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Aqueous ink, ink set, image forming method and image forming apparatus

A water-based ink, image technology, applied in chemical instruments and methods, copying/marking methods, inks, etc., to achieve the effect of suppressing bleeding or color unevenness, high image quality

Inactive Publication Date: 2008-11-12
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, when various plain papers are used as recording media, the inventions described in Japanese Patent Application Laid-Open Nos. 2001-150793 and 2001-152059 are insufficient as a method of forming high-level high-quality images required in recent years

Method used

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  • Aqueous ink, ink set, image forming method and image forming apparatus
  • Aqueous ink, ink set, image forming method and image forming apparatus
  • Aqueous ink, ink set, image forming method and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0150] Hereinafter, the present invention will be described more specifically by the following Examples, Comparative Examples and Reference Examples. However, the present invention is not limited to these Examples unless exceeding the gist of the present invention. In addition, "%" used below is based on mass unless otherwise stated.

[0151]

[0152] To a solution of 5 g of concentrated hydrochloric acid dissolved in 5.5 g of water, 1.5 g of 4-amino-1,2-phthalic acid was added under cooling at 5°C. Then place the container containing this solution in an ice bath, stir the solution so that the solution is kept below 10°C, and then add a solution obtained by dissolving 1.8g of sodium nitrite in 9g of water at 5°C . After continuing to stir the solution for 15 minutes, 6 g of carbon black having a specific surface area of ​​220 m2 / g and a DBP oil absorption value of 105 mL / 100 g were added while stirring. The resulting mixture was then stirred for a further 15 minutes. Aft...

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PUM

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Abstract

An aqueous ink used together with a black ink containing a self-dispersion pigment, wherein the aqueous ink contains a reactive component for destabilizing the dispersion state of the self-dispersion pigment, the dynamic surface tension of the aqueous ink at a lifetime of 30 milliseconds is 41 mN / m or more, and the dynamic surface tension of the aqueous ink at a lifetime of 500 milliseconds is from 28 mN / m or more to 38 mN / m or less as determined by a maximum bubble pressure method.

Description

technical field [0001] The present invention relates to an aqueous ink particularly suitable for use in an inkjet recording method, and an ink set, an image forming method, and an image forming apparatus using the aqueous ink. Background technique [0002] The inkjet recording method is widely used in various fields because recording can be performed with low noise, and a high-resolution image can be obtained at high speed by using a recording head having a high-density multi-port. [0003] An ink containing a pigment as a coloring material (pigment ink) capable of obtaining a recorded article having a high image density and excellent fastness has hitherto been used as an ink for the inkjet recording method. As for the pigment ink, a black ink comprising carbon black and a dispersant and a black ink comprising a self-dispersing type pigment capable of dispersing a pigment without using a dispersant have been proposed (see Japanese Patent Application Laid-Open S63-152681, S64...

Claims

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Application Information

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IPC IPC(8): C09D11/00B41J2/01B41M5/00C09C1/48C09C3/06C09C3/08C09D11/322C09D11/324C09D11/326C09D11/38
Inventor 冈村大二宅原浩幸西野勇辉真田干雄森部镰志工藤智
Owner CANON KK
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