parameters for the cellulose is the viscosity. The viscosity
of the cellulose is measured by using a capillary viscose
meter of the cellulose dissolved in Cu(EtNH2)2. Three
different LS types have been studied here, LS750, LS850, and
LS1200, where the subscript numbers indicate the viscosity
numbers measured for the corresponding cellulose. The low
viscosity cellulose have been obtained at digestion temperatures
in the range 140-145 °C and the high viscosity
cellulose are obtained at digestion temperatures in the range
125-130 °C. The variation of the Ca2+/SO2 ratio in these
digestion procedures is also important because a variation