たまねぎ外皮で染色した染色布の色相

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As for the quercetin pigment included in onionskin, a lot of studies are done other than dyeing. Onionskin is disposed as garbage currently and we experimented on dyeing for the purpose of utilizing disposed onionskin. Silk and cotton cloth were dyed by the dyestuff extracted from onionskin.The mordanting metals used here were Al3＋, Cu2＋, Fe3＋ and Sn4＋. The dyestuff concentration was 100％ o.e.f. The concentrations of mordanting metal were made changing by 1.0％ to 5.0％ o.e.f. Dyeing was experimented by pre-mordanting and post-mordanting processes, and influences on the hue of dyed cloths were examined. The hue of dyed cloth was measured on a spectrophotometer, and the values were expressed in CIEL*a*b* color system. Color difference （△E*） of silk cloth compared with cotton cloth was higher. The hue of dyed cotton cloth was alterable by changing the dyeing process. The cloth dyed in dark color was provided by the post-mordanting except Sn4＋. Color difference （△E*） of dyed cloth was influenced by the fiber structure and pH of dyeing bath （neutral solution～acidic solution）. The hue of dyed cloth was yellow～brown series （Al3＋, Sn4＋ and Cu2＋） and thin～dark green series （Fe3＋）. Hues of dyed cloths were different according to the coordination number of metal ions.The absorption spectrum of dyestuff extracted from onionskin was similar to that of the pure quercetin. Al3＋ mordanted cloth was dyed by yellow, and the aluminum complex of quercetin has a color of yellow, too. Quercetin glycoside was absorbed mainly by dyeing process using the dyestuff extracted from onionskin. The onionskin dyeing to cellulose fiber is possible without the process such as tannine treatment to maintain the deep color.
長野県短期大学の論文
2002-12-00

たまねぎ外皮で染色した染色布の色相

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