三次元表示蛍光スペクトルによる古代染織遺物及び浮世絵版画に使用された染料の非破壊的同定法に関する研究

概要

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For the purpose of the title, the fluorescence spectra of dyestuffs were measured with a Hitachi F-4500 spectrophotometer equipped with a personal computer for data transaction and a double-bundle-type fiber-optic cable. Three-dimensional (3-D) spectra were drawn as contour plot diagrams of the fluorescence intensity upon the coordinate of excitation vs emission wavelength. The 3-D spectra of standard natural dyestuffs (fifteen botanical and one mollusc origins) dyed on silk and/or cotton (for cloths) and Japanese paper (for Ukiyo-e) could be distinguished from the position of the top ring of contour lines and their fingerprint patterns, even though it contains two or three main components. From a comparison of the 3-D spectrum with standards, the origin of the colored textile remnant attached on a shell bracelet found at Yoshinogari ruin (B.C. 100) was identified to be deteriorated Tyrian purple, and blue, green, red yarns interwoven into Chinese Brocade (A.D. 1600〜1700) to be indigo, Amur cork and indigo, Amur cork and safflower, respectively. Concerning Ukiyo-e, red and yellow colors on "Yokkaichi" from fifty-three-stages of Tokaido (A.D. 1823) by Katsushika Hokusai, and blue color on "Evening Snow" from eight views of Edo (A.D. 1821) by Gototei Kunisada were determined to be safflower, turmeric and indigo, respectively.
1999-10-05