Ink composition and image formation method
US8371687B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Apr 27, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides an ink composition containing at least: a water-soluble organic solvent; a pigment; water; and a nonionic polymer thickener. The content of the water-soluble organic solvent is from 5 weight % to 30 weight % relative to the total amount of the ink composition. The ratio of Vhigh/Vlow, in which Vhigh represents 25° C. viscosity (mPa·s) measured at a shear rate of 1.5×105 (s−1) and Vlow represents 25° C. viscosity (mPa·s) measured at a shear rate of 3.0×103 (s−1), is from 0.70 to 0.95. The invention further provides an image formation method including at least ejecting the ink composition onto an image recording medium using an image formation apparatus to form an image on the image recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.