Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2021 / V.33,no.4,Dec Title Performance Analysis of Ink for Digital Textile Printing Using Natural Indigo Authors Won Kyoung Lee, Eun Ji Sung, Joung Ryul Moon, In Yong Ahn1, Kwang Ho Yoon2, Yoon Cheol Park3, and Jong Hoon Kim* Institution/Affiliations Korea High Tech Textile Research Institute,1Gyeongbuk Technopark,2Digital Textile Ink Co., Ltd., 3Ko Pages/Total page pp.202 ~ 209 / 8 Language Korean Abstract Natural dyes are more expensive than synthetic dyes and the dyeing process, which is mainly immersion of dye, is complicated. For this reason, relatively small-scale production methods were predominant. However, awareness and interest in environmental sustainability is rising globally, and the use of synthetic dyes causes various environmental problems such as wastewater and CO2 emission, so the consumption of natural dyes is increasing. In addition, interest in digital textile printing, an eco-friendly dyeing method that can produce products of various designs and uses less water, is growing. In this study, natural indigo dye (Indigofera tinctoria) was used as a raw material for Digital Textile Printing ink, and 14C (Biocarbon) present in it was measured to confirm whether it was derived from natural ingredients. The performance was confirmed by testing the pH, viscosity, electrical conductivity, surface tension, and particle size analysis of natural indigo ink. In addition, the performance of natural indigo DTP ink and printing fabric was evaluated by inspecting the change in color fastness and corresponding index substances before and after digital printing with natural indigo DTP ink on textiles. Through this, the possibility of commercialization of DTP ink and printing fabric using natural indigo was confirmed. Keywords digital textile printing, indigo ink, biocarbon, natural dye, performance evaluation, nonaqueous Download   Reference http://koreascience.or.kr/journal/OSGGBT.page?&lang=ko