Fig. 5From: Totally chlorine-free bleaching of prehydrolysis soda pulp from plantation hardwoods consisting of various lignin structuresBrightness and viscosity profiles during the totally chlorine-free (TCF) bleaching of E. globulus pulp (white unfilled bars: brightness; gray filled bars: viscosity). O—oxygen bleaching; Psa—peroxymonosulfuric acid treatment; Ep—alkali extraction with hydrogen peroxide bleachingBack to article page