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Printing Gloss Effects in a 2.5D System

Baar, Teun and Samadzadegan, Sepideh and Brettel, Hans and Urban, Philipp and Segovia, Maria V. Ortiz (2014):
Printing Gloss Effects in a 2.5D System.
In: Proceedings of SPIE; 9018, SPIE Press, Bellingham, In: Measuring, Modeling, and Reproducing Material Appearance, pp. 90180M-1-90180M-8, DOI: 10.1117/12.2039792,
[Conference or Workshop Item]

Abstract

An important aspect for print quality assessment is the perceived gloss level across the printout. There exists a strong relationship between the surface roughness of a printout and the amount of specular reflection which is perceived as gloss variations. Different print parameters influence the surface roughness of the printouts such as the paper substrate, the type of inks and the print method. The lack of control over the print's surface roughness may result in artifacts such as bronzing and differential gloss. Employing a 2.5D or relief printing system, we are able to control the printout roughness by manipulating the way the ink is deposited in a layer-by-layer basis. By changing the deposition time in between two layers of white ink and the order on which the pixels are printed, we achieve different gloss levels from a matte to a glossy appearance that can be controlled locally. Understanding the relationship between different printing parameters and the resulting gloss level allows us: to solve differential gloss artifacts (to obtain a print with a full gloss or matte finish) and to use the local gloss variations to create reflection effects in the printouts. Applications related to security printing have also been explored. Our results showed a reduced level of gloss toward a matte appearance as the ink deposition time between the layers was increased, allowing more time for the ink to dry between passes. We measured the gloss levels using a gloss meter and a psychophysical experiment was conducted to validate our measurements and observations.

Item Type: Conference or Workshop Item
Erschienen: 2014
Creators: Baar, Teun and Samadzadegan, Sepideh and Brettel, Hans and Urban, Philipp and Segovia, Maria V. Ortiz
Title: Printing Gloss Effects in a 2.5D System
Language: English
Abstract:

An important aspect for print quality assessment is the perceived gloss level across the printout. There exists a strong relationship between the surface roughness of a printout and the amount of specular reflection which is perceived as gloss variations. Different print parameters influence the surface roughness of the printouts such as the paper substrate, the type of inks and the print method. The lack of control over the print's surface roughness may result in artifacts such as bronzing and differential gloss. Employing a 2.5D or relief printing system, we are able to control the printout roughness by manipulating the way the ink is deposited in a layer-by-layer basis. By changing the deposition time in between two layers of white ink and the order on which the pixels are printed, we achieve different gloss levels from a matte to a glossy appearance that can be controlled locally. Understanding the relationship between different printing parameters and the resulting gloss level allows us: to solve differential gloss artifacts (to obtain a print with a full gloss or matte finish) and to use the local gloss variations to create reflection effects in the printouts. Applications related to security printing have also been explored. Our results showed a reduced level of gloss toward a matte appearance as the ink deposition time between the layers was increased, allowing more time for the ink to dry between passes. We measured the gloss levels using a gloss meter and a psychophysical experiment was conducted to validate our measurements and observations.

Series Name: Proceedings of SPIE; 9018
Publisher: SPIE Press, Bellingham
Uncontrolled Keywords: Business Field: Virtual engineering, Business Field: Visual decision support, Research Area: Computer vision (CV), Research Area: Computer graphics (CG), Research Area: Modeling (MOD), Reflectance, 2.5D Printing, Optical perception
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Interactive Graphics Systems
Event Title: Measuring, Modeling, and Reproducing Material Appearance
Date Deposited: 12 Nov 2018 11:16
DOI: 10.1117/12.2039792
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