Patent ID: 7217489
Filing Date: 2007-05-15
Classification: B41C,G03F

Abstract:
1. A negative-type planographic printing plate having, disposed on a support, at least a recording layer comprising a radical-polymerizable negative-type image recording material on which an image can be recorded by irradiation with an infrared ray, the radical-polymerizable negative-type image recording material including an infrared ray absorbing agent comprising a cyanine dye in which at least one of substituents on nitrogen atoms at both terminal ends thereof is selected from the group consisting of the following substituents: —C(═X)R —C(═X)R —CH═CR —C≡CR —CR —Ar, wherein X represents O or S; R wherein the radical-polymerizable negative-type image recording material further comprises a radical generating agent and a radical polymerizable compound.