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Effect of Color Developing by Alkali and Heating of Cotton Fabrics Dyed with Persimmon Extract

알칼리와 열처리에 의한 면직물의 감즙염색 발색효과

  • Kim, Ok-Soo (Dept. of Clothing and Textiles, Pusan National University) ;
  • Jang, Jeong-Dae (Dept. of Clothing and Textiles, Pusan National University)
  • Received : 2011.09.02
  • Accepted : 2011.12.22
  • Published : 2011.12.31

Abstract

The purpose of this study is to improve the method of color developing with alkali solution as a promotor of color developing for feasible use. Cotton fabric was dyed with persimmon extract ranged with 0~3% alkali component with 5 types of strong to mild alkali solution. Heat treatment for color developing was applied to fabric dyed with persimmon extract and alkali mixing solution. Tests were carried out to analyze the change of surface color, ${\Delta},Ea^*b^*$, and water repellent of the dyed cotton fabric. The alkali mixing sample showed higher ${\Delta},Ea^*b^*$ value than control one without alkali mixing on the base of dyed fabric due to high color developing by alkali in the initial step of dyeing process. As alkali concentration increased, deeper dark color appeared on the fabric. The fabric color was changed to more dark in the application of sodium hydroxide, sodium carbonate, potassium carbonate in the initial step of dyeing process but color was not changed by increased heating time. However, the fabric showed a slight dark color with sodium acetate and more color change than that of the fabric dyed with persimmon extract without alkali. Therefore, sodium acetate seemed to a suitable promotor for color developing in persimmon extract dyeing. Property of water repellent was showed after color developing by heating with low concentration of alkali treatment.

Acknowledgement

Supported by : (주)네이쳐팜, (주)엠에스씨

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