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The influence of squeegee parameters on ink deposit in UV halftone screen printing

Eifion Jewell Orcid Logo

TAGA Journal., Volume: 3, Issue: 2

Swansea University Author: Eifion Jewell Orcid Logo

Abstract

Screen printing with high build UV inks is prone to excess ink transfer (stacking) or insufficient ink transfer (skipping) in the second, third and fourth colours due to the rough surface provided by the first ink layer. An experimental investigation into the effect of squeegee material and squeegee...

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Published in: TAGA Journal.
Published: 2006
URI: https://cronfa.swan.ac.uk/Record/cronfa37706
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first_indexed 2017-12-21T13:45:51Z
last_indexed 2018-02-09T05:31:22Z
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spelling 2017-12-21T12:31:55.7227563 v2 37706 2017-12-21 The influence of squeegee parameters on ink deposit in UV halftone screen printing 13dc152c178d51abfe0634445b0acf07 0000-0002-6894-2251 Eifion Jewell Eifion Jewell true false 2017-12-21 MECH Screen printing with high build UV inks is prone to excess ink transfer (stacking) or insufficient ink transfer (skipping) in the second, third and fourth colours due to the rough surface provided by the first ink layer. An experimental investigation into the effect of squeegee material and squeegee pressure on the second colour ink transfer was undertaken using an innovative experimental technique. The technique involved printing the magenta ink at various press conditions through the magenta screen on top of a colourless base material through the yellow screen. Differences in the print density of the magenta as a result of squeegee material and pressure are then associated with changes in the magenta ink density only. Squeegees of 75 and 84 shore “A” hardness were used to print a conventional UV ink at 5 pressures from 2.5 to 4.5 bar on a poster and silk substrate. For halftone printing the degree of stacking was almost linearly related to the applied squeegee pressure, increasing the second colour density in a stepwise manner. The effect was most noticeable in the second colour mid tones and was greatest when the first “colour” was between 40% and 70%. An appreciable increase in ink density was also visible when the second colour solid was printed on any halftone or solid layer. This can in part be attributed to the base material acting like a transparent material. As the ideal conditions for limiting skipping / stacking varies with the percentage of the first colour printed, it is likely that this phenomena is present in all 4 colour UV screen printing. The findings are also relevant for the printing of multi layer fine lines and solid areas. Journal Article TAGA Journal. 3 2 1 9 2006 2006-09-01 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2017-12-21T12:31:55.7227563 2017-12-21T12:30:47.7528183 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Eifion Jewell 0000-0002-6894-2251 1
title The influence of squeegee parameters on ink deposit in UV halftone screen printing
spellingShingle The influence of squeegee parameters on ink deposit in UV halftone screen printing
Eifion Jewell
title_short The influence of squeegee parameters on ink deposit in UV halftone screen printing
title_full The influence of squeegee parameters on ink deposit in UV halftone screen printing
title_fullStr The influence of squeegee parameters on ink deposit in UV halftone screen printing
title_full_unstemmed The influence of squeegee parameters on ink deposit in UV halftone screen printing
title_sort The influence of squeegee parameters on ink deposit in UV halftone screen printing
author_id_str_mv 13dc152c178d51abfe0634445b0acf07
author_id_fullname_str_mv 13dc152c178d51abfe0634445b0acf07_***_Eifion Jewell
author Eifion Jewell
author2 Eifion Jewell
format Journal article
container_title TAGA Journal.
container_volume 3
container_issue 2
publishDate 2006
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 0
active_str 0
description Screen printing with high build UV inks is prone to excess ink transfer (stacking) or insufficient ink transfer (skipping) in the second, third and fourth colours due to the rough surface provided by the first ink layer. An experimental investigation into the effect of squeegee material and squeegee pressure on the second colour ink transfer was undertaken using an innovative experimental technique. The technique involved printing the magenta ink at various press conditions through the magenta screen on top of a colourless base material through the yellow screen. Differences in the print density of the magenta as a result of squeegee material and pressure are then associated with changes in the magenta ink density only. Squeegees of 75 and 84 shore “A” hardness were used to print a conventional UV ink at 5 pressures from 2.5 to 4.5 bar on a poster and silk substrate. For halftone printing the degree of stacking was almost linearly related to the applied squeegee pressure, increasing the second colour density in a stepwise manner. The effect was most noticeable in the second colour mid tones and was greatest when the first “colour” was between 40% and 70%. An appreciable increase in ink density was also visible when the second colour solid was printed on any halftone or solid layer. This can in part be attributed to the base material acting like a transparent material. As the ideal conditions for limiting skipping / stacking varies with the percentage of the first colour printed, it is likely that this phenomena is present in all 4 colour UV screen printing. The findings are also relevant for the printing of multi layer fine lines and solid areas.
published_date 2006-09-01T03:47:31Z
_version_ 1763752281478529024
score 11.012678

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