Research on the analysis of Perceptual Mechanisms of the Colors of the Foundation Applied to the Face

How the color of an object looks is significantly affected by what color of light is used for illumination, what color of light the object reflects, or how the color is perceived by the brain. The same color can be perceived by the brain as totally different colors. (Figure 1)
To correctly understand how the color of foundations and other makeup products can look, it is necessary to learn the perception mechanism of the brain.

The key to making the final condition of makeup beautiful is how the color of the part (face) with foundation naturally matches the color tone of the part (neck, etc.) without foundation. In daily situations, shading appears in the area from the face to the neck (face line). If there is any shading, it is difficult for the brain to understand the relationships between different colors. If different colors are not aligned in a straight line, however, the brain understands that those colors are totally different. (Figure 2).

The psychological experiment we performed has found that a color of foundation that is not aligned in a straight line causes a sense of strangeness and that if the color of foundation is aligned in a straight line, a brighter-color tone of foundation can be used. Based on these findings, we have developed technology to calculate the matching of color tone directions based on facial images. These research findings have been used as one of the basic theories for the development of base makeup products.

Research into Physical Properties that Create Firm and Strong Hair

Recently, the market for hair care cosmetics, including scalp care, has been expanding. When talking about anti-aging products for hair care and hair growth drugs, the terms "firm hair" and "strong hair" are often used. To assess the "firmness and strength" of hair, it is generally known to use a method to measure bending elastic modulus and hair strength.
However, little research has been conducted to pursue hair properties that affect a feeling of firmness and strength. Given these circumstances, we carried out research to clarify the physical properties of hair that characterize a feeling of firmness and strength.

We conducted research on how a perceived feeling of firmness and strength is correlated with the cutting strength of the hair, coefficient of hair friction, the cross-section area of the hair, the ellipticity of the hair cross-section area, and hair bending angle. As a result, it has been found that a perceived feeling of firmness and strength is correlated with the cross-section area of the hair (R=0.807).（Spiaman rank-order correlation coefficient p<0.01）
In addition, we implemented research concerning correlations between changes in the cross-section area of the hair and a feeling of firmness and strength. Research findings indicate that the larger the cross-section area of the hair is, the more the feeling of firmness and strength increases. It means that the thickness of the hair has a significant influence on a perceived feeling of firmness and strength.