Postal blue ink with improved durability
US7972425B2 · kind B2 · utility
1Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2008 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Dec 29, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water-based ink for inkjet recording exhibits a blue color defined as L*<45, 25<C*<28, 255<h<278, and comprises a mixture of dyes and pigments, specifically including C.I. Pigment Blue 60 and C.I. Acid Blue 90, with water and a water-soluble organic solvent. The blue ink provide an image which has good water resistance and high optical density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.