Black ink composition, ink set, and image forming method
US9714356B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2014 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Aug 22, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A black ink composition includes: carbon black and a water-insoluble resin that covers at least a part of the surface of the carbon black; a cyan pigment and a water-insoluble resin that covers at least a part of the surface of the cyan pigment; a magenta pigment and a water-insoluble resin that covers at least a part of the surface of the magenta pigment; water-insoluble resin particle; and water, wherein a content ratio of the carbon black is from 1.0 to 2.0% by mass with respect to the total mass of the composition, and a total amount of pigments is from 1.8 to 3.5% by mass with respect to the total mass of the composition. The black ink composition can be used in an ink set and an image forming method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.