Aluminum substrates and lithographic printing plate precursors
AssigneeEastman Kodak Company
InventorsGerhard Hauck, Celin Savariar-Hauck, Oliver R. Blum, Michael Nielinger
Life of this patent
Estimating the term…
Abstract
Electrochemically grained and anodized aluminum supports are treated with a post-treatment coating solution containing a polymer derived at least in part from vinyl phosphonic acid and phosphoric acid. This post-treated support is useful as substrates in the preparation of lithographic printing plate precursors. The post-treatment substrate treatment enables wide latitude in manufacturing and compatibility with silicate-free developers to achieve negligible background staining and oxide attack.
Claims28
An electrochemically grained, anodized aluminum substrate comprising a post-treatment coating that has been applied after electrochemical graining and anodization, the post-treatment coating comprising a polymer derived at least in part from vinyl phosphonic acid, and the post-treatment coating having been applied from a post-treatment coating solution comprising the polymer and phosphoric acid.
A lithographic printing plate precursor comprising a substrate having thereon one or more imageable layers comprising a polymeric binder, and the precursor further comprising an infrared radiation absorber,
- the substrate being an electrochemically grained, anodized aluminum substrate comprising a post-treatment coating that has been applied after electrochemical graining and anodization, the post-treatment coating comprising a polymer derived at least in part from vinyl phosphonic acid, and the post-treatment coating having been applied from a post-treatment coating solution comprising the polymer and phosphoric acid.
A method for providing a lithographic printing plate comprising:
- imagewise exposing a lithographic printing plate precursor comprising a substrate having thereon one or more imageable layers, each imageable layer comprising a polymeric binder, and the precursor further comprising an infrared radiation absorber,
- the substrate being an electrochemically grained, anodized aluminum substrate comprising a post-treatment coating that has been applied after electrochemical graining and anodization, the post-treatment coating comprising a polymer derived at least in part from vinyl phosphonic acid, and the post-treatment coating having been applied from a coating solution comprising the polymer and phosphoric acid,
- to provide exposed and non-exposed regions in the one or more imageable layers in an exposed precursor, and
- processing the exposed precursor to remove either the exposed or non-exposed regions.
A method for preparing a substrate useful for lithographic printing plates, the method comprising:
- applying a post-treatment coating solution to an electrochemically grained, anodized aluminum support to provide a post-treatment coating, the post-treatment coating solution comprising a polymer derived at least in part from vinyl phosphonic acid, and phosphoric acid.
Dependencies are inferred from the claim text.