Presensitized positive-proofing sheet containing a...

Details Presensitized positive-proofing sheet containing a... Presensitized positive-proofing sheet containing a...

G - Physics

03

C

96/200, 96/22, 9

G03C 11/12 (2006.01) G03C 3/00 (2006.01) G03C 7/00 (2006.01) G03F 3/10 (2006.01) G03F 7/021 (2006.01)

Patent

CA 1101260

ABSTRACT A presensitized positive acting sheet capable of providing both overlay and single sheet color pre- press proofing. The overlay system utilizes a sheet structure comprising a clear colorless transparent backing having a coating thereon of an appropriate pigmented polyvinyl acetal resin and a light sensitive layer thereover comprising a poly-complex oxygenated anion- diazonium salt. In the single sheet proofing system, the aforementioned structure also contains a barrier layer, and typically a pressure sensitive adhesive layer.

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