Ink set for ink-jet recording, method for producing the same, and the ink-jet printer
US7407537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2005 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Apr 7, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink set for ink-jet recording includes a pigment-based ink containing a negatively chargeable and self-dispersible pigment as a coloring agent and a dye-based ink containing an anionic dye as a coloring agent, and the ink set satisfies the following expression (1):Dci<1.1×Pci+0.0001 (1)wherein “Dci” represents an amount of counter ion (mol/g) of the anionic dye contained in the dye-based ink, and “Pci” represents an amount of counter ion (mol/g) of the self-dispersible pigment contained in the pigment-based ink. The pigment aggregation can be greatly suppressed, and the high quality printing can be stably performed when the ink set for ink-jet recording composed of the pigment-based ink and the dye-based ink is carried on an ink-jet printer provided with a conventional maintenance system that is simple and at low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.