Brightness Analysis
Mechanical pulp sheets were made for each of the
types of bagasse for determining the influence of
bagasse quality upon brightness. The results,
obtained with a Datacolor ELREPHO designed
specifically for the use of the paper industry, are
shown in Fig. 7 where the difference between the
initial brightness values and the fact that the
depithing operation notably influences on this
parameter can be observed.
Regarding the brightness behavior during storage,
it should be noted that in the cases of mechanical
pulp sheets from wet baled bagasse (“IN” and
“DH”), a marked decrease is noted with few
differences. In the case of pre-dried depithed
bagasse (“PR”), no significant change was
observed.