A method for making a lithographic offset plate by the silver salt diffusion transfer process.

摘要

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<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.