Patent · US Expired

Method for making a lithographic offset plate by the silver salt diffusion transfer process

US5445914A · kind A · utility

3Cited by

7References

7Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Paul Coppens · Turnhout, BE
Augustin Meisters · Gentbrugge, BE
Ludovicus H. Vervloet · Kessel, BE

Key dates

Filing date	Feb 1, 1994
Grant date	Aug 29, 1995
Priority date	—
Expiry date	Feb 1, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG03F7/32
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The present invention provides a method for making an offset printing plate according to the silver salt diffusion transfer process using rinsing water, characterized in that alkali is added to said rinsing water before washing at most 20 m.sup.2 of said exposed and developed imaging element and/or before being in use for more than 24 hours in such an amount that a pH in said washing water between 10.5 and 13 is obtained.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.