Patent ID: 7592128

Claim:
A method of providing a lithographic printing plate comprising: A) imagewise exposing an on-press developable, negative-working imageable element to provide an imaged element with an imaged layer containing both exposed regions and non-exposed regions, B) prior or subsequently to step A, mounting said imageable element onto a lithographic printing press, C) after steps A and B, contacting said imaged layer on-press with water or a fountain solution but not a lithographic printing ink for sufficient time to swell said non-exposed regions of said imaged layer but leaving said non-exposed regions of said imaged layer substantially intact on said substrate, D) contacting said imaged layer with swollen non-exposed regions simultaneously wit water or fountain solution and a lithographic printing ink to substantially remove said non-exposed regions only, and E) simultaneously with or subsequently to step D, using said imaged element to print an image on a receiver material, said on-press developable negative-working imageable element comprising an infrared radiation imageable layer on a substrate, said imageable layer comprising: a free radically polymerizable component, a free radical initiator composition, an infrared radiation absorbing compound, and a polymer binder, wherein said polymeric binder comprises a polymer backbone comprising recurring units having pendant (alkylene glycol) side chains and is at least in part, in particulate form, said imageable layer being completely removable prior to irradiation only when contacted, sequentially or simultaneously, with either water or a fountain solution and a lithographic printing ink.