xmlui.ArtifactBrowser.SimpleSearch.filter.source:Scientific papers of the University of Pardubice. Series A, Faculty of Chemical Technology. 17/2011
ISSN:1211-5541
Abstract:
Screen printing is one of the oldest printing processes. While its theory and tools
did not change significantly, the technology underwent a considerable
improvement during its history, and continues to develop in the 21st century as
well. Screen printing allows deposition of a thick layer of ink onto the substrate,
enabling the use of ideally any kind of substrate. In the case of this technology it
is increasingly important to choose the right screen ruling according to the
estimated viewing distance. Despite the significant technological development,
halftone screen printing remains a challenge. Factors influencing quality are in
close interaction with each other. For the optimal output it is necessary to control
these factors more or less independently to produce high density screen prints in
high quality. Tone values of the screen print are primarily influenced by the density
of the mesh and thread weight. In practice the smallest dot will determine the
usable highest screen ruling. In our research we investigated the effect of screen ruling on print quality. Test charts were printed on PVC and PP substrates using
36 l cm–1 and 60 l cm–1 screens ruling. Optical measurements were performed to
determine density values, TVI curves, gamut volume to investigate the factors
influencing tone reproduction quality. Magnified images were used to evaluate
substrate-ink interaction.
