Coloring method of tangible matter having polyamide bond and tangible matter colored by such method
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United States of America Patent
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Jan 13, 2009
Grant Date -
Apr 26, 2007
app pub date -
Nov 8, 2004
filing date -
Nov 12, 2003
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Abstract
A coloring method of a tangible matter having a polyamide bond, characterized in that the tangible matter having a polyamide bond is treated with an aqueous solution containing an aromatic derivative having one or more hydroxyl groups and a metal salt at a temperature of 40° C. or more, and a polyamide tangible matter colored by such a method.
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