Prof. Svitlana Havenko Profile

Prof. Svitlana Havenko

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Proceedings Article | 5 January 2024 Paper

Study of flexographic imprints using the methods of optical and electron microscopy

Svitlana Havenko, Marta Labetska, Tetyana Telehina

Proceedings Volume 12938, 129380W (2024) https://doi.org/10.1117/12.3012269

KEYWORDS: Printing, Absorbance, Packaging, Electron microscopy, Color, Viscosity, Morphological analysis, Matrices, Image quality

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Today, flexographic printing technology is dominant in packaging production. Therefore, the research on factors affecting the quality of imprints obtained by flexographic printing, in particular on film materials, is relevant. A comparison of the quality of flexographic imprints on PET obtained at different printing speeds was made. Control charts for the measured imprint indicators (optical density, raster dot compression, contrast, print stability) were constructed. In the process of analysis, some deviations from the standards were found, in particular optical density, which can be related to the change in viscosity of the ink in the process of increasing the printing speed. Using optical and electron microscopy, the influence of the parameters and cell structure of the anilox roller on the shape and size of the raster dots on the imprint was investigated. Based on microscopic studies of the surface and morphological structure of the substrates, the influence of the surface topography of the film materials on the densitometric and colourimetric indicators of the printed images was confirmed. The analysis of the phenomena of the interaction of ink with the film material during the imprint’s formation in the process of high-speed printing was carried out. Using the method of morphological analysis, the effectiveness of the interaction of the main influencing factors on the quality of printed images on packaging made of film materials was determined. A multi-level hierarchical model has been developed, which takes into account the factors affecting the quality of flexographic imprints during the production of packaging.

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