Processless lithographic printing plate
AssigneeAgfa-Gevaert
InventorsHieronymus Andriessen, Catherine Brigouleix, Alain Tressaud
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Abstract
A positive-working, heat-sensitive material for making a lithographic printing plate by direct-to-plate recording is disclosed. The material comprises a hydrophobized grained and anodized aluminum support and a layer comprising a compound capable of converting light into heat provided onto said support, said support being obtainable by RF plasma treatment of a grained and anodized aluminum support in the presence of a fluorine containing gas.
Claims17
A positive-working, heat-sensitive material for making a lithographic printing plate by direct-to-plate recording, the material comprising a hydrophobized grained and anodized aluminum support and a layer comprising a compound capable of converting light into heat provided on said support, said support being obtainable by RF plasma treatment of a grained and anodized aluminum support in the presence of a fluorine containing gas.
A method for making a positive-working, heat-sensitive printing plate precursor comprising the steps of:
- (i) hydrophobizing a grained and anodized aluminum support by RF plasma treatment of said grained and anodized aluminum support in the presence of a fluorine containing gas;
- and
- (ii) coating a compound capable of converting light into heat onto said support,
- wherein the RF plasma treatment is carried out for a period of 15 to 60 minutes, utilizing a pressure of 3 to 30 Pa at a temperature of 25 to 90° C.
Dependencies are inferred from the claim text.