The Purpose of this study was to investigate the color changes of acid dyed wool fabrics after imparting permanent pleats with si-ro-set finish. Monoethanolamine sulfite was used as a reducing agent. Color changes were determined by measuring CIELAB values after treating the dyed fabrics with various setting temperatures, times and concentrations of MEAS. Setting temperature affected the color changes: in the order of $150^{circ}C>130^{circ}C>170^{circ}C$ Setting time had a tendency to increase the color change. As the concentration of MEAS increased, $delta$ E was increased. Azo dye was more affected than anthraquinone dye by MEAS treatment. Color changes were mainly due to $delta$ L.