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Eco-friendly Leather Dyeing Using Biomass Wastes(Ⅱ) : Improving the Dyeability of Pig Leather to Onion Skin Colorant by Pre-treatment

  • Textile Coloration and Finishing
  • Abbr : Text. Color. and Finish.
  • 2018, 30(4), pp.294-303
  • DOI : 10.5764/TCF.2018.30.4.294
  • Publisher : The Korean Society Of Dyers And Finishers
  • Research Area : Engineering > Fiber Engineering > Dyeing Engineering
  • Received : November 22, 2018
  • Accepted : December 11, 2018
  • Published : December 27, 2018

Youngmi Yeo 1 Shin, Younsook 1

1전남대학교 의류학과

Accredited

ABSTRACT

In this study, eco-friendly natural dyeing for pig leather was explored by using onion skin which is food waste. Sodium caseinate was used as a pre-treatment agent to improve dyeability of pig leather and its effect on dye uptake was investigated according to treatment concentration. Dye uptake of the pre-treated pig leather was increased by about two times compared to untreated one at 0.2% pre-treatment concentration. Onion skin colorant imparted YR color on pig leather. After mordanting, the color of pretreated/ dyed pig leather was varied from brick-red to khaki shades. However, mordanting did not improved dye uptake of the pre-treated/dyed pig leather significantly. The colorfastnesses of un-mordanted samples to light, dry cleaning, rubbing were grades 3-4, 5, and 4, respectively, which is good enough to meet all Korean Standard for Fastness of leather products. After mordanting, the light fastness of pig leather was improved to 4, 4-5 grade. The efficacy of sodium caseinate as a pre-treatment agent for pig leather was verified by improved dye uptake and good colorfastness. And, the natural dyeing of pig leather using food waste would be a significant sustainable way in terms of eco-friendliness and reuse of biomass to reduce environmental pollution.

Citation status

* References for papers published after 2022 are currently being built.

This paper was written with support from the National Research Foundation of Korea.