Colorless sealing layers for anodized aluminum surfaces
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United States of America Patent
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Jul 12, 1988
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N/A
app pub date -
Apr 14, 1987
filing date -
Jan 3, 1985
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Expired
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Abstract
A process and composition for producing colorless, cold-sealed, anodized aluminum or aluminum alloy surfaces. The composition comprises an aqueous solution containing nickel ions and a solution of at least one azo or azo metal dye, the colors imparted by the nickel ions and dye offsetting each other.
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