UV-sensitive imaging element for making lithographic printing plates comprising an aryldiazosulfonate polymer and a compound sensitive to UV light
AssigneeAgfa-Gevaert
InventorsMarc Van Damme, Peter Hendri kx, Huub Van Aert
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Abstract
An imaging element is disclosed for making a lithographic printing plate comprising a lithographic support and an imaging layer comprising (i) a polymer having aryldiazosulfonate units and/or aryltriazenylsulfonate units and (ii) a compound capable of generating a radical and/or an acid upon exposure to UV light. The imaging element can be exposed by UV light and developed by water or an aqueous solution. Exposure and/or development can be performed on or off press.
Claims9
An imaging element for making a lithographic printing plate comprising a lithographic support and an imaging layer comprising
- (i) a polymer having aryldiazosulfonate units and/or aryltriazenylsulfonate units and
- (ii) a compound capable of generating a radical and/or an acid upon exposure to UV light.
Method for making a lithographic printing plate comprising the steps of:
- 1. providing an imaging element comprising an imaging layer comprising (i) a polymer having aryldiazosulfonate units and/or aryltriazenylsulfonate units and (ii) a compound capable of generating a radical and/or an acid upon exposure to UV light;
- 2. image-wise exposing said imaging element to UV-light;
- 3. mounting the imaging element on a press;
- and
- 4. developing the imaging element by applying water or an aqueous solution.
Dependencies are inferred from the claim text.