1. КК
  2. № 1 (47) / 2025
  3. Study of the Influence of Thermal Plates Properties on the Quality of Offset Imprints

Study of the Influence of Thermal Plates Properties on the Quality of Offset Imprints

КК.
2025;
Volume 1 (47), 2025, Number 1 (47)
: pp. 39 - 47
https://doi.org/10.32403/2411-3611-2025-1-47-39-47
Authors:
  1. V. V. Bernatsek
  2. N. V. Vladyka
  3. R. P. Marchuk
  4. T. V. Vladyka
1
Lviv Polytechnic National University Institute of Printing Art and Media Technologies
2
Lviv Polytechnic National University Institute of Printing Art and Media Technologies
3
Lviv Polytechnic National University Institute of Printing Art and Media Technologies
4
Lviv Polytechnic National University Institute of Printing Art and Media Technologies

In today’s conditions of rapid development in the printing industry, the quality of printed products is determined not only by design or functionality, but primarily by the accuracy of image reproduction following the author’s original. One of the most important factors affecting the reproductive quality of offset printing is the stability and pre­dictability of the colour transfer process, considering the characteristics of the printing plates used. In this regard, research aimed at studying the influence of thermal offset plate types on the accuracy and stability of tonal reproduction of inks, as well as on the conformity of imprints to colour proofs, becomes particularly significant. The article presents an experimental verification of imprint conformity to reference samples, analyses tonal reproduction and colour stability.
It has been established that plates with high resolution and screen ruling (up to 3200 dpi and 450 lpi respectively) provide the best quality reproduction of fine elements and gradations. A mathematical model has been developed which describes the influence of key plate characteristics on the printing result. The greatest positive contribution to reproduction quality is provided precisely by resolution and screen ruling. The results can be used for selecting optimal materials in prepress preparation and implementing quality control systems in offset production.

offset printing
thermal plates
reproduction and graphic characteristics
gradation transfer
optical density
printing quality
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