Advances in the Evaluation of Sheet Structure of Paper

Abstract

This review article introduces some new methods to determine the structural parameters of paper sheets by the application of image analysis techniques. The major subjects are:(1) what kind of information can be obtained from the parallel- and cross-sectional images of pulp sheets, (2) structural analysis of filler loaded papers and the relationship between structure and sheet properties, and (3) some methods to evaluate the mass density distribution and fiber orientation distribution from soft X-ray radiograms of paper sheets.