Effect of H2O2 concentration and duration of bleaching
Data of color values of turmeric fiber obtained by bleaching with
different H2O2 concentration and duration of bleaching are shown in Table 9. The
color of turmeric fiber obtained was significantly lighter from bleaching with
increasing concentration of H2O2 solution from 4.1 to 14.5 M. Effect of duration of
bleaching on color value was also considered. The color of turmeric fiber obtained
was significant lighter with increasing duration of bleaching (p0.05). Hence, the duration of bleaching selected for this study was 60–90
min and H2O2 concentration was 14.5 M.