Ultra-Thin Layers for use with Direct Imaging Thermal Ablative Plates

A microscopic investigation of a novel lithographic surface, based upon ultrathin layers of polymers and ceramics coated on a polymer-ceramic composite, yields insights into the behavior of a new DITM product from Presstek. High magnification scanning electron microscope photographs reveal the intricate micro-features that result in a thermal ablative lithographic plate that can be imaged directly on-press without the need to process and requires no gumming step. By simplifying the imaging and registration processes, this structure provides a more reliable printing process. Although coated upon a standard polyester base, this plate uses the surface chemistry of these unique polymer and ceramic layers as the actual printing surfaces. These ultra-thin layers allow for extremely high resolution and long run capability over 100,000 impressions. These novel lithographic surfaces are formed using advanced vacuum coating techniques. The link of plate morphology and more repeatable press performance is described.