Ink, ink jet recording method, recording unit, ink cartridge, and ink jet recording apparatus

a technology of ink jet and recording method, which is applied in the direction of inks, instruments, printing, etc., can solve the problems of reducing the color efficiency per unit mass, and achieve the effect of satisfying color developability and high humidity resistan

Inactive Publication Date: 2006-05-18
CANON KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0031] According to the present invention, there can be provided: an ink jet yellow ink which satisfies color developability requested for ink jet ink and has high humidity resistance even whe

Problems solved by technology

Meanwhile, the coloring material having a large molecular weight has a structure in which a part

Method used

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  • Ink, ink jet recording method, recording unit, ink cartridge, and ink jet recording apparatus
  • Ink, ink jet recording method, recording unit, ink cartridge, and ink jet recording apparatus
  • Ink, ink jet recording method, recording unit, ink cartridge, and ink jet recording apparatus

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[0150] Hereinafter, the present invention will be described by way of examples and comparative examples. However, the present invention is not limited to the following examples without departing from the gist of the present invention. Unless otherwise stated, the term “part” of each ink component in examples and comparative examples represents “part by mass”.

[0151]

[0152] Diazotized 4-nitro-4′-aminostilbene-2,2-disulfonic acid and 3-aminonapthalene-1-sulfonic acid were subjected to coupling. The resultant was turned into a triazole, and a nitro group of the triazole was reduced to an amino group by means of a conventionally known method to produce aminostilbene-triazole. Aminostilbene-triazole was dissolved into water, and sodium nitrite and hydrochloric acid were added dropwise to the solution to perform diazotization. The resultant was added dropwise to an aqueous solution of a compound represented by Compound (1) below, and the whole was subjected to coupling, followed by dialysi...

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Abstract

An ink jet ink contains at least a coloring material and a specific water-soluble organic solvent and has both excellent color developability and excellent humidity resistance. The coloring material exhibits a small (9 or less) color difference ΔE value which is determined by a method including a series of specific steps and is represented as the square root of (L1-L2)2+(a1-a2)2+(b1-b2)2. The specific water-soluble organic solvent has an evaporation rate X smaller than that of water and a moisture absorptivity Y, the values of X and Y satisfying the relation of Y≦2.8X+10. The content of the specific water-soluble organic solvent is 50 mass % or more of the total amount of water-soluble organic solvents contained in the ink.

Description

[0001] This application is a continuation of International Application No. PCT / JP2005 / 012701, filed Jul. 4, 2005, which claims the benefit of Japanese Patent Application Nos. 2004-196446 filed Jul. 2, 2004, 2004-196449 filed Jul. 2, 2004 and 2005-193806 filed Jul. 1, 2005.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an ink jet ink having good color developability, good humidity resistance, and high reliability as ink jet ink; an ink jet recording method; a recording unit; an ink cartridge; and an ink jet recording apparatus. [0004] 2. Related Background Art [0005] An ink jet recording method is a recording method involving applying a small ink droplet to any one of recording media such as plain paper and glossy media to form an image, and has become rapidly widespread owing to a reduction in its cost and an improvement in its recording rate. With the rapid spread of a digital camera in addition to an improvement in quality of a...

Claims

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Application Information

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IPC IPC(8): G01D11/00B41J2/01B41M5/00C09B56/04C09B67/44C09D11/00C09D11/328
CPCC09D11/32C09D11/40C09D11/037B41J2/01B41M5/00
Inventor YOSHIZAWA, JUNSATO, SHIN-ICHINAKAMURA, KUNIHIKOYAMASHITA, TOMOHIRO
Owner CANON KK
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