Ink set and ink jet recording method
US7341621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2005 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Jul 29, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/101
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink set is disclosed that comprises a first ink composition containing a first colorant, and a second ink composition containing a second colorant, wherein the first colorant is different from the second colorant; wherein each ink composition, when printed at 100% fill on the same substrate, produces a color having a hue angle, h°n, and a lightness relative to that of the substrate, ΔL*n, according to:h°n=tan−1(b*n/a*n)ΔL*n=L*substrate−L*nwherein n=1 or 2 for the first and second ink compositions, respectively; h°1 and h°2 differ from each other by no more than 15°; and ΔL*1>ΔL*2. An ink jet printing method that employs the ink set is also disclosed, as well as a printed image prepared with the ink set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.