Patent ID: 6805052
Filing Date: 2004-10-19
Classification: B41C,B41M

Abstract:
Method of printing on a press, providing a printing run length of said press to be increased with a factor of at least 5 versus a reference run length, making use therefore of a lithographic printing plate, said method comprising the steps of:image-wise exposing to infrared light a heat sensitive imaging element, said element being optionally present on the press before starting said image-wise exposing step to infrared light, wherein said element comprises, on a lithographic base with a hydrophilic surface thereupon, an image-forming layer including hydrophobic thermoplastic polymer particles and a hydrophilic polymer binder, and, optionally, an infrared absorbing compound, wherein said hydrophobic polymer particles contain more than 0.1 wt % of nitrogen and have an average particle size diameter in the range from 0.015 to 0.15 &mgr;m, and wherein said reference run length utilizes reference particles containing no or less than 0.1 wt % of nitrogen, developing the image-wise exposed imaging element by mounting it on a print cylinder of a printing press and applying an aqueous dampening liquid and ink to said imaging element while rotating said print cylinder, starting printing up to said increased run length.