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Process for a two-stage hydrophilizing post-treatment of aluminum oxide layers with aqueous solutions and use thereof in the manufacture of supports for offset printing plates

  • US 4,689,272 A
  • Filed: 02/15/1985
  • Issued: 08/25/1987
  • Est. Priority Date: 02/21/1984
  • Status: Expired due to Fees
First Claim
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1. A process for manufacturing a roughened and anodically oxidized aluminum or aluminum alloy substrate, comprising the steps of:

  • (a) treating an aluminum oxide layer carried on a substrate comprised of aluminum or aluminum alloy in a first aqueous solution containing an alkali metal silicate; and

    then(b) treating said aluminum oxide layer(b) treating said aluminum oxide layer in a second aqueous solution containing at least one organic polymer comprised of at least one from the group consisting of vinylphosphonic acid monomers and vinylmethylphosphinic acid monomers.

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