EFFECT OF DYEING PARAMETERS ON DYEING OF COTTON FABRICS WITH FLUORO CHLORO PYRIMIDENE REACTIVE DYES

Abstract

Effects of electrolyte, alkali, liquor ratio and temperature were observed on dyeing of cotton fabric with Fluoro Chloro Pyrimidene (FCP) Dyes. For this experiment single joursey knitted fabrics were taken. The selected dyestuffs were Drimarene Yellow K2R (DYK), Drimarene Red K8B (DRK) and Drimarene Blue K2RL (DBK). 1% on the weight of fabric (owf) of each dye was considered for producing 9 combined shades on 9 fabric samples. Isothermal exhaust method was followed for dyeing. To observe the effect of a particular parameter, that one was varied while other parameters kept constant. The dyed samples were tested in a reflectance spectrophotometer (datacolor 650) to get the CIELAB coordinates (L*, a* and b*). The color values (K/S) of the samples were calculated by Kubelka-Munk equation and from that value the strength% were determined. The results show that DRK and DBK were positively influenced by the increase of electrolyte and temperature though DYK was negatively influenced. All over depth of shade was increasing with the increase of electrolyte, alkali and temperature and 1:20 liquor ratio was found more suitable than 1:10 and 1:30.