TOPOGRAPHIC MODELING OF ESTIMATES OF PAPER HETEROGENEITY DURING INK – PAPER INTERACTION

UDC 676.017

Zilbergleit Mark Aronovich – DSc (Chemistry), Professor, the Department of Technology of Inorganic Substances and General Chemical Technology. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: mazi@list.ru

Midukov Nikolay Petrovich − DSc (Engineering), Associate Professor, Head of the Department of Engineering Graphics and Computer-Aided Design. St. Petersburg State University of Industrial Technologies and Design (V-409, 4, Ivan Chernykh str., 198095, St. Petersburg, Russian Federation). E-mail: gturpigap@ bk.ru

Marchenko Irina Valentinovna – Master, Senior Lecturer, the Department of Printing Production. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: Marchenko_i_v@belstu.by

Grudo Sergey Kazimirovich − PhD (Engineering), Assistant Professor, the Department of Printing Equipment and Information Processing Systems. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: grudo@belstu.by

 

DOI: https://doi.org/10.52065/2520-6729-2024-285-4.

Key words: paper heterogeneity, paints, clearance, reflection, model, standard deviation, entropy, fractal dimension.

For citation: Zilbergleit М. А., Midukov N. P., Marchenko I. V., Grudo S. K. Topographic modeling of estimates of paper heterogeneity during ink – paper interaction. Proceedings of BSTU, issue 4, Print- and Mediatechnologies, 2024, no. 2 (285), pp. 28–38 (In Russian). DOI: 10.52065/2520-6729-2024-285-4.

Abstract

In this study, topographic modeling was performed to assess paper non-homogeneity, as well as possible results of paper – paint interaction. The model was based on the provision on the absorption of light by the “black body”. The surface of the paper is considered as a texture with different grooves, and as the depth of the grooves increases, the reflection of light incident on the surface decreases. On the other hand, by analyzing the paper lumen using optical microscopy techniques, it can be assumed that the decrease in light absorption is due to the non-uniformity of the paper structure due to both the manufacturing technique and the properties of the paper fiber. Despite the different mechanism of interaction of light with the surface of paper and paper as an array with defects in the structure, data processing methods are no different. Various topographic models of heterogeneous images and methods of their control are considered. Along with such a traditional indicator as standard deviation (dispersion), such parameters as entropy, the distribution of inhomogeneous regions by size and by their number, the deviation of the geometric center of the image from the center of mass should be considered. The measure of fractal dimension requires further study as a way to control for heterogeneity. When considering the model for assessing print quality, the use of topographic modeling involves taking into account the standard deviation, calculating the number of areas with the same gray brightness and, accordingly, their average size.

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15.07.2024