ON-PRESS DEVELOPABLE PRINTING PLATE WITH AMPHOTERIC HYDROGENBOND FORMING DEVELOPABILITY STABILIZER

The present invention discloses a lithographic printing plate developable on a lithographic printing press equipped with means for delivering lithographic ink and aqueous fountain solutions to the printing plate, the lithographic printing plate having in order (a) a printing plate substrate; and (b) a photoresist photohardenable upon imagewise exposu re to actinic radiation, the photoresist comprising (i) a macromolecular organic binder, (ii) a photopolymerizable ethylenically unsaturated monomer having at least one terminal ethylenic group capable of forming a high polymer by chain-propagated polymerization, (iii) a polymerization initiator activable by actinic radiation, and (iv) an amphoteric hydrogen bond-forming developability stabilizer, the hydrogen bond-forming developability stabilizer being non-volatile miscible in the photoresist and soluble in said lithographic ink and fountai n solutions; the amphoteric hydrogen bond-forming developability stabilizer possessing a strong hydrogen bond-forming functional group with t he remainder of the molecule manifesting hydrophilicity.