Lithographische Druckform nach dem Verfahren der Silbersalz-Diffusionübertragung

• Main Author: VAN ROMPUY LUDO
• Format: Patent
• Language: German
• Published: 09.05.1996
• Edition: 6
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; MATERIALS THEREFOR; ORIGINALS THEREFOR; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS

The present invention provides a method for making a lithographic printing plate according to the DTR-process comprising the steps of: information-wise exposing an imaging element comprising on a support in the order given a photosensitive layer containing a silver halide emulsion and a layer containing physical development nuclei; developing said information-wise exposed imaging element in the presence of developing agent(s) and silver halide solvent(s) characterized in that said silver halide emulsion comprises said silver halide in an amount of at least 2g/m (expressed as AgNO3), said development is carried out in the presence of a physical development restraining compound and wherein imaging elements comprising a positive working silver halide emulsion of the internal latent image type are excluded. Lithographic printing plates with substantially improved printing endurance are obtained.