Patent ID: 6500599
Filing Date: 2002-12-31
Classification: B41C

Abstract:
A lithographic printing plate precursor comprising a support having thereon an ink-receptive light-heat conversion layer containing a compound converting laser light to heat and a hardened hydrophilic layer in this order, wherein a part of said light-heat conversion layer remains at a laser light-irradiated area of said lithographic printing plate precursor and wherein said light-heat conversion layer has a cross-linked structure which is cross-linked by at least one cross-linking agent selected from the group consisting of multifunctional isocyanate compounds, multifunctional epoxy compounds, multifunctional amine compounds, polyol compounds, multifunctional carboxyl compounds, aldehyde compounds, multifunctional (meth)acrylate compounds, multifunctional vinyl compounds, multifunctional merocapto compounds, multifunctional metal salt compounds, polyalkoxysilane compounds, polyalkoxytitanium compounds, polyalkoxyaluminum compounds, polymethylol compounds and polyalkoxymethyl compounds, is hardened and has a dry weight of 0.5 g/ml to 3 g/m2, and wherein said hydrophilic layer is a layer receiving and retaining a fountain solution in printing using the fountain solution and ink, and functions as a non-image area.