Uncoated Paper for Continuous Ink-Jet Printers
Abstract:This article discusses images printed with a high speed continuous ink-jet printer on uncoated paper using dye-based inks. For such images print quality and waterfastness depend highly on paper additives. Optimizing paper properties requires tradeoffs. For example, increased print waterfastness leads to a large loss of print optical density. With improved waterfastness also comes more print raggedness. Color-to-color bleed and black print quality generally are opposed to each other. Why the trade-offs occur and ways of overcoming them are discussed.
Total cationic charge dictates waterfastness but limits ink coverage, which contributes to lower optical density. Increased sizing lowers waterfastness because of an inability of the ink to interact with cationic charges in the paper. Increased sizing improves black print quality but sometimes leads to lower optical density because of even less ink coverage. Concurrently, higher sizing often lowers color-to-color print quality by increasing bleed. Using and changing additives that alter the absorption and adsorption of inks adjusts the balances of properties. For example, just reducing surface starch levels significantly increases optical density for a given level of waterfastness.
Document Type: Research Article
Publication date: January 1, 2008
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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