Technical gazette, Vol. 22 No. 1, 2015.
Original scientific paper
https://doi.org/10.17559/TV-20140321230455
The influence of ink concentration and layer thickness on yellow colour reproduction in liquid electrophotography toner
Igor Majnarić
orcid.org/0000-0002-4447-8140
; University of Zagreb, Faculty of Graphic Arts, Getaldićeva 2, 10000 Zagreb, Croatia
Aleš Hladnik
orcid.org/0000-0003-2224-2919
; University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Textiles, Snežniška 5, 1000 Ljubljana, Slovenia
Tadeja Muck
; University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Textiles, Snežniška 5, 1000 Ljubljana, Slovenia
Ivana Bolanča Mirković
orcid.org/0000-0002-2503-8051
; University of Zagreb, Faculty of Graphic Arts, Getaldićeva 2, 10000 Zagreb, Croatia
Abstract
In liquid toner electrophotography, colour gamut is often diminished in the yellow region leading to problems with photo quality prints. It is known that the concentration of pigment particles in the printing ink and its thickness when applied on a paper substrate decisively influence final print quality. Variation of these two parameters for the yellow process ink was performed by modifying the printing process of the electrophotographic printer HP Indigo S1000. Printed colour patches of ECI test chart were analysed colorimetrically and using image analysis approach. Two-way analysis of variance was implemented to statistically assess the obtained results. Both studied responses – colour gamut volume and area coverage of halftone dots – were found to be primarily influenced by the yellow ink layer thickness and much less by the ink concentration. Increase from one to two ink layers had a significantly stronger effect on each of the two responses when compared to an additional increase from two to three layers.
Keywords
colour gamut; colour reproduction; halftone dots; liquid toner electrophotography; print quality; tone value
Hrčak ID:
135075
URI
Publication date:
23.2.2015.
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