Sounding out Congo Red

Brightly colored dyes such as the shimmering Congo Red commonly used in silk clothing manufacture are notoriously difficult to dispose of in an environmentally benign way.

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<p><a href="http://www.physorg.com/news129299308.html">Sounding out Congo Red</a></p> <p>Brightly colored dyes such as the shimmering Congo Red commonly used in silk clothing manufacture are notoriously difficult to dispose of in an environmentally benign way.</p>