V.35,no.4,Dec 2023 https://doi.org/10.5764/TCF. Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2018 / V.30,no.2,Jun Title Eco-friendly Leather Dyeing using Biomass Wastes(Ⅰ): Natural Dyeing of Eel Skin using Onion Peels Authors Youngmi Yeo , Dong Il Yoo1 and Younsook Shin Institution/Affiliations Chonnam National University Pages/Total page pp.141 ~ 149 / 9 Language Korean Abstract Abstract This study aimed to investigate the efficacy of eco-friendly leather dyeing by utilizing food wastes. Natural dyeing of eel skin was attempted using onion peels which have been used commonly for natural dyeing of textile fabrics. Eel skin is a by-product from fishery processing and is used mainly for making leather products. The colorant was extracted from onion peels in boiling water, concentrated, and freeze-dried. Dyeing of eel skin was carried out to study the effects of dyeing conditions, mordant type and mordanting method on dye uptake, color change, drape stiffness and colorfastness. The optimum dyeing conditions were 60℃ of dyeing temperature, 60min of dyeing time at 1:100(H2O 90%: ethanol 10%) of bath ratio. The onion peels produced yellowish color on eel skin. The pre-mordanting was effective than the post-mordanting. As a result of the drape stiffness measurement, the Fe-mordanted sample was somewhat stiffer comparing to other mordanted samples. The light fastness of the non-mordant dye was excellent in 3-4 grade. Drycleaning fastness and rubbing fastness showed excellent results, but fastness was not significantly improved by mordanting. Keywords Keywords eel skin, onion peel, food byproduct, natural dyeing, fastness Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2018_v30n2_141&ordernum=