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<p>[QUOTE=&quot;desertgem, post: 933889, member: 15199&quot;]The 2001 cent appears to have a little circulation, and that really enhances the chances of post mint damage ( effect). Probably hundreds of coins pass through a washing machine in every household, in pockets or eventually loose, exposed to detergents and whitening agents, and whatever. I have a few in the cup holder of my pickup which have odd color/texture from having spilled beverages dropping on them. I spend them. Of course it may be an entirely different scenario, but probably similar.</p><p><br /></p><p>Post 1982 cents have pure copper layers on the outside over zinc. Pre 1982 were a composite of 95% copper , 5% zinc. ( 1982 were a mix). The pure copper layer reacts much quicker and more actively than the 95%, so the later cents are prone to have texture/color problems to a greater extent.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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