Aqueous ink composition and method of recording using the same
US5704969A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1996 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Apr 16, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B47/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cyan ink comprising a phthalocyanine derivative represented by the following formula (I), excellent in color reproducibility, suitable for use in the ink jet recording method is disclosed. The combination use of this cyan ink comprising the phthalocyanine derivative with yellow and magenta inks, each comprising a specific dye, gives excellent color printing. ##STR1## wherein X represents an ion of a metal selected from Cu, Fe, Co and Ni, R.sup.1 represents H or an alyl group, Z represents --O, --COOH or NR.sup.2 R.sup.3 (where R.sup.2 represents H or an alkyl group, and R.sup.3 represents an alkyl group or phenyl group), n represents an integer of 1 to 15, k and l represent 0 or 1, and m represents an integer of 1 to 4, provided that k, l and m fulfill the inequality 2.ltoreq.k+1+m.ltoreq.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.