Download (PDF 2.50 MB): https://research.fs.usda.gov/download/treesearch/24130.pdf
Abstract
Pulp quality, in terms of a fiber shape factor S and a fiber length factor L, was determiend for 96 pulps disk-refined from chips of varying characteristics. S was evaluated in terms of the Canadian Standard Freeness of the 48/100 fiber length fraction and is a parameter inversely proportional to specific surface. L is the percentage, by weight, of pulp retained on a 48-mesh screen and reflects the distribution by weight of fiber length in the whole pulp. S and L accounted for as much as 83 percent of the variation in handsheet properties. Properties were improved by using pulps displaying low values of S and relatively high valuyes of L. both S and L were related to specific refining energy and wood quality. S increased with increasing unextracted chip specific gravity and rings per inch of growth rate but decreased with increasing latewood content and refining energy. L decreased with increasing refining energy, rings per inch of growth rate, and unextracted chip specific gravy but increased with increasing latewood.
Citation
McMillin, Charles W. 1969. Quality of refiner groundwood pulp as related to handsheet properties and gross wood characteristics. Wood Science and Technology, Vol. 3: 287-300
