NC State
P. Bergh and P. Luner. The application of image analysis to evaluate small scale basis weight variations in paper. In The role of fundamental research in paper-making, Trans. of the VIIth Fund. Res. Symp. Cambridge, 1981, (Fundamental Research Committee, ed.), pp 707–722, FRC, Manchester, 2018.


An image analysis technique was developed by means of which the mass distribution of paper was characterised by measurements of the light transmitted through it. To establish the ability of the image analyser to assess the mass distribution accurately, comparisons were made with the established method of beta-radiography. On the basis of these comparisons it was concluded that the small scale mass distribution can be assessed by image analysis of the light transmitted through paper.

The remaining aspects of the study demonstrate applications of the image analysis technique which include: analysing the variation in the mean and variance of the optical densities of different commercial newsprint samples: investigating the relationship between the mass distribution of newsprint and machine type: and comparing this with other methods used to evaluate mass distribution and formation of paper.

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