Aqueous ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus and image forming method
US7267717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2006 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Feb 17, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An object of the present invention is to provide an aqueous ink which can form a more excellent image in bleeding resistance, character quality and print density than the image formed by using an aqueous ink containing a conventional self-dispersion pigment and a salt. The aqueous ink includes a self-dispersion pigment and a salt, in which the self-dispersion pigment is a pigment containing a pigment particle having a —R—(COOM1)n group bonded to a surface of the pigment particle, wherein R represents an alkylene group or an aromatic ring; M1 represents a hydrogen atom, an alkali metal, an ammonium or an organic ammonium; and n is an integer of 2 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.