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Badanie szorstkości powierzchni papierów ze znakami wodnymi

Kyrychok T., Klymenko T., Malkush N.

Przegląd Papierniczy

2012

R. 68, nr 7

414-417

Celem prezentowanej pracy było zbadanie szorstkości powierzchni papierów ze znakami wodnymi poprzez zastosowanie metody profilometrii.

The paper with watermarks is very special material for printing due to difference in characteristics for areas with watermarks and without latter. During forming of watermarks a paper thickness changes on a Papermaking machine, and calendering influences on different areas of a sheet differently, that is why it is possible to assume that a paper roughness on different areas differs substantially. Surface microgeometry can be characterized by deviation of roughness from the middle line of shape or maximal height of shape inegualities and distance between them (by the wave step). The estimation of shape inequalities of surface can be carried out by the method of profilometry. This method is based on the contact analysis of paper surface area by a thin needle which enables to get the increased image of surface shape by profilometer. In such devices the surface is analyzed by a diamond needle with the radius of rounding of 10-12,5 pm.