Method for making by phototypesetting a lithograph

专利名称：Method for making by phototypesetting a

lithographic printing plate according to thesilver salt diffusion transfer process

发明人：Lode Deprez申请号：US08/745831申请日：19961112公开号：US05691104A公开日：19971125

摘要：The present invention provides a method for making a lithographic printingplate according to the silver salt diffusion transfer process comprising the followingsteps:

image- wise exposing with a high intensity-short time exposure an imaging elementcomprising on a support a photosensitive layer comprising at least one photosensitivesilver halide emulsion comprising a heterocyclic compound containing at least onenitrogen atom in the ring and an image receiving layer comprising physical developmentnuclei in water permeable relationship with said photosensitive layer,

developing said imaging element using an alkaline processing liquid in the presence of(a) developing agent(s) and (a) silver halide solvent(s),

< P> characterized in that said heterocyclic compound containing at least onenitrogen atom in the ring comprises at least one mercapto- or thione group and onesubstituent comprising at least 5 carbon atoms selected from the group consisting oflinear or branched alkyls, alkenyls, alkynyls, aralkyls and alkylaryls.

申请人：AGFA-GEVAERT, N.V.

代理机构：Breiner & Breiner

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