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Developing beauty-enhancing makeup by controlling light reflected from skin (I) – a makeup foundation incorporating an optical effect of red light

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Lighting can change the appearance of the skin in a major way. Taking notice of the fact that illumination with enhanced red content is often used to make skin look more attractive; we evaluated the effect of long wavelength light on the appearance of the skin. We developed a light source that could emit light in any combination of wavelengths, and used a variety of lights against the skin to conduct a visual evaluation. As a result, we found that skin that was illuminated with light containing a large percentage of long wavelength light of at least 600 nm appeared even in tone, with skin faults such as spots and fine wrinkles rendered less visible. Next, we evaluated the light reflected from the skin. As a result of an evaluation of spectral reflectance and skin appearance, we found that as little as a 10% increase in the reflectance of long wavelength light contributed to the enhancement of an even appearance of the skin. We therefore considered methods for incorporating this ‘flattering effect’ to make the skin appear better than it actually is into the development of cosmetic products. We engaged in the development of powdered material that would generate the same kind of reflectance as would be generated by illumination with red light. As a result, we came to develop a red powdered fiber with a #-shaped cross-section. This material, with its unique cross section, demonstrated an effect of enhancing only the reflectance of long wavelength light, without lowering lightness or chroma. We verified that when this powder was formulated into a sample foundation and applied to the skin, the skin appeared more even in tone and looked more attractive compared to skin to which conventional foundation was applied.
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Document Type: Abstract

Affiliations: 1: R&D Laboratories, POLA Chemical Industries, Inc., 27-1, Takashimadai, Kanagawa-ku, Yokohama 221-0833, Japan, 2: Product Planning Division, POLA Cosmetics, Inc., 2-2-3, Nishi-gotanda, Shinagawa-ku, Tokyo 141-8523, Japan

Publication date: August 1, 2007

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