Dyeing Properties of Cotton Fabrics Dyed with Extract from Dry Leaf of Indigo Plant (건조 쪽잎 추출액에 의한 면직물 염색성)

송성원; 조경래

Dyeing Properties of Cotton Fabrics Dyed with Extract from Dry Leaf of Indigo Plant

Textile Coloration and Finishing
Abbr : Text. Color. and Finish.
2008, 20(3), pp.18-24
Publisher : The Korean Society Of Dyers And Finishers
Research Area : Engineering > Fiber Engineering > Dyeing Engineering

송성원 ¹, 조경래 ¹

¹신라대학교

Accredited

ABSTRACT

The purpose of this study is to develop the dyeing method with dry leaves of indigo plant. Coloring matter was extracted from dry leaves of indigo plant with hot sodium hydroxide solution. The extract was reduced with sodium dithionite, and it was used for dyeing cotton fabrics under various conditions. UV-visible absorption spectra of extract, reduction rate of extracts by reducing agent, and the surface color of dyed cotton, lightfastness were examined. For the initial 20 minutes, the absorbance of indigo solution rapidly decreased. However, several hours later, the decreasing rate retarded. By repeating the dyeing process, the shade looked deeper and deeper. At 30~40℃, the value of K/S reached the highest point. The concentration of indigo solution in dye bath seemed to play a critical role for the reaction of the reducing agent. It was observed that the surface color of cotton fabrics was getting bluish and its degree of value and chroma seemed slightly decreased as the K/S value was increasing. The lightfastness was clearly enhanced by increasing the K/S value.

KEYWORDS

cotton, natural indigo, dry leaves, sodium dithionite

Citation status

* References for papers published after 2023 are currently being built.

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