THE EFFCTS OF NON-IONIC SURFACTANTS ON DYEING WITH DIRECT DYES

Studies on Interaction of Non-Ionic Surfactants with Some Acid Dyes by Spectrophotometric Method

The interaction of non-ionic surfactants in aqueous solutions containing some acid dyes has been studied spectrophotometrically. The spectral shift suggests that interaction decreases with increase in sulfonic acid grpup and increases. with ~crease in the hydrophobic character of the dye molecule as well as with increase in the number of ethylene oXIde umt of the surfactants, The results are ex...

Dyeing with Disperse Dyes

Before the First World War, almost all dyes were applied from solution in an aqueous dyebath to substrates such as cotton, wool, silk and other natural fibres. However, the introduction of a man-made fibre, cellulose acetate, with its inherent hydrophobic nature, created a situation where very few of the available dyes had affinity for the new fibre. Water-soluble anionic dyes had little substa...

The Influence of Cationization on the Dyeing Performance of Cotton Fabrics with Direct Dyes

The effect of cationic modification of cotton fabrics, using cationic agent (Chromatech 9414) on direct dyeing characteristics was studied in this work. Cationization of cotton fabric at different conditions (pH, cationic agent concentration, temperature and time) was investigated and the optimum conditions were determined . Nitrogen content of cotton samples pretreated with cationic agent was ...

Dyeing of Indian wool with reactive dyes

Wool fibres have been chemically modified by reduction I chlorination under acidic pH Ipre-swelling in conc. formic acid prior to their dyeing with indigenous reactive dyes of different molecular configurations to enhance the reactive dye uptake on wool fibre substrate. The pretreatment processes are inexpensive, less harmful and less time consuming as against the use of imported special wool r...

Dyeing of Textiles with Natural Dyes