Abu Naser Md. Ahsanul Haque
BGMEA University of Fashion & Technology, Uttara, Dhaka, Bangladesh
Email: naser.wg@gmail.com
ABSTRACT. Effects of electrolyte and liquor ratio were observed on dyeing of cotton fabric with bi-functional Fluoro Chloro Pyrimidene (FCP), bi-functional Monochlorotriazine-Vinyl Sulphone (MCT-VS) and mono functional Monochlorotriazine (MCT) reactive dyes. For this experiment single joursey knitted fabrics were taken. The selected dyestuffs were Drimarene Yellow K-2R (FCP), Drimarene Red CI-5B (MCT-VS) and Drimarene Navy X-GN (MCT). 1% on the weight of fabric (owf) of each dye was considered for producing 15 single shades by varying the electrolyte amount and liquor ratio. Gluaber salt was used in each dye bath as electrolyte. The post dye liquors were tested in absorbance spectrophotometer (UV 1800) to measure the absorbance of those solutions. Beer-Lambert law was used to get concentration from absorbance and then the exhaustion% was calculated. The dyed fabric samples were tested in a reflectance spectrophotometer (datacolor 650) to get the color coordinates (L*, a*, b*, c*, h*). The results show that FCP dye exhaustion was the best among these three and MCT dye exhaustion was the least but it can be improved by increasing the electrolyte. MCT-VS dye has a tendency to changing its hue in higher electrolyte amount or higher liquor ratios.
KEYWORDS. Electrolyte; Liquor ratio; Chroma; Hue; Exhaustion.
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