Effects of pretreatment processes on printing viscose fabrics with reactive dyestuffs

In this project, the investigated parameters that affect the print quality of reactive dyestuffs on viscose fabrics are causticizing, bleaching, reductive treatment, padding with urea, moisturizing before printing and fixation, the amount and existence of urea in the print paste, and two fixation methods. In all these experiments, Cibacron Red P 4B and Cibacron Blue P 3R, which have the same reactivity but different molecular sizes, are used as dyestuffs. The experiments done in the laboratory are repeated in industry, and the results are examined by comparing the color efficiencies, fastness rates, and tensile strengths of the printed fabrics.