| 摘要 |
The present invention provides a method for obtaining a lithographic printing plate according to the silver salt diffusion transfer process comprising the steps of: (a) image-wise exposing an imaging element comprising on a support (i) a photosensitive layer comprising one or more silver halide emulsions and (ii) an image receiving layer containing physical development nuclei being in water permeable relationship with said photosensitive layer (b) applying an aqueous alkaline solution to the imaging element in the presence of (a) developing agent(s) being applied by said aqueous alkaline and/or being present in the said imaging element and in the presence of (a) silver halide solvent(s) to form a silver image in said image receiving layer, (c) optionally applying a neutralizing solution to the imaging element, said aqueous alkaline solution being applied by a method in which said solution is supplied in a constant way only to the face of the imaging element on which a silver halide emulsion is applied, characterized in that said aqueous alkaline solution is applied in an amount so that the molar amount of alkali applied per m<2> is at least 3 times the molar amount of silver halide per m<2> in the imaging element and the total molar amount of developing agent applied per m<2> of imaging element and/or being present per m<2> in the imaging element is at least 0.60 times the molar amount of silver halide per m<2> in the imaging element.
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