STUDY OF IMAGE MICRO-LINES REPRODUCTION QUALITY ONTO DIGITAL OFFSET PRINTING PLATES

Abstract

The quality of reproduction of binary image elements in the computerto-plate systems is very important for high quality of prints. Accurate reproduction of printing elements is of a particular importance in order to print a wide range of high-quality documents with fine image elements or micro-lines. This paper presents the results obtained from the study on the quality of the micro-line reproduction using computer-to-plate systems and thermo-sensitive printing forms produced in these systems applying IR (infrared, 830 nm wavelength) laser technologies.
The quality of reproduction of micro-lines on the printing forms, as well as on the final version of the printed document on the print material, is determined by a number of factors such as parameters of the computerto-plate recording system, properties of the printing forms, etc. The aim of this study is to evaluate the quality and accuracy of the reproduction of the micro-lines taken into consideration the nature of the printing forms when the micro-lines are arranged parallel or perpendicular to the direction of the image recording.