ANALYSIS OF THE DEPENDENCE OF PRODUCT QUALITY ON THE SURFACE PROPERTIES OF PAPER AND PRINT PARAMETERS

UDC 676.22

  • Babakhanova Khalima Abishevna − DSc (Engineering), Professor, the Department of Technology of Printing and Packaging Processes. Tashkent Institute of Textile and Light Industry (5, Shokhzhakhon str., 100100, Tashkent, Republic of Uzbekistan). E-mail: halima300@inbox.ru

  • Galimova Zulfiya Kamilovna − DSc (Philosophy), Assistant Professor, the Department of Technology of Printing and Packaging Processes. Tashkent Institute of Textile and Light Industry (5, Shokhzhakhon str., 100100, Tashkent, Republic of Uzbekistan). E-mail: z.galimova8282@mail.ru

  • Abdunazarov Mansur Mekhridinovich − Senior Lecturer, the Department of Technology of Printing and Packaging Processes. Tashkent Institute of Textile and Light Industry (5, Shokhzhakhon str., 100100, Tashkent, Republic of Uzbekistan). E-mail: abdunazarov.1977@mail.ru

  • Gromyko Irina Grigor’yevna − PhD (Engineering), Associate Professor, Head of the Department of Printing Production. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: gromyko@belstu.by

DOI: https://doi.org/10.52065/2520-6729-2022-255-1-5-13

Key words: roughness, printing plate, color reproduction quality, atomic force microscopy, optical density, contrast.

For citation: Babakhanova Kh. A., Abdunazarov M. M., Galimova Z. K., Gromyko I. G. Analysis of the dependence of product quality on the surface properties of paper and printing parameters. Proceedings of BSTU, issue 4, Print- and Mediatechnologies, 2022, no. 1 (255), pp. 5–13 (In Russian). DOI: https://doi.org/10.52065/2520-6729-2022-255-1-5-13.

Abstract

The article presents the results of the influence of the surface properties of paper and speed on the quality of reproduction of offset prints. The direct method of atomic force microscopy was used to study the surface properties of paper. The roughness of the paper was studied on the scanning probe microscope Solver HV, as a result of which topographic images, the profile of the relief of the surface of the paper were constructed and the average values of the roughness Ra were calculated. To study the effect of the surface properties of paper on the quality of reproduction, impressions were obtained on a Heidelberg SM-74 sheet offset printing machine. To identify the relationship between the roughness of the paper surface and the optical density of the impression, a stepwise gradation transition was studied, and the identity of the surface structure was determined. The influence of the paper structure on the values of the optical density of prints and on the quality of printed products is investigated. The resulting prints are characterized by the same thickness of the paint layer that has passed from the mold to the surface of the material being sealed. On paper with less roughness, full contact with the printing plate provided a print contrast in the range from 0.45 to 0.50, which is typical of standard coated glossy paper.

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10.01.2021