Ink composition, ink cartridge, inkjet recording method, and recorded matter
US7279034B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2005 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Dec 31, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/328
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
It is an object of the present invention to provide an ink composition with which the indoor storage stability (gas resistance) of an image produced with an ink composition featuring a phthalocyanine-based cyan dye can be increased without causing any additive precipitation or bronzing. The present invention provides an ink composition containing at least water, a phthalocyanine-based cyan dye, and a lithium salt of an aromatic compound having a sulfo group and expressed by General Formulas 1 and/or 2 in the claims. The present invention also provides an ink composition containing at least water, a phthalocyanine-based cyan dye, and a lithium salt of an aromatic compound having a sulfo group and expressed by General Formulas 5 and/or 6 in the claims. The present invention further provides an ink composition containing at least water, a phthalocyanine-based cyan dye, and a lithium salt of an aromatic compound having a sulfo group and expressed by General Formulas 1 and/or 2 in the claims or a lithium salt of an aromatic compound having a sulfo group and expressed by General Formulas 5 and/or 6 in the claims, wherein the phthalocyanine-based cyan dye is expressed by Formula 3 in the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.