipstick color, therefore, have to be considered when we make a suitable color combination.
This study has two final goals. The one is to obtain some practical and fundamental guides to designing cosmetic powder puffs made of synthetic-fiber cloths which have superior intake abilities, including micro-fiber puffs. The other is to confirm whether micro-fiber powder puffs have good intake ability or not. Some measurements were conducted using five kinds of synthetic-fiber puffs, each with different fiber diameters and pile lengths, and one kind of cotton puff currently on the market in Japan. The measurements included the intake weight of powder, observation of puffs coming in contact with powder, the weight of powder retained on a fiber, SEM photographs of powder retention, etc. It was concluded that important factors in designing superior synthetic-fiber puffs are fiber diameter, pile length and space between fibers. Micro-fiber puffs used in this study had not good intake ability.