Patent ID: 8939080
Filing Date: 2015-01-27
Classification: B41C,B41N,G03F

Abstract:
1. A method of providing a lithographic printing plate comprising: A) imagewise exposing a positive-working lithographic printing plate precursor that has a substrate and an outermost imageable layer that comprises a polymer binder comprising recurring units represented by Structure (Ib) below: wherein the recurring units of Structure (Ib) are present in an amount of at least 25 and up to and including 60 mol %, all based on total recurring units in the polymer binder, and R 2 is a substituted or unsubstituted hydroxyaryl group in which the hydroxyl group is ortho to the ester linkage, to form exposed and non-exposed regions in the imageable layer, and B) developing the resulting imaged lithographic printing plate precursor to remove the exposed regions of the imageable layer, the development being carried out using a silicate-free developer composition having a pH of at least 12 and comprising at least 0.001 gram-atom/kg of a metal cation M