Patent ID: 6740465
Filing Date: 2004-05-25
Classification: B41M,G03C,G03F

Abstract:
A photothermally sensitive recording sheet comprising:(a) a transparent first sheet material having first and second surfaces, and having a thickness of less than 8 &mgr;m; (b) disposed on the first surface of the first sheet material, a thermal slip layer; (c) a second sheet material having first and second surfaces; and (d) disposed between the second surface of the first sheet material and the first surface of the second sheet material, a photothermally sensitive imaging layer comprising: (i) a finely divided particulate developer having a melting point or melt flow temperature in excess of 70Â° C., which is reactive in contact with a color dye precursor to form a color, and (ii) heat developable, light sensitive microparticles each comprising a polymeric wall or matrix material and containing, distributed within the microparticle, a photopolymerizable or photocrosslinkable material, a photoinitiator for that material, and a color dye precursor reactive with the developer where the microparticles are photohardenable by exposure to actinic radiation and, if not photohardened, are sufficiently permeable to permit contact of the color dye precursor with the developer when heated above the melting point or flow temperature of the developer and, if photohardened, are sufficiently impermeable to prevent contact of the color dye precursor with the developer even when heated above the melting point or flow temperature of the developer.