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Proceedings Paper

Study the effect of gray component replacement level on reflectance spectra and color reproduction accuracy
Author(s): I. Spiridonov; M. Shopova; R. Boeva
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Paper Abstract

The aim of this study is investigation of gray component replacement (GCR) levels on reflectance spectrum for different overprints of the inks and color reproduction accuracy. The most commonly implemented method in practice for generation of achromatic composition is gray component replacement (GCR). The experiments in this study, have been performed in real production conditions with special test form generated by specialized software. The measuring of reflection spectrum of printed colors, gives a complete conception for the effect of different gray component replacement levels on color reproduction accuracy. For better data analyses and modeling of processes, we have calculated (converted) the CIEL*a*b* color coordinates from the reflection spectra data. The assessment of color accuracy by using different GCR amount has been made by calculation of color difference ΔE* ab. In addition for the specific printing conditions we have created ICC profiles with different GCR amounts. A comparison of the color gamuts has been performed. For a first time a methodology is implemented for examination and estimation of effect of GCR levels on color reproduction accuracy by studying a big number of colors in entire visible spectrum. Implementation in practice of the results achieved in this experiment, will lead to improved gray balance and better color accuracy. Another important effect of this research is reduction of financial costs of printing production by decreasing of ink consumption, indirect reduction of emissions during the manufacture of inks and facilitates the process of deinking during the recycling paper.

Paper Details

Date Published: 15 March 2013
PDF: 10 pages
Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 87700W (15 March 2013); doi: 10.1117/12.2011922
Show Author Affiliations
I. Spiridonov, Univ. of Chemical Technology and Metallurgy (Bulgaria)
M. Shopova, Univ. of Chemical Technology and Metallurgy (Bulgaria)
R. Boeva, Univ. of Chemical Technology and Metallurgy (Bulgaria)


Published in SPIE Proceedings Vol. 8770:
17th International School on Quantum Electronics: Laser Physics and Applications
Tanja N. Dreischuh; Albena T. Daskalova, Editor(s)

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