Method for making a lithographic aluminium offset printing plate by the silver salt diffusion transfer process
US5196290A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1992 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | May 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/425
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a method for making a lithographic aluminium offset printing plate comprising the steps of: PA0 information-wise exposing an imaging element comprising on an aluminium support a layer of physical development nuclei and a silver halide emulsion layer PA0 developing said information-wise exposed imaging element in the presence of a silver halide solvent to obtain a silver image in said layer of physical development nuclei and PA0 removing all layers on top of said silver image to expose said silver image by means of washing with rinsing water characterized in that said rinsing water has a pH of 4 to 8 and is bufferred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.