Gel-forming inks for use in the alleviation of bleed
US5476540A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Oct 5, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M3/001
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for controlling color bleed between adjacent multi-color ink regions on a print medium is disclosed. Color bleed involves the migration of color agents between adjacent zones in a multicolored printed image on a print medium. A first composition containing a gel-forming species and a color agent is brought into contact on a region of the print medium with a second composition having a color agent and a gel-initiating species or chemical conditions which bring about gelation. In alternative embodiments, the print medium may be pretreated with either a gel-initiating species or a gel-forming species (with no colorant), followed by treatment with a gel-forming species or gel-initiating species (with colorant), respectively. The formation of the gel upon the print medium impedes the movement of the color agent or agents and thus reduces the color bleed between adjacent zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.