Method for obtaining a printing plate according to the silver sa

Details Method for obtaining a printing plate according to the silver sa Method for obtaining a printing plate according to the silver sa

1994-05-25

1995-07-11

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430248, 430249, 430251, 101466, G03C 832, G03C 836, G03F 707

Patent

active

054320429

ABSTRACT:
The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process using a photographic material comprising on a support a silver halide emulsion layer and a layer containing physical development nuclei comprising the steps of:
image-wise exposing said photographic material and
developing a thus obtained image-wise exposed photographic material by guiding said image-wise exposed photographic material through an alkaline processing liquid in 15 s or less; characterized in that said alkaline processing liquid comprises a hydrophobizing compound having a mercapto group that has a pK.sub.a of 4.5 or less.

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