The invention relates to a process for regulating the porosity and printing properties
of paper, in particular uncoated wood-containing paper such as SC-paper, wherein
a sufficient quantity of colloidal PCC having a BET surface area of 10-100 m2/g
is used as a filter in the paper to achieve a desired porosity of the paper; as
well as paper containing colloidal PCC as filler, and a pigment mixture suitable
for paper manufacture and containing colloidal PCC.
