| 摘要 |
High speed violet or ultraviolet laser sensitive lithographic printing plate comprising on a substrate a specific photosensitive composition is described. The photosensitive layer comprises a multifunctional (meth)acrylate monomer, a hexaarylbiimidazole compound, and a sensitizing dye. Combination of both multifunctional urethane (meth)acrylate monomer and multifunctional non-urethane (meth)acrylate monomer can be advantageously used. The plate is imagewise exposed with a violet or ultraviolet laser at a dosage of less than 1000 μJ/cm2, and then developed either off press or on press.
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