Weber, Carl Fridolin (2024)
Studies on Gloss of Printed Surfaces.
Technische Universität Darmstadt
doi: 10.26083/tuprints-00026741
Ph.D. Thesis, Primary publication, Publisher's Version
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Item Type: | Ph.D. Thesis | ||||
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Type of entry: | Primary publication | ||||
Title: | Studies on Gloss of Printed Surfaces | ||||
Language: | English | ||||
Referees: | Dörsam, Prof. Dr. Edgar ; Khanh, Prof. Dr. Tran Quoc | ||||
Date: | 27 March 2024 | ||||
Place of Publication: | Darmstadt | ||||
Collation: | 214 Seiten | ||||
Date of oral examination: | 28 February 2024 | ||||
DOI: | 10.26083/tuprints-00026741 | ||||
Abstract: | This scientific work investigates the gloss of printed metallized surfaces. In the first part of the study, three different gloss meters - the micro-TRI-gloss by Byk Gardner, the IQ-S by Rhopoint, and the Surface Reflectance Analyzer by Canon - are examined and compared regarding their suitability in measuring the gloss of printed metallized samples. The advantages and disadvantages of these different gloss meters are highlighted, and their suitability for conducting gloss measurements in this context of this dissertation is evaluated. The work also delves into the printing of aluminum pigments and explores how different print parameters affect gloss. The focus is primarily on flexo printing using UV printing inks containing aluminum pigments. The impact of the time interval between printing of the UV-inks and curing on gloss is analyzed. This investigation of dynamic gloss considers the change in gloss per time unit. The change rate depends on the ink types, pigment varieties, and substrates used. Furthermore, an analysis of the topography of pigment layers on metallized samples, with varying time intervals between the printing and curing of UV-inks, is conducted. These findings are then transferred to an industrial printing press, examining the influence of the time gap between printing and curing the UV-inks and the use of hot air on gloss. Additionally, the effect of primer application on gloss is analyzed. Finally, the results of a psychophysical experiment dealing with the perception of gloss of printed metallic samples are discussed. Two different sets of samples were evaluated by amateurs and experts from the printing industry with regard to their gloss, metallic character, perceived roughness, image sharpness of the reflection and brightness. The obtained rankings were compared with each other and correlated with the measured values of a gloss meter. |
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Status: | Publisher's Version | ||||
URN: | urn:nbn:de:tuda-tuprints-267415 | ||||
Classification DDC: | 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering | ||||
Divisions: | 16 Department of Mechanical Engineering > Institute of Printing Science and Technology (IDD) | ||||
Date Deposited: | 27 Mar 2024 13:29 | ||||
Last Modified: | 02 Apr 2024 10:59 | ||||
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/26741 | ||||
PPN: | 516703161 | ||||
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