Dyeing of Jute Fabric Using Indigosol Dyes

Bleached jute fabric has been dyed with three indigosol dyes, namely Indigosol Violet I4R, Indigosol Golden Yellow IGK, and Indigosol Blue O4B, having different sensitivity to oxidation. Development stage (i.e., oxidation, neutralization, and soaping of the dyed fabric) plays the most important role for dyeing of jute fabric with indigosol dyes. Concentrations of chemicals in different processing steps such as sodium nitrite in the dye bath, sulphuric acid in the developing bath, sodium carbonate in the neutralization bath, and non-ionic surface active agent in the soaping bath have been optimized. Color yield and fastness properties are found to be better if dyeing and developing steps are carried out separately. Retention of tensile strength of indigosol-dyed jute fabric is sufficient enough for its further use in making diversified and value-added products. Moreover, the handle property of the indigosol-dyed jute fabric is found to be good.