Peel-developable lithographic printing plate

Details Peel-developable lithographic printing plate Peel-developable lithographic printing plate

1996-03-11

1998-07-07

Baxter, Janet C.

Radiation imagery chemistry: process, composition, or product th

Stripping process or element

430258, 4302711, 4302811, 4302861, 430302, G03C 1112, G03C 1492

Patent

active

057766550

ABSTRACT:
A peel-developable lithographic printing plate is comprised of a substrate, a hydrophilic layer comprising a polymeric acid overlying the substrate, a radiation-sensitive image-forming layer overlying the hydrophilic layer and a stripping layer that is strippably adhered to the image-forming layer. The image-forming layer is comprised of a photo-polymerizable composition comprising a polymeric binder, a plurality of addition-polymerizable ethylenically-unsaturated compounds at least one of which possesses phosphorus-derived acidic functionality and a photopolymerization initiator. After imagewise exposure of the plate to activating radiation, the stripping layer is peeled from the image-forming layer with only the unexposed regions of the image-forming layer adhering thereto so as to reveal the underlying hydrophilic layer and thereby form a lithographic printing surface.

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