P.h. Glatfelter Company

Robert A Olson

Lewin R Lutz, Iii

An improved paper for printing and other uses can be made from a paper pulp that contains pulp derived from hardwoods if the pulp is refined in a refiner that has at least one abrasive surface disk. The pulp can be refined to give a vessel picks count of 2/cm.sup.2 or less and have a Freeness of less than that which can be achieved using a refiner having conventional barred disks.

Method of paper making using an abrasive refiner for refining bleached

Method of making TiO.sub.2 --CaCO.sub.3 combinations without involving a chemical reaction, said combinations, containing up to 50% CaCO.sub.3 in the combination, having the same scattering coefficient in paper as 100% TiO.sub.2 and method of making opaque paper containing the resulting combination.

Growing community of inventors

York New Salem, PA, United States of America

Robert A Olson