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US 4,153,461 AGranted
Layer support for light-sensitive material adapted to be converted into a planographic printing plate
AssigneeHoechst Aktiengesellschaft
InventorsGunter Berghauser, Fritz Uhlig
Life of this patent
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Abstract
This invention relates to an aluminum base material for presensitized printing plates. The aluminum has an anodically produced oxide layer on the surface thereof, which layer is at least 0.0002 mm. thick, and the oxide layer is reacted with polyvinyl phosphonic acid.
Claims3
An aluminum base, for use in the manufacture of presensitized printing plates, having a surface which is the reaction product of polyvinyl phosphonic acid with an anodically produced aluminum oxide layer having a thickness in the range of about 0.0002 to 0.01 mm.
Dependencies are inferred from the claim text.