| 摘要 |
Lithographic printing plates can be provided by imagewise exposing a negative-working lithographic printing plate precursor comprising an aluminum-containing substrate having thereon an imageable layer, to provide exposed and non-exposed regions in the imageable layer. This imaged element is then processed to remove the non-exposed regions in the imageable layer and to gum the resulting image in a single step without an intermediate rinsing step by using an aqueous alkaline solution having a pH of at least 9. The aqueous alkaline solution includes an organic amine having a boiling point of less than 300° C., a film-forming hydrophilic polymer, and optionally an anionic or nonionic surfactant.
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