THE SPECIFIC PERIMETER OF FIBER FLOCS - A CRITERION OF PAPER FORMATION

The quality of paper formation is usually evaluated in terms of the co efficient of variation (COV) or the specific perimeter (SP). The COV o f the mass distribution: in a sheet pf paper is estimated by measuring the intensity of transmitted light. In this study: we have shown that the COV was significantly influenced by the opacity, the light-scatte ring coefficient and the density of the paper. The Sp, which is a meas ure of the floc size in paper, was found to be independent of changes in the paper opacity but dependent on the change in sheet density.