Green Metallic Luster on the Film of Safflower Red Pigment Extracted by a Traditional Method

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  • 伝統的手法で抽出されたベニバナ色素膜の緑色金属光沢について
  • 伝統的手法で抽出されたベニバナ色素膜の緑色金属光沢について : 光学的手法による検討
  • デントウテキ シュホウ デ チュウシュツ サレタ ベニバナ シキソマク ノ リョクショク キンゾク コウタク ニ ツイテ : コウガクテキ シュホウ ニ ヨル ケントウ
  • ─光学的手法による検討─
  • -Approach with Optical Measurements-

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Abstract

<p>Safflower red pigment was extracted from a dried flower cake “BENIMOCHI” produced in Yamagata Prefecture by a traditional method. Green metallic luster was observed from the pigment film immobilized on the black base. A reflection maximum around the wavelength of 550 nm was found on the measured spectrum, which corresponded to a green color. There was no angle dependence on the wavelength for the reflection maximum. It was found that the metallic luster occured at the air/film or glass/film interface, and contained poor linearly polarized components. Therefore, these results suggested that the green metallic luster is similar to the reflection of real metallic materials.</p>

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