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<p>[QUOTE=&quot;desertgem, post: 25325988, member: 15199&quot;]A chemist can change copper to almost any visual color. Hair coloring with copper compounds is over 40 different colors, artist colors of paint is usually over 60. Here is a list of the more common copper colors.</p><p><br /></p><p><a href="https://en.wikipedia.org/wiki/List_of_copper_salts" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/List_of_copper_salts" rel="nofollow">https://en.wikipedia.org/wiki/List_of_copper_salts</a></p><p><br /></p><p>These have been used to produce toning, but there is no easy way to keep them stable other than air sealed holders. Copper compounds do not usually changed over a short time so be cautious with the holders. As copper is exposed to environment air, they change and direction to deep dark brown. Time depends on your environment, such as pollutants ,humidity, household chemicals, etc.</p><p><br /></p><p>If you have faith&nbsp; with the seller, thats OK. If it is not, it may or may not turn out as you expect. IMO, Jim[/QUOTE]</p><p><br /></p>

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