Improvement of Colour Fastness for Deep Blue Shade of Cotton Fabric

Cotton fabric was dyed by exhaust method with C.I. Reactive Blue 19 with various dye concentrations, followed by the treatments of soaping, dye fixing, and wet rubbing improving. The dye exhaustion, wash fastness, rubbing fastness, and colour difference of dyed cotton fabric were examined. The consequences demonstrate that the entire utilized textile auxiliaries did not cause a yellowness problem. After application of the dye fixative and wet rubbing improver, to the deep blue shade cotton (15% dye o.m.f), the wash fastnesses were all at grade 5, and at grade 5 and 4 of dry and wet of rubbing fastness respectively. The wet rubbing improver contributed to deep blue shade and promoted half grade in wet rubbing for all dye o.m.f.