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US 7,682,011 B2Granted
Recording ink, ink cartridge, ink record, inkjet recording apparatus and inkjet recording process
AssigneeRicoh Company, Ltd.
InventorsMichihiko Namba, Hisashi Habashi, Mariko Kojima, Tomohiro Inoue, Akiko Bannai, Akihiko Gotoh, Kiyofumi Nagai
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Abstract
The object of the present invention is to provide a recording ink which is excellent in color developing properties, has a high delivery stability, can improve remarkably color saturation and can form a high-quality image, when the ink is used for printing a plain paper, further an ink cartridge, an ink record, an inkjet recording apparatus and an inkjet recording process, wherein the recording ink having water, a wetting agent, a surfactant, and a colorant.
Claims15
A recording ink comprising:
- water,
- a wetting agent,
- a surfactant, and a colorant
- wherein
- the colorant is an aqueous dispersion of polymer fine particles comprising a colorant,
- the wetting agent comprises 3-methyl-1,3-butanediol,
- the surfactant is at least one of the group of compounds selected from the group consisting of compounds represented by the formula (I):
- CF3CF2(CF2CF2)m—CH2CH2O(CH2CH2O)nH Formula (I)
- wherein “m” is an integer of 0 to 10 and “n” is an integer of 1 to 40, and
- the recording ink is at least one selected from the group consisting of a cyan ink, a magenta ink, and a yellow ink.
7 more elements
Dependencies are inferred from the claim text.