Studying Ink Penetration with Microscopic and Spectroscopic Techniques
Abstract:Distribution of ink jet ink in paper substrates and the consequences of ink penetration for printing color reproduction have been studied by combining microscopic image processing with spectroscopic analysis. The study focused on the effects of the composition of uncoated paper, for five laboratory papers plus two commercial products, all consisting of similar pulps but with different combinations of additives. In particular, it was observed that hydrophobizing internal size agents significantly reduced ink penetration, while their effect on paper optical properties was negligible. This observation thus made it possible to study experimentally the pure effects of ink penetration. Pairwise comparisons of prints on such laboratory papers with identical optical properties revealed remarkable impacts of ink penetration on optical density, causing color saturation reduction and color shift. These experimental observations confirmed the theoretical predictions.
Document Type: Research Article
Affiliations: 1: Department of Chemical Engineering, Karlstad University, SE-651 88 Karlstad, Sweden 2: Institute for Surface Chemistry, SE-114 86 Stockholm, Sweden 3: Digital Printing Center (DPC), Mid Sweden University, SE-89118 Örnsköldsvik, Sweden 4: Stora Enso Research Center, SE-791 80 Falun, Sweden 5: Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
Publication date: July 1, 2006
The Journal of Imaging Science and Technology (JIST) is dedicated to the advancement of imaging science knowledge, the practical applications of such knowledge, and how imaging science relates to other fields of study. The pages of this journal are open to reports of new theoretical or experimental results, and to comprehensive reviews. Only original manuscripts that have not been previously published, nor currently submitted for publication elsewhere, should be submitted.
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