Lightfade-stable ink formulations based on blends of rhodamines and metal-containing dyes
US6808555B2 · kind B2 · utility
12Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2002 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Feb 26, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides inkjet ink compositions having high chroma and lightfastness characteristics as well as methods for the making and use thereof In one aspect of the present invention, the ink composition may include a mixture of an effective amount of a rhodamine dye and an effective amount of a metalized magenta dye in an ink vehicle. In an additional aspect of the invention, and image formed using the ink composition of the present invention may achieve a chroma of at least about 57 and a lightfastness of at least about 5 years.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.