Study of Seniors’ Skin Color and Optical Properties

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  • シニアの肌色と光学特性に関する研究
  • シニア ノ ハダイロ ト コウガク トクセイ ニ カンスル ケンキュウ

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Abstract

<p>In order to develop cosmetic products based on the optical properties of the skin of seniors, we investigated the characteristics of skin color and light scattering inside the skin. Color measurements were performed on four sites on the face (lower part of the cheek, cheek center, beside the eye, and behind the chin), and the values of hue, lightness, and chroma in the Munsell space were determined. Four colorimetric values measured from the same person were plotted on the hue lightness dimension and chroma lightness dimension, and the straight line approximating the four points was obtained in each dimension. Focusing on the slope of the approximate line between hue and lightness and comparing between age groups, we observed little change in lightness with changes in hue in the younger age group, whereas, in the senior age groups, the lightness declined when the hue became reddish. The reflection pattern analysis from the slit light irradiation suggests that the decrease of the reduced scattering coefficient inside the skin is related to the lightness decrease.</p>

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