Patent ID: 8647811

Claim:
A positive-working lithographic printing plate precursor comprising a substrate, and disposed over this substrate, an outermost imageable layer, and the lithographic printing plate precursor further comprising an infrared radiation absorber, the outermost imageable layer having a dry coating weight of at least 0.7 g/m 2 and up to and including 1.6 g/m 2 , and comprising: a primary polymeric binder, an alkali-soluble secondary vinyl polymer that is not a primary polymeric binder, and a non-polymeric polyhydric phenol, wherein the primary polymeric binder comprises recurring units from either or both of Structures (Ia) and (Ib) so that the primary polymeric binder comprises at least 15 mol % and up to and including 100 mol % of both types of recurring units: wherein R and R′ are independently hydrogen or a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a halo group, R 1 is a substituted or unsubstituted hydroxyaryl group wherein the aryl group has 1 to 3 hydroxyl groups on the ring, and R 2 is a substituted or unsubstituted hydroxyaryl group that is substituted with a cyclic aliphatic or aromatic imide group, and further that the Structure (Ia) recurring units are present in an amount of at least 10 mol % and up to and including 50 mol % and the Structure (Ib) recurring units are present in an amount of at least 15 mol % and up to and including 70 mol %, based on total recurring units.