Water developable diazo based lithographic printing plate comprising an intermediate layer having a polysaccharide
US5403694A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Dec 10, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides an imaging element comprising on a support in the order given, a hydrophilic layer containing a hydrophilic (co)polymer or (co)polymer mixture and being hardened with a hydrolyzed tetraalkyl orthosilicate crosslinking agent and a light sensitive layer containing a diazo resin or a diazonium salt characterized in that an intermediate hydrophilic layer containing an organic compound having one or more cationic groups is provided between said hydrophilic layer and said light-sensitive layer. There is further provided a method for making such an imaging element and a method for making a lithographic printing plate therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.