Patent ID: 6983694
Filing Date: 2006-01-10
Classification: B41C,B41N

Abstract:
1. A negative-working lithographic priming plate precursor comprising a grained and anodized aluminum support having a hydrophilic surface; a heat-sensitive coating provided on the hydrophilic surface, said coating consisting essentially of hydrophobic thermoplastic polymer particles which are capable of forming a hydrophobic phase in said coating by heat-induced coalescence of said polymer particles and an anionic infrared light absorbing cyanine dye; and optionally one or more of binders, surfactants, colorants, development inhibitors or accelerators, and light-to-heat converting compounds; wherein the hydrophilic surfacc has a surface roughness, expressed as arithmetical mean center-line rougbness Ra, which is less than 0.45 μm, and the aluminum support comprises more than 2.5 g/m