Synthesis and Applications of Three Vinylsulfone Based Fiber-reactive azo Dyes for Dyeing Cotton Fabric

Newfangled vinylsulfone (VS) based fiberreactive dyes were synthesized and applied to mill desized, bleached and mercerized textile fabric (100% cotton). Padthermosol dyeing method was utilized due to less hazardous environmental affects and high dye fixation to optimize dyeing quality parameters i.e. salt concentration, pH, dyeing time and dyeing temperature. The pretreated and dyed cotton fabrics were subjected to CIE LAB and LCH system to study the dyeing quality parameters such as dL* (difference in lightness coordinate), da* (difference in red/ green co-ordinate), db* (difference in yellow/ blue co-ordinate), dC* (difference in chroma co-ordinate), dH* (difference in hue angle) and dE* (total color difference) with the assistance of Spectraflash SF600 at Noor Fatima textile. Pvt. Ltd., Faisalabad. Subsequent ISO standard test methods were applied for the assessment of different fastness properties i.e. perspiration, light, washing, chlorinated water, dry cleaning and crocking. Index Term-Vinylsulfone reactive dyes, Color output, Dyeing applications, Cotton, Spectraflash, Crocking