[EN] POLYMERIC DYES, OVERCOAT COMPOSITIONS AND THERMAL LITHOGRAPHIC PRINTING PLATES<br/>[FR] COLORANTS POLYMÈRES, COMPOSITIONS DE COUCHES DE RECOUVREMENT ET PLAQUES D'IMPRESSION LITHOGRAPHIQUE THERMIQUE
申请人:AMERICAN DYE SOURCE INC
公开号:WO2009015467A1
公开(公告)日:2009-02-05
A thermal lithographic printing plate overcoat composition comprising (a) a water- soluble polymeric dye having an absorption band between about 300 and about 600 nm; and (b) micro-particles or nano-particles is provided. A negative-working thermal lithographic printing plate comprising (a) a hydrophilic substrate; (b) a near infrared imaging layer disposed on the hydrophilic substrate; and (c) an overcoat layer disposed on the imaging layer, said overcoat layer comprising a water-soluble polymeric dye having an absorption band between about 300 and about 600 nm; and micro-particles or nano-particles is also provided. Finally, a water-soluble polymeric dye having an absorption band between about 300 and about 600 nm is provided.