Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2015 / V.27,no.4,Dec Title Utilization of Metasequoia(Metasequoia glyptostroboides) Cone as a New Natural Dye Resource(2): Dyeing Properties and Antimicrobial Functionality of Silk Fiber Authors Jun Yan, Dong Il Yoo1 and Younsook Shin Institution/Affiliations Chonnam National University Pages/Total page pp.281 ~ 287 / 7 Language Korean Abstract Abstract: The aim of this study was to investigate the possibility utilizing Metasequoia(Metasequoia glyptostroboides) cone as a new natural dye resource. In previous study, dyeing onto cotton fiber was carried out and Metasequoia cone colorant showed low affinity to cotton fiber and maximum dye uptake was obtained at pH 3.5 showing YR Munsell color. For further evaluation of its efficacy as a new natural dye resource, effects of dyeing conditions and mordanting on dye uptake, color change, and colorfastness were investigated for silk fiber. Metasequoia cone colorant showed good affinity toward silk fiber showing YR Munsell color and maximum dye uptake was shown at pH 3.5. Post-mordanting with Cu and Fe improved dye uptake, especially Fe(C5H10FeO6) mordant was effective as much as 2 times higher dye uptake comparing with un-mordanted sample. The color of dyed fabrics with mordanting showed YR Munsell color. Fe mordanted fabrics appeared dark gray~black color. Colorfastness to washing was relatively good, whereas lightfastness of the dyed fabrics showed grade 2. It was confirmed that Metasequoia cone colorant can be used as a new dye resource for silk fiber getting brownish yellow to dark gray/black color depending on mordant type. In addition, it showed antimicrobial functionality. Keywords Keywords: metasequoia cone colorants, silk, hydrolyzable tannins, colorfastness, antimicrobial functionality Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2015_v27n4_281&ordernum=6