Influence of Photo-illumination on Greenish Metallic Luster of Safflower Red Pigment Film

Hitoshi Yajima; Maiko Sasaki; Keiko Takahashi; Masato Oshima; Kazuyuki Hiraoka; Morio Yashiro; Katsumi Yamada

doi:10.11454/ephotogrst.28.2_18

Hitoshi Yajima, Maiko Sasaki, Keiko Takahashi, Masato Oshima, Kazuyuki Hiraoka, Morio Yashiro, Katsumi Yamada

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Keywords: Carthamin solid film, Greenish metallic luster, Photo-fading, Carbonyl group

JOURNAL OPEN ACCESS

2018 Volume 28 Issue 2 Pages 18-22

DOI https://doi.org/10.11454/ephotogrst.28.2_18

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Abstract

A visible photo-illumination on the carthamin red pigment solid film was carried out in the study. It was found that the greenish metallic luster of the film was weakened by the photo-illumination and the absorption of the film was also weakened at the same time. Because the deterioration of the carthamin chromophores was induced by the photo-illumination, the absorption in the green light band was probably an important factor of the metallic luster generation.

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