Electrostatic printing
US9428655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2012 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Feb 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1355
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Described herein is a method for electrostatic printing including: (i) providing an ink composition having: a hydrocarbon carrier liquid and particles includes a resin and a colorant, and wherein the ink composition contains less than 0.3 mg of charge director per g of solids in the ink composition; (ii) adding a charge director to the ink composition, such that the total amount of charge director in the ink composition is at least 0.6 mg per g of solids in the ink composition, and, (iii) within a predetermined time of adding the charge director, printing the ink onto a print medium in an electrostatic printing process, wherein the predetermined time is 90 minutes or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.