Optimisation of Dyeing with Reactive Dyestuffs Procedure by Means of HPLC Analysis

Abstract

An active and a hydrolysed form of C.I. Reactive Red 183 dye in dyebath were investigated by means of High Performance Liquid Chromatography (HPLC). The influence of temperature on dye fixation was investigated in a preliminary procedure of dyeing in the thermostat. The research shows that at temperature of fixation at 20 °C after dyeing procedure an active form of dye is still present in dye bath even if the time of dyeing procedure is prolonged. The influence of temperature of adsorption on dye fixation was investigated in a jet apparatus. Dye fixation was executed at 50 and 60°C, in the mean time pH value for dye fixation varied. The research shows that during dyeing in a jet in the presence of Na2CO3 and NaOH after 65 minutes an active form of dye completely disappears from dye bath. On the basis of HPLC analysis of dye bath at the beginning and at the end of dyeing procedure and after rinsing and soaping the fixation of adsorbed dye was determined. It was found out that the addition of NaOH has negative influence on dye fixation.