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<p>[QUOTE=&quot;A Mexican, post: 545134, member: 17808&quot;]Definitely! Copper changes color based on the different alloys it contains and also their percentage of content of these other metals. Alloys containing copper have been made since ancient times and usually are done this way so it will become a stronger more durable alloy as a final product. The usual metals to make alloys with copper are tin and zinc. The combination of one or more would definitely change the shade of red.[/QUOTE]</p><p><br /></p>

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