Patent ID: 9063423
Filing Date: 2015-06-23
Classification: B41C,G03F

Abstract:
1. A negative-working lithographic printing plate precursor that comprises: a substrate, a negative-working imageable layer disposed over the substrate, the negative-working imageable layer comprising a free radically polymerizable component, an initiator composition that is capable of generating free radicals upon exposure to imaging radiation, a radiation absorbing compound, and a polymeric binder, and an outermost water-soluble overcoat layer that is disposed directly on the negative-working imageable layer, the outermost water-soluble overcoat layer having a dry thickness (t), in μm, that is defined by the following equation (I): wherein w is the dry coverage of the outermost water-soluble overcoat layer in g/m the outermost water-soluble overcoat layer comprising: (1) one or more film-forming water-soluble polymeric binders, (2) organic wax particles having an average largest dimension D(wax) that is at least 0.08 μm and up to and including 0.8 μm, and meets the following Equation (III): and (3) non-wax matte particles having an average largest dimension D(matte) that is defined by the following equation (II):