Heat mode sensitive imaging element for making positive working printing plates
AssigneeAgfa-Gevaert
InventorsEric Verschueren, Huub Van Aert, Joan Vermeersch, Marc Van Damme, Guido Hauquier
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Abstract
The present invention is directed to a heat mode imaging element for making a lithographic printing plate including on a lithographic base with a hydrophilic surface, a first layer including a polymer, soluble in an aqueous alkaline solution, and a top layer on the same side of the lithographic base as the first layer. The top layer is IR-sensitive and unpenetrable for an alkaline developer. The first layer and the top layer may be one and the same layer. The top layer is characterized in that it contains at least one compound containing epoxy units in an amount between 20 and 500 mg/m.sup.2 and a hardener.
Claims10
A heat mode imaging element for making a lithographic printing plate comprising on a lithographic base with a hydrophilic surface a first layer including a polymer, soluble in an aqueous alkaline solution and a top layer on the same side of the lithographic base as the first layer which top layer is IR-sensitive and unpenetrable for an alkaline developer wherein said first layer and said top layer may be one and the same layer;
- characterized in that said top layer contains at least one compound containing epoxy units in an amount between 20 and 500 mg/m.sup.2 and a hardener.
Dependencies are inferred from the claim text.