Soaking fibers in 12–17.5 wt% sodium hydroxides (NaOH) solution for 2 h in order to raise the surface area of cellulosic fibers, and to make it more susceptible to hydrolysis.
B.
Hydrolysing the fibers with hydrochloric acid (HCL) solution for 1 M at 60–80 °C to solubilize the hemicelluloses.
C.
Treating the fibers with 2 wt% NaOH solution for 2 h at 60–80 °C would disrupt the lignin structure, and would also breakdown the linkages between carbohydrate and lignin.