Black ink composition, ink set, and image forming method
US9045656B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2012 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Apr 20, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A black ink composition is provided which suppresses change in hue and can form an image with superior blocking resistance and scratch resistance. The black ink composition for ink jet recording includes a carbon black pigment; at least any one type of colorant pigment which is selected from a magenta pigment and a cyan pigment; a water-soluble polymerizable compound; a polymerization initiator; and water, wherein the average primary particle diameter of the carbon black pigment is 20 nm or more and less than 35 nm, the content ratio of the carbon black pigment with regard to the total mass of all of the pigments is 70 mass % or less, and the total mass of all of the pigments with regard to the total mass of the black ink composition is 4 mass % or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.