Abstract: A positive lithographic printing plate exposed by an imagesetter and suitable for mounting on a press cylinder comprising a photo-lithographic DTR material having a DTR processed RIP image to be printed lithographically and a DTR processed ink repelling region for mounting the printing plate on the press cylinder. The RIP image is exposed according to exposure commands which are sent to the imagesetter by the RIP and the DTR processed ink repelling region is exposed according to exposure commands generated by the imagesetter.

Abstract: A "direct-to-press" diffusion transfer reversal positive lithographic printing plate and method for exposing same. The "direct-to-press" printing plate provides an ink receiving image area and at least one ink repelling mechanical gripper area. Additionally, the plate can include at least one ink repelling border area. The "direct-to-press" printing plate exposure method provides direct exposure of a diffusion transfer reversal photo-lithographic recording substrate by a laser imagesetter using a method of controlling both the imagesetter recording beam and the movement of the recording substrate by the imagesetter. The imagesetter improvements allow exposure of a recording substrate in regions which could not previously be exposed by an imagesetter, providing a positive lithographic printing plate which requires no additional stripping or exposure steps after imagesetter recording.