Abstract
Pearl and shellfish with laminated structures display a brilliant radiance from the inside. We explored the relationship between the radiance from inside the skin and ordered arrays of laminated stratum corneum (SC). The sensory evaluation of the skin, the evaluation of the SC regularity and the measurement of the degree of scattering in the skin were performed. As a result, significant correlations were indicated between the SC regularity and both the sensory evaluation of radiance and the degree of scattering from inside the skin. Next, we started to develop new cosmetics which reproduce the radiance from inside the skin. First, focusing our attention on the ordered array of laminated SC, a new powder was developed. Similar to SC structure, it has two alternating layers of different materials. The degree of scattering of conventional powders which have a laminated structure was lower than that of the skin with irregular SC, whereas the degree of scattering of the new powder was higher than that of the skin with regular SC. Finally, an experimental foundation containing the new powder was produced and applied to the skin of test subjects. We confirmed this new makeup to be more effective than traditional makeup in reproducing the radiance from inside the skin.
