A method for making a lithographic printing plate.

摘要

The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process comprising the steps of: image-wise exposing an imaging element comprising on a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei in water permeable relationship with said emulsion layer, developing said imaging element in the presence of developing agent(s) and silver halide solvent(s) using an alkaline processing solution and treating the thus obtained developed imaging element using a neutralizing solution having a pH between 5 and 10.5, characterized in that said neutralizing solution contains in a total concentration between 0.03 and 3 mole/l one or more compounds not including cysteine or triethylenetetramine hexa-acetic acid, corresponding to the following formula: NR<1>R<2>R<3> wherein R<1> represents a C1-C12 hydrocarbon group containing a hydrophilic group and R<2> and R<3> each independently represents a hydrogen, a C1-C12 hydrocarbon group or R<2> and R<3> together with the atoms to which they are attached complete a 5- or 6- membered ring, with the proviso that at least 2 of the groups represented by R<1>, R<2> and R<3> are aliphatic groups.