Water-based ink composition

The aqueous ink composition addresses low wettability and plate doubling issues by controlling ion concentration and pH, improving stability and water resistance, thus enhancing printing quality and productivity in gravure printing.

JP7838306B2Active Publication Date: 2026-04-01TOYO INK MFG CO LTD +1
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-02-24
Publication Date
2026-04-01
Patent Text Reader

Abstract

To provide an aqueous ink composition which is excellent in stability with time, water resistance, and flexographic plate washing property, and prevents plate fog of a printed matter.SOLUTION: An aqueous ink composition contains an aqueous resin having an acid group, a pigment and water, wherein total concentration of magnesium ions and calcium ions in the ink composition is 95 mg / L or less. In the aqueous ink composition, pH is 7.5-10.5. In the aqueous ink composition, the aqueous resin having an acid group is an aqueous urethane resin and / or an aqueous acrylic resin.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Method for gravure printing using aqueous gravure ink and printed matter printed thereby

    JP2002178622A

  • Ink for recording and method of its preparation

    JP2002179961A

  • Aqueous pigment dispersion and ink composition

    JP2002294133A

  • Polyurethane resin composition, aqueous printing ink composition comprising the same, coated plastic sheet using the same and laminated product thereof

    JP2005272587A

  • Aqueous polyurethane resin and application thereof

    JP2013249401A