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Open AccessArticle

Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic

by 1,* and 2
1
Department of Mechanical Systems Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
2
Department of Mechanical Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(8), 286; https://doi.org/10.3390/coatings8080286
Received: 3 July 2018 / Revised: 6 August 2018 / Accepted: 11 August 2018 / Published: 17 August 2018
(This article belongs to the Special Issue Binders, Pigments, Dyes and Additives)
In this paper, a method of optimizing a thermal barrier cosmetic and spectral selective cosmetic by controlling the particle size and material is proposed as a countermeasure to heatstroke. The radiative properties of single cosmetic particles of a wide range of particle sizes and wavelengths in non-absorbing air were calculated in this study based on the Mie theory. Al2O3, TiO2, Au, and Ag were used as the material of the cosmetic particle. The radiative property of a particle cloud in dependent scattering was calculated. The radiative transfer in the cosmetic layer was analyzed, and the spectral reflectance of the cosmetic layer on the human skin was calculated. A new parameter was defined to quantitatively evaluate the performance of the thermal barrier cosmetic and spectral selective cosmetic. For the thermal barrier cosmetic, the Al2O3 particle was determined to be suitable, and its size was optimized. For the spectral selective cosmetic, the Au particle was likewise determined to be suitable, and its size was optimized. Our cosmetics satisfied both aesthetic and thermal concerns. View Full-Text
Keywords: dependent scattering; optimization method; radiative transfer analysis; spectral reflectance; thermal barrier cosmetic dependent scattering; optimization method; radiative transfer analysis; spectral reflectance; thermal barrier cosmetic
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MDPI and ACS Style

Gonome, H.; Yamada, J. Optimization Method for Developing Spectral Controlling Cosmetics: Application for Thermal Barrier Cosmetic. Coatings 2018, 8, 286.

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