Effects of Potassium Permanganate Decoloration on Denim Shade

Abstract

Three kinds of denims were treated by the use of KMnO4/H3PO4 solutions. The decoloration processes were controlled by processing time, KMnO4 and H3PO4 concentrations. The denim color shades before and after treatment were measured and compared. The results showed that the brightness of denim generally was enhanced by increasing processing time、KMnO4 and H3PO4 concentrations. Color shade changed depending on denim types.