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Effect of impression pressure and anilox specification on solid and halftone density

David Bould, Simon Hamblyn, David Gethin Orcid Logo, Tim Claypole, Tim Claypole Orcid Logo

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, Volume: 255, Issue: 5, Pages: 699 - 709

Swansea University Authors: Simon Hamblyn, David Gethin Orcid Logo, Tim Claypole Orcid Logo

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DOI (Published version): 10.1177/2041297510394072

Abstract

Controlling the transfer of ink to the substrate is a key requirement of the flexographicprinting process. Its ability to transfer ink from the image carrier to the substrate at low pressuresenables the process to be used for the production of printed matter using pressure-sensitivematerials. These...

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Published in: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
Published: 2011
Online Access: http://pib.sagepub.com/content/225/5/699
URI: https://cronfa.swan.ac.uk/Record/cronfa12740
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spelling 2011-10-01T00:00:00.0000000 v2 12740 2012-09-19 Effect of impression pressure and anilox specification on solid and halftone density bba3b0d7286855a0a1da5c751f14cc71 Simon Hamblyn Simon Hamblyn true false 20b93675a5457203ae87ebc32bd6d155 0000-0002-7142-8253 David Gethin David Gethin true false 7735385522f1e68a8775b4f709e91d55 0000-0003-1393-9634 Tim Claypole Tim Claypole true false 2012-09-19 EEN Controlling the transfer of ink to the substrate is a key requirement of the flexographicprinting process. Its ability to transfer ink from the image carrier to the substrate at low pressuresenables the process to be used for the production of printed matter using pressure-sensitivematerials. These can range from substrates where high pressures can damage surface structure(e.g. corrugated board), to specialist inks, which can be damaged by the high shearing actionassociated with other volume print processes. This paper evaluates the effect of pressure changeson print quality for different anilox specifications and line rulings on the plate.Data collected from an experimental print trial were used to quantify the effects of aniloxroll specifications, dot pitch, and plate-to-substrate engagement on the reproduction of both acontinuous ink film and the formation of discrete halftone dots.The ink-carrying volume of the cells of the anilox roll was shown to have the greatest influenceon solid density (a parameter used as an indirect measure of ink film thickness) and halftonedot formation; however, the geometrical characteristics of the cells were also shown to havean effect. An initial increase in the pressure within the printing nip resulted in a significantrise in both solid density and tone gain (growth of the halftone dots) due to improved inktransfer from the plate to the substrate. Subsequent increases in pressure produced little furtherincrease of solid density, indicating ink transfer had reached a plateau. The rate of increase ofhalftone density was found to be reduced as pressure increased, which was attributed to the inkapproaching its maximum capability for spreading on the substrate. Journal Article Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 255 5 699 709 Flexography, ink transfer, anilox 31 5 2011 2011-05-31 10.1177/2041297510394072 http://pib.sagepub.com/content/225/5/699 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2011-10-01T00:00:00.0000000 2012-09-19T10:14:51.9806707 College of Engineering Engineering David Bould 1 Simon Hamblyn 2 David Gethin 0000-0002-7142-8253 3 Tim Claypole 4 Tim Claypole 0000-0003-1393-9634 5
title Effect of impression pressure and anilox specification on solid and halftone density
spellingShingle Effect of impression pressure and anilox specification on solid and halftone density
Simon Hamblyn
David Gethin
Tim Claypole
title_short Effect of impression pressure and anilox specification on solid and halftone density
title_full Effect of impression pressure and anilox specification on solid and halftone density
title_fullStr Effect of impression pressure and anilox specification on solid and halftone density
title_full_unstemmed Effect of impression pressure and anilox specification on solid and halftone density
title_sort Effect of impression pressure and anilox specification on solid and halftone density
author_id_str_mv bba3b0d7286855a0a1da5c751f14cc71
20b93675a5457203ae87ebc32bd6d155
7735385522f1e68a8775b4f709e91d55
author_id_fullname_str_mv bba3b0d7286855a0a1da5c751f14cc71_***_Simon Hamblyn
20b93675a5457203ae87ebc32bd6d155_***_David Gethin
7735385522f1e68a8775b4f709e91d55_***_Tim Claypole
author Simon Hamblyn
David Gethin
Tim Claypole
author2 David Bould
Simon Hamblyn
David Gethin
Tim Claypole
Tim Claypole
format Journal article
container_title Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
container_volume 255
container_issue 5
container_start_page 699
publishDate 2011
institution Swansea University
doi_str_mv 10.1177/2041297510394072
college_str College of Engineering
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hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
url http://pib.sagepub.com/content/225/5/699
document_store_str 0
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description Controlling the transfer of ink to the substrate is a key requirement of the flexographicprinting process. Its ability to transfer ink from the image carrier to the substrate at low pressuresenables the process to be used for the production of printed matter using pressure-sensitivematerials. These can range from substrates where high pressures can damage surface structure(e.g. corrugated board), to specialist inks, which can be damaged by the high shearing actionassociated with other volume print processes. This paper evaluates the effect of pressure changeson print quality for different anilox specifications and line rulings on the plate.Data collected from an experimental print trial were used to quantify the effects of aniloxroll specifications, dot pitch, and plate-to-substrate engagement on the reproduction of both acontinuous ink film and the formation of discrete halftone dots.The ink-carrying volume of the cells of the anilox roll was shown to have the greatest influenceon solid density (a parameter used as an indirect measure of ink film thickness) and halftonedot formation; however, the geometrical characteristics of the cells were also shown to havean effect. An initial increase in the pressure within the printing nip resulted in a significantrise in both solid density and tone gain (growth of the halftone dots) due to improved inktransfer from the plate to the substrate. Subsequent increases in pressure produced little furtherincrease of solid density, indicating ink transfer had reached a plateau. The rate of increase ofhalftone density was found to be reduced as pressure increased, which was attributed to the inkapproaching its maximum capability for spreading on the substrate.
published_date 2011-05-31T03:22:26Z
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