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Article

Determining the Print Quality Due to Deformation of the Halftone Dots in Flexography

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Department of Art Studies, University North, Trg dr. Žarka Dolinara 1, 48000 Koprivnica, Croatia
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Department for Packaging, Recycling and Environmental Protection, University North, Trg dr. Žarka Dolinara 1, 48000 Koprivnica, Croatia
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HON-ING d.o.o., Vrankovec bb, 49231 Sveti Križ Začretje, Croatia
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Department of Multimedia, University North, 104. Brigade 3, 42000 Varaždin, Croatia
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Author to whom correspondence should be addressed.
Academic Editor: Richard (Chunhui) Yang
Appl. Sci. 2021, 11(22), 10601; https://doi.org/10.3390/app112210601
Received: 10 October 2021 / Revised: 31 October 2021 / Accepted: 9 November 2021 / Published: 11 November 2021
This paper researches the issues related to the print quality in flexography, especially the influence of the print run and inadequate printing settings on dot deformation. Dot deformation can lead to inconsistencies in print quality, such as a loss of highlight tones or an unpredictable increase in tonal value. This research was conducted on two concrete examples of flexible packaging printed on transparent films. All significant parameters of dot deformation were evaluated, including dot coverage, dot sharpness and the uniformity of the ink density. The increase in the coverage values in the midtones was linear throughout the entire print run, while in the light tones, it was more logarithmic. The overall percentage deviations from the reference value were 6.3% in the midtones and 52.6% in the light area. The increase in dot coverage was due to the wear of the polymer plate, which caused the side shoulders of the dot to become a part of the printing surface. An analysis of the ink density showed a much more homogeneous shape of the dot at the beginning of the print run. The correct ratio of the anilox roller line screen to the line ruling of the printing plate is important in order to ensure a minimum dot size in print. View Full-Text
Keywords: dot deformation; flexible packaging; flexography; image analysis; print quality dot deformation; flexible packaging; flexography; image analysis; print quality
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MDPI and ACS Style

Valdec, D.; Hajdek, K.; Vragović, L.; Geček, R. Determining the Print Quality Due to Deformation of the Halftone Dots in Flexography. Appl. Sci. 2021, 11, 10601. https://doi.org/10.3390/app112210601

AMA Style

Valdec D, Hajdek K, Vragović L, Geček R. Determining the Print Quality Due to Deformation of the Halftone Dots in Flexography. Applied Sciences. 2021; 11(22):10601. https://doi.org/10.3390/app112210601

Chicago/Turabian Style

Valdec, Dean, Krunoslav Hajdek, Lucia Vragović, and Robert Geček. 2021. "Determining the Print Quality Due to Deformation of the Halftone Dots in Flexography" Applied Sciences 11, no. 22: 10601. https://doi.org/10.3390/app112210601

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