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Ink, ink cartridge and ink jet recording method

A technology of inkjet and coloring materials, applied in ink, household utensils, applications, etc., can solve the problems of coloring materials such as easy aggregation, resistance to fixation, and reduction, and achieve excellent ozone resistance and the effect of suppressing color change

Active Publication Date: 2014-03-26
CANON KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Furthermore, in an ink containing a coloring material designed in an easily associative structure in order to improve the ozone resistance of an image, a liquid component such as water evaporates from the ejection port of the recording head to finally condense the ink; easy aggregation of the coloring material eventually occurs and such special problems of reduced fixation resistance

Method used

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

Examples

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Embodiment

[0104] Hereinafter, the present invention will be described in more detail by the following Examples and Comparative Examples. However, the present invention is not limited by the following examples unless departing from the gist of the present invention. In addition, all indications of "parts" and "%" with respect to the amounts of components described below are based on mass unless otherwise specified.

[0105]

[0106] Black coloring material 1

[0107] A mixture of lithium salt and sodium salt (80%:20%) of the compound represented by the following formula (black coloring material 1) in free acid form was synthesized by referring to the description of International Publication WO2012 / 014954.

[0108]

[0109] Black coloring material 2

[0110] A mixture of lithium salt and sodium salt (80%:20%) of the compound represented by the following formula (black coloring material 2) in free acid form was synthesized by referring to the description of International Publica...

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Abstract

The invention relates to an ink, an ink cartridge and an ink jet recording method. The ink contains a first coloring material and a second coloring material, the sum total of these contents being 6.0% by mass or less. The first coloring material is a black coloring material exhibiting a difference Delta Lambda max1 of 20.0 or more between a maximum absorption wavelength in a 20.0% by mass aqueous solution of 1,2-hexanediol and a maximum absorption wavelength in water, the second coloring material is a specific coloring material exhibiting a difference Delta Lambda max2 of 12.0 or less between a maximum absorption wavelength in a 20.0% by mass aqueous solution of 1,2-hexanediol and a maximum absorption wavelength in water, and the sum of the Delta Lambda max1 and the Delta Lambda max2 is 35.0 or less.

Description

technical field [0001] The present invention relates to an ink, an ink cartridge and an inkjet recording method. Background technique [0002] The inkjet recording method, which is a recording method in which minute droplets of ink are applied to a recording medium such as plain paper to form an image, is rapidly gaining popularity due to cheapness of the apparatus itself and improvement in recording speed. In general, a recorded matter obtained by an inkjet recording method has low image fastness compared with a silver salt photograph. In particular, when recorded matter is exposed to light, moisture, heat, or ambient gas such as ozone gas present in the atmosphere for a long period of time, there is a problem that the coloring material of the recorded matter deteriorates to easily cause color tone change or image fading. [0003] Fading of an image recorded using an ink having a black hue involves a change in tone due to deterioration of a coloring material in many cases....

Claims

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Application Information

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IPC IPC(8): C09D11/328C09D11/36
CPCC09D11/328
Inventor 池上正幸小笠原干史岩田哲斋藤贵史辻村政史小岛洋二郎
Owner CANON KK
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