Inkjet color ink set
US6540821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2001 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Sep 15, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Color ink sets for use in printer systems are provided and formulated to provide improved plain paper and special media performance while maintaining good printing characteristics. The inks and ink sets of the present invention exhibit excellent color performance and lightfastness across a range of media, robust K/Y bleed resistance on plain paper at fast print speeds, as well as excellent printability and reliability. A specific dye set for formulating yellow, magenta, and cyan inks comprises a mixture of acid yellow 23 (AY23) and direct yellow 132 (DY132), a mixture of a cyan dye compound having the formula:—(SO3H)2.7CuPc—(SO2NH2)0.5—(SO2NH(C2H4OH)0.8wherein Pc represents a phthalocyanine nucleus and acid blue 9; and a magenta dye compound having formula: wherein Q is a cation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.