Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2020 / V.32,no.2,Jun Title Efficacy of Amaranth(Amaranthus spp. L.) Plant as a Natural Dye Resource: Focused on Wool Dyeing Authors Youngmi Yeo and Younsook Shin* Institution/Affiliations Chonnam National University Pages/Total page pp.89 ~ 95 / 7 Language Korean Abstract Abstract In this study, the efficacy of Amaranth(Amaranthus spp. L.) as a natural dye resource was investigated for wool fabrics. It is known that a large amount of flavonoid and anthocyanin colorant are contained in leaves and stems, as well as red flowers. The optimum condition of dyeing was 1.3% of dye concentration(o.w.b.) at 100°C for 60 minutes, resulting the K/S value, 23.43 and R Munsell color on the wool fabrics. Al, Fe, Zinc and Titanium were used as a mordant. The mordant improved the dye uptake, regardless of the mordant type and mordant method. The pre-mordanting method was more effective than the post-mordanting method. Al premordanted fabric showed the highest K/S, 30.02. Light fastness and washing fastness were high in grades 4-5 and 5, and rubbing fastness was good in grades 4 and 4-5 in dry condition, but low in grades 2-3 and 3 in wet condition. The dry cleaning fastness was excellent in all 5 grades. However, the alkaline perspiration fastness ratings were low in grades 2-3 and 3. The results show Amaranthus spp. L. colorant can be used as a functional natural dye for wool fabrics. Keywords Keywords Amaranthus spp. L., natural dyeing, wool, fastness, mordant, dye uptake Download   Reference http://koreascience.or.kr/article/JAKO202020550932775.page