Influence of additives on the fabric stiffness and colour depth of viscose printed with a guar gum thickener and a reactive dye

Abstract

The effect of additives in a printing paste containing guar gum thickener and bireactive dye for cellulose printing was studied. The efficiency of the additives with respect to their chemical structure and concentration and the efficiency in combination with thickeners of different types (nonsubstituted, different degrees of carboxymethylation) and different concentrations (solid content) was investigated by assessing the fabric stiffness, colour depth, dye penetration, the viscosity and viscoelasticity of the printing paste and the printing paste add‐on. Some additives caused a decrease in the fabric stiffness to an acceptable degree with little effect on the colour depth. Dye penetration was found to be exclusively additive‐dependent. Spectroscopic and rheological investigations confirmed the reduction of dye/guar gum interactions due to the occurrence of additive/guar gum and additive/dye interactions. The best quality prints were obtained using a printing past containing a nonionic surfactant and a highly carboxymethylated guar gum thickener.

Urea/alkali‐free printing of cotton with reactive dyes

“…Therefore, it was necessary to evaluate the per cent of dye penetration in correlation with the sharpness of the colour and its levelness. Previous studies have shown that dye penetration depends on the composition of the print paste and the lack of penetration can result in unlevelness [26,27].…”

“…Previous studies have shown that dye penetration depends on the composition of the print paste and the lack of penetration can result in unlevelness [26,27]. Therefore, it was necessary to evaluate the per cent of dye penetration in correlation with the sharpness of the colour and its levelness.…”

Mixture printing pastes from high substitued guar gum and alginates on reactive printing of viscose

“…It was reported that the combination of low substituted guar gums with bifunctional reactive dyes causes fabric stiffness, though printing of most monofunctional vinylsulphone reactive dyes with guar gums results in good printing quality and fabric handle. Fabric stiffness increases with guar gum thickener composed of high solid content, which decreases with an increase in the degree of carboxymethylation of the thickener 3, 4…”