engleski

The influence of impurities in printing substrate on the deformation of screen element and dot gain in coldset print

Newspaper print (coldset), because of the most economic production, became quantitatively the most used print technology for the daily, weekly and monthly printed media on the market. A variety of different factors affect the appearance and quality of printed product, some of which are of crucial importance and should be monitored during the whole print run - print density and dot gain of screen elements. Newspaper print can be considered of satisfactory quality if all of the screen elements were reproduced correctly. In this research the influence of geometrical and optical deformation of hybrid screen elements on the printing quality was analyzed, results of the valorised deformation of halftone values that are in a direct connection to gained quality were compared. Also, the printing densities in the print run were analyzed by densitometric and spectrophotometric methods. The emphasis in this research is on the cyan colour component, since these screen elements clearly show the influence of impurities in printing substrate on deformation of screen element and dot gain. The observed characteristics were valorised by scientific methods and presented by graphic overviews. The impact of prevailing, recycled printing substrate on printing quality was determined.

dot gain; newspaper print; recycled printing substrate; reproduction quality

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