METAL COLORING SOLUTION FOR CHEMICAL CONVERSION TREATMENT AND METHOD FOR COLORING METAL
Provided is a metal coloring solution for chemical conversion treatment and a method for coloring a metal, which can color a metal surface into a yellowish to brownish color tone with good treatment efficiency. The metal coloring solution for chemical conversion treatment contains: permanganic acid...
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Format: | Patent |
Sprache: | chi ; eng |
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