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Journal |
Textile Coloration and Finishing |
Year / Vol., Issue, Month |
2021 / V.33,no.4,Dec |
Title |
Natural Indigo Dyeing of Hanji Fabric using Baker¡¯s Yeast : Effect of Yeast Concentration and Repeat Dyeing |
Authors |
Kyunghee Son*, Younsook Shin, and Dong Il Yoo1 |
Institution/Affiliations |
Chonnam National University |
Pages/Total page |
pp.191 ~ 201 / 11 |
Language |
Korean |
Abstract |
In this study, an eco-friendly indigo reduction system(scale up reduction, use of
buffer solution, and pH control) using baker¡¯s yeast(Saccharomyces cerevisiae) was applied
for natural indigo(Polygonum tinctorium) dyeing of Hanji fabric and Hanji-mixture fabric(
Hanji/Cotton, Hanji/Silk). The effect of concentration of baker¡¯s yeast, repeat dyeing,
and bath reuse was investigated in terms of dye uptake indicating reduction power. And
the oxidation-reduction potential(ORP) was monitored. We also evaluated color properties
and colorfastness according to the color strength. The yeast concentration did not significantly
affect the maximum reduction power. However, the highest yeast concentration
was effective in improving the initial dye uptake, and its the reduction retention power
was the most excellent. Even on the last reduction day, the effect of increasing the dye
uptake by repeat dyeing was observed. And it was confirmed that the reduction bath
could be reused for up to 30 days by supplementing yeast at the end of reduction. For
all the fabrics used, deeper and darker PB color were obtained by repeat dyeing. As dyeing
was repeated, purplish tint got stronger on the Hanji/Silk fabric compared to other
fabrics. Regardless of the composition of Hanji fabrics and color strength, washing and
dry cleaning fastness were relatively good with above rating 4-5, and fastness to rubbing
and light were acceptable with a rating 3-4 ~ 4-5. The eco-friendly natural indigo dyeing
process using niram and baker¡¯s yeast would offer global marketability and diversity of
Hanji product as a sustainable high value-added material. |
Keywords |
hanji fabric, concentration of baker¡¯s yeast(Saccharomyces cerevisiae),
repeat dyeing, color strength, colorfastness, sustainable |
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Reference |
http://koreascience.or.kr/journal/OSGGBT.page?&lang=ko |
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