Process for reducing sludge in diffusion transfer printing plates

Abstract

A method of making a lithographic printing plate that comprises the steps of: (a) imagewise exposing a unitary, light sensitive material which consists of a support, at least one negative working light sensitive silver halide layer and a surface physical development nucleating layer, said construction containing a developing agent and electron transfer agent in one or more layers; (b) processing said printing plate in a diffusion transfer alkaline activator solution containing at least one aminocarboxylic acid complexing agent.

Dependencies are inferred from the claim text.