Metal articles with smooth surface having durable visible marking and method of manufacture
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United States of America Patent
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May 24, 2005
Grant Date -
Mar 18, 2004
app pub date -
Sep 13, 2002
filing date -
Sep 13, 2002
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Abstract
Metal articles having a durable visible marking on a smooth Type III hard anodized surface particularly useful for shock absorber tubes are produced by applying an alkaline solution to the anodized surface for not less than about 15 seconds at temperature of 100°-140° F.; applying a pattern of lacquer based solvent ink to said surface; and sealing the applied pattern by applying a liquid selected from the group consisting of nickel acetate, cobalt acetate and boiling water to said pattern.
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