Abstract
The quality of a printed product can in many cases be controlled if the extent of liquid penetration into the sheet structure and the various parameters affecting it are well known. There is, however, a lack of a sufficiently sensitive method for the determination of minute amounts of ink in the sheet and this makes studies on the interaction of paper with ink difficult. The approach to fill this gap, described now, consists of the determination of the ink concentration profile across the thickness of a paper after application of radioactively labelled ink on one side and stripping ultra-thin sections from the opposite side of the paper.
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