Thermal ablation transfer lithographic printing plates.

摘要

Waterless and wet lithographic plates precursors are prepared as composites comprising presensitized (PS) lithographic plate precursors supporting radiation-ablative coatings containing an ablation sensitizer and an imaging amount of a non-ablative ultra-violet (UV) absorber. Digitized IR laser image inscription within the ablative coatings initiates ablation-driven transfer of the UV absorber to the PS plate. UV exposure of the plate followed by conventional development provides lithographic plates that exhibit high impression life suitable for high volume printing runs.