著者

澤田 忠信 石井 裕之 市川 紘章 渡邉 和希 青木 淳治 上田 豊甫

出版者

日本シルク学会

雑誌

日本シルク学会誌 (ISSN:18808204)

巻号頁・発行日

vol.19, pp.15-21, 2011 (Released:2011-12-06)

参考文献数

7

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Tyrian purple (6,6′-dibromoindigo) is the oldest known dye, and has been used since pre-Roman times in the Mediterranean region. In its reduced form in a vat, it dyes fibers a brilliant violet. Although this dye is stable in the solid state, the leuco-form used in vat-dyeing is unstable in light, giving leuco-indigo by debromination; fibers then become dyed a bluish shade. We examined how to prevent the influence of light on this dye in the vat. We found that light of 300-500 nm wavelength promoted debromination, and that good vat-dyeing could be achieved by excluding light of such wavelengths.( E-mail: sawada@ge.meisei-u.ac.jp)