A Novel Lithographic Surface for Use with Thermal Ablative CtP

A microscopic investigation of a novel lithographic surface, based upon a polymer-ceramic composite, yields insights into the behavior of a new CtP product from Presstek --- the Anthema plate. High magnification scanning electron microscope photographs reveal the intricate micro-features that result in a thermal ablative lithographic plate, with a wide press latitude, that requires no gumming step after a simple water wash to remove the ablative debris. Although coated upon a standard anodized aluminum base, this plate uses the surface chemistry of the unique polymer-ceramic composite layer as the actual hydrophilic surface. This layer is composed of a cross-linked hydrophilic polymer embedded with hydrophilic ceramic nodules, which are formed in situ during manufacturing. This poly-ceramic layer allows for rapid roll-up with standard fountain solutions, and run lengths in excess of 100,000 impressions. The correlation between plate morphology and performance is described.