Lithographic process involving on press development
US7442485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2004 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Jun 30, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41C2210/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A lithographic printing process comprises the steps of: imagewise exposing to infrared light a presensitized lithographic plate which comprises a hydrophilic support and an image-forming layer containing an infrared absorbing agent, a polymerization initiator and a binder polymer to polymerize the polymerizable compound within the exposed area; removing the image-forming layer within the unexposed area while mounting the lithographic plate on a cylinder of a printing press; and then printing with the lithographic plate while mounting the lithographic plate on the cylinder of the printing press. The polymerization initiator is a salt of an anion with a sulfonium ion. According to the present invention, a specific anion or a specific sulfonium ion is used in the polymerization initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.