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Print quality study of a laboratory offset press
Dalarna University, School of Technology and Business Studies, Graphic/Arts Technology.
Dalarna University, School of Technology and Business Studies, Graphic/Arts Technology.
2004 (Swedish)Independent thesis Basic level (degree of Bachelor)Student thesis
Abstract [sv]

PAPRO operates within the Forest Research company and their mission is to develop value-adding industry solutions. At present there are no good ways for mills to easily test the printing quality on newsprint paper. There is a great need for a fast way to do this on different paper qualities; with a laboratory- offset press this can be both a time and money saving method. At PAPRO Forest Research, New Zealand, a laboratory offset press has been developed and designed, during the past seven years, concerning this issue. Earlier projects were made concerning the press, e.g. to establish the optimal settings. The mission with this project was to partly determine the present variability of the print quality and to evaluate if the fountain solution, distilled water and 2% Diol green concentrate, used at the moment mixed with different percentages of Isopropanol could decrease the variability and contribute to more stabile results. Throughout the whole project the print quality showed a high variation and was even more variable when the Isopropanol was added. All in all 50 print rounds times twelve printed paper strips was carried out through the project divided into three parts. To analyse the print quality, a microscope with an image capture camera has been used. Data from the taken images was analysed and inserted into charts to see the variations. The conclusions of the whole project are not satisfying because no final evaluations were possible to make. Main conclusions are that the additive of Isopropanol to the ordinary fountain solution, used at present, only contributed to more unstable results of the print quality. And it seems to be difficult to get some stable results from the lab press as long as the room where it is placed is not fully conditioned as required for the process of offset printing. And the fact that the airbrush which applies the amount of fountain solution is also variable, as shown in earlier projects, which contributes to unstable results as well. For further work more exact parameters as a conditioned room are required and the possibility to further design the laboratory press to use waterless offset printing instead.

Place, publisher, year, edition, pages
Borlänge, 2004. , 75 p.
Keyword [sv]
Offset, Fuktvatten, IGT, Bildanalys, Rasterpunkter, Isopropanol, Standard avvikelser
Identifiers
URN: urn:nbn:se:du-3523OAI: oai:dalea.du.se:3523DiVA: diva2:518477
Uppsok
Technology
Supervisors
Available from: 2008-11-26 Created: 2008-11-26 Last updated: 2012-04-24Bibliographically approved

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12126316f3a4d944938ccb5ebdad85eaf5c587f1086c8b8d4567796cc6ade80ec2e43a1025390cfdb703eda77dba700e0451b6372e95aa2c4d1a9302a05e0861
Type fulltextMimetype application/pdf

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf