Patent ID: 6977132
Filing Date: 2005-12-20
Classification: B41C,B41M,B41N

Abstract:
1. A planographic printing plate precursor comprising: a support comprising a substrate and a hydrophilic layer disposed on a surface of the substrate, the hydrophilic layer including hydrophilic polymer and a crosslinked structure formed by hydrolysis or condensation polymerization of an alkoxide compound including an element selected from the group consisting of Si, Ti, Zr and Al; and a positive working recording layer disposed on the support and including a material for absorbing light and generating heat, and a polymer compound, which is insoluble in water and soluble in alkali; wherein a solubility of the positive working recording layer in an alkaline aqueous solution is increased by exposure to light, and the hydrophilic polymer is represented by a following general formula (1): wherein the general formula (1) represents a polymer compound including a silane coupling group represented by a structural unit (iii) at an end of polymer units represented by structural units (i) and (ii), wherein each of R