Coated paper for printing

A coated paper with a kaolin-rich outermost coating layer and fluorescent whitening agent enhances gloss and whiteness, addressing the issues of visibility and color reproduction in printed images, particularly skin tones.

JP7888480B2Active Publication Date: 2026-07-13MITSUBISHI PAPER MILLS LTD
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Patent Information

Application Number
JP2023022959
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-02-16
Publication Date
2026-07-13
Estimated Expiration
2043-02-16

AI Technical Summary

Technical Problem

Coated papers with high gloss have poor visibility of fine details in printed images and text, while using cost-effective inorganic pigments like kaolin result in inferior whiteness and color reproduction, particularly affecting skin tone reproduction in human images.

Method used

A coated paper composition with a paper substrate containing a fluorescent whitening agent and an outermost coating layer comprising at least 67% kaolin by mass, along with a binder and a fluorescent whitening agent, achieving a fluorescence intensity of 6.0 or higher, and a total coating amount of 3-9 g/m² as dry solids.

Benefits of technology

The paper achieves moderate gloss in the printed image area compared to the blank area, excellent whiteness, and improved color reproduction, especially in skin tone representation.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a coated printing paper having a suitable glossiness of a printed image part with respect to a blank part, and an excellent whiteness of the blank part and an excellent color tone reproduction property represented by skin color of a human image.SOLUTION: There is provided a coated printing paper, comprising: a paper base material; and one, two or more coating layers on at least one side of the paper base material, wherein on the one side thereof, a total coating amount of the coating layer is 3 g / m2 or more and 9 g / m2 or less in terms of a dry solid, the paper base material contains a fluorescent whitening agent, an outermost coating layer located on an outermost side of the paper base material contains an inorganic pigment, a binder and a fluorescent whitening agent, at least one kind of the inorganic pigments contains kaolin, in the outermost coating layer, a content of the kaolin is 67 mass% or more relative to the inorganic pigment, a fluorescence intensity of the paper base material is 6.0 or more, and a fluorescence intensity measured on a surface having the outermost coating layer is 6.0 or more.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Newsprint paper for cold set type offset printing

    JP2006307370A

  • Coated paper for printing

    JP2009161888A

  • Method for producing double-sided coated paper for printing

    JP2009235617A

  • Coated paper for printing

    JP2014141754A

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    JP2014152430A