Ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus
A coloring material, a general-form technology, used in the fields of ink, inkjet recording, ink cartridges, recording units and inkjet recording equipment, can solve the problems of difficult high optical density and near-neutral color tone, and achieve excellent initial color tone. Effect
Active Publication Date: 2011-04-13
CANON KK
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Problems solved by technology
On the other hand, with azo dyes generally used as water-soluble dyes, it is difficult to obtain a high optical density and an approximately neutral hue with one coloring material
Method used
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[0323] Hereinafter, the present invention will be described in more detail by the following Examples and Comparative Examples. However, the present invention is not limited to these examples without departing from the gist of the present invention. Incidentally, the parts of the ink components in Examples and Comparative Examples represent "parts by mass" unless otherwise specified.
[0324]
[0325] Exemplary compounds were prepared according to the following procedure. For each of the exemplary compounds thus obtained, water was used as a solvent to measure the maximum absorption wavelength (λ max ).
[0326] Spectrophotometer: Automatic recording spectrophotometer (trade name: U-3300, manufactured by Hitachi Ltd.)
[0327] · Measuring pool: 1cm quartz pool
[0328] Sampling interval: 0.1nm
[0329] Scanning rate: 30nm / min
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Abstract
The invention provides ink, an ink jet recording method, an ink cartridge, a recording unit and an ink jet recording apparatus. Provided is a black ink which provides an image with excellent color tone, little color tone change after a light fastness test and excellent balance of color tone change and light fastness. The black ink further provides an image with a gradation property having a colortone close to a neutral color tone even before and after a light fastness test. The ink contains at least a compound represented by the general formula (I) as a first coloring material, a compound represented by the general formula (II) as a second coloring material and a compound represented by the general formula (III) as a third coloring material.
Description
technical field [0001] The present invention relates to an ink, an inkjet recording method, an ink cartridge, a recording unit, and an inkjet recording apparatus. Background technique [0002] The inkjet recording method, which is a recording method in which minute ink droplets are applied to a recording medium such as plain paper or glossy media to form an image, is rapidly gaining popularity due to the low cost of the equipment itself and improvement in recording speed. In addition to advances in forming high-quality images using the inkjet recording method, with the rapid spread of digital cameras, the inkjet recording method has become a conventional image output method comparable to silver halide photographs. [0003] One problem involved in the inkjet recording method is that the resulting recorded product has poor image storage stability. In general, recorded articles obtained by the ink jet recording method have a problem of poor image storage stability as compared ...
Claims
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IPC IPC(8): C09D11/02B41J2/175B41J2/01B41M5/00C09D11/00C09D11/328
Inventor 真船久实子山下知洋吉泽纯
Owner CANON KK