PAPER making! FROM THE PUBLISHERS OF PAPER TECHNOLOGY INTERNATIONAL ® FROM THE PUBLISHERS OF PAPER TEC Volume 11, Number 2, 2025
Defining Features Of Decorating Sanitary-Hygienic Products By The Method Of Flexographic And Digital Printing SVITLANA HAVENKO 1 , VALENTYNA DOVHANYCH 1 & VIKTORIA KOCHUBEI 2 The intensive use of tissue products encourages manufacturers to search for new technologies for their decoration and researchers to study the factors influencing the quality of finished products. Flexographic printing is used to decorate sanitary and hygienic products, which is effective for large print runs. Digital printing is recommended for producing tissue products with small print runs. Therefore, the object of this study was flexographic and digital ink-jet imprints. As a result of the research, it was found that in the range from 50 to 100% of the printed control scale, the optical density of all CMYK colors on a flexographic imprint is twice as high as in digital printing. The optical density of digital imprints increases in proportion to the color saturation. The optimal amount of luminophore that provides the luminescence effect of printed images on flexographic imprints has been determined. In the process of printing, tissue paper is exposed to temperature conditions. Thermogravimetric studies of printing inks with luminophore additives and corresponding imprints were conducted. Initial thermo-oxidative processes in the ink composition begin to develop at temperatures above 187 °C. A slight loss of mass (1.1%) of the composition is observed in the range of 187–236 °C, which is accompanied by a deviation of the DTA channel into the region of exothermic effects due to the thermal oxidation of the luminophore. The influence of tissue products’ structure and printing area on punching resistance has been shown. Using the Kendall concordance coefficient, the degree of consistency of experts’ opinions regarding the priority of factors influencing the quality of tissue products was determined. Contact information: 1 Department of Printing Technologies and Packaging, Lviv Polytechnic National University, S. Bandery str., 12, Lviv, Ukraine, 79013. 2 Department of Physical, Analytical and General Chemistry, Lviv Polytechnic National University, S. Bandery str., 12, Lviv, Ukraine, 79013.
Eastern-European Journal of Enterprise Technologies 1/1 (133) 2025 https://doi.org/10.15587/1729-4061.2025.320495 Creative Commons Attribution 4.0 License
The Paper Industry Technical Association (PITA) is an independent organisation which operates for the general benefit of its members – both individual and corporate – dedicated to promoting and improving the technical and scientific knowledge of those working in the UK pulp and paper industry. Formed in 1960, it serves the Industry, both manufacturers and suppliers, by providing a forum for members to meet and network; it organises visits, conferences and training seminars that cover all aspects of papermaking science. It also publishes the prestigious journal Paper Technology International ® and the PITA Annual Review , both sent free to members, and a range of other technical publications which include conference proceedings and the acclaimed Essential Guide to Aqueous Coating .
Article 7 – Printing of Tissue
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