Dye discharge inkjet ink compositions
US9725848B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2013 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Nov 14, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/0023
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dye discharge composition exhibiting extended shelf life and/or pot life and high suitability for inkjet printing on dyed substrates, is disclosed. The composition comprises a reducing agent such as, for example, a sulfur-based reducing agent, and a chelating agent, such as a sodium salt of a polyamino carboxylic acid chelating agent. Use of the dye discharge composition in combination with a translucent colored composition and an optional opaque underbase composition, for forming an image on a dyed substrate is also disclosed. Processes for inkjet printing of an image on a dyed surface using the dye discharge composition, kits for use in such processes or an ink formulation containing same are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.