Process for providing a tortoise-shell chromatic effect to metallic substrates
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United States of America Patent
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Issued Date -
Aug 28, 2003
app pub date -
Feb 6, 2003
filing date -
Feb 15, 2002
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a chemical process for providing a tortoise-shell chromatic effect to nickelated metallic substrates, which comprises heating the metallic substrate to 100-110 .degree. C. and subsequent buffering at a temperature of 40-110.degree. C. with an oxidizing solution based on sodium thiosulfate, a reagent metal and an acidifying compound.
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