K/S values of both back and front side of indigo dyed fabrics are shown in Figs. 6 and 7respectively. Highest K/S values were measured in the case of Fe mordanted fabrics for both back and front side of indigo dyed fabrics. For all fabrics, highest K/S values were gained from front side of indigo dyed fabrics, which was caused by indigo dye. K/S values of back side of indigo dyed fabrics were observed higher than the cotton fabrics.