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<p>[QUOTE=&quot;JCro57, post: 4625239, member: 92083&quot;]An improper alloy mixture is just that:&nbsp; <u>T</u>he alloy (i.e. molten metals which fuse and form one solid metallic mass vs. pressed together like clad or plated like zinc Lincoln cents) has been compromised and the mixture of its contents is not proper.</p><p><br /></p><p>It could be that impurities/contaminants corrupted the mixture (dust, dirt, etc.), <b>or </b>that the percentages of the ingredients is off significantly, <b>or </b>it could be that some of the metallic particles didn&#039;t fully melt completely, <b>or </b>a combination of these.</p><p><br /></p><p>In any of these cases, improper alloy mixes can sometimes result in various color patterns that are abnormal. They can appear as stripes, blotches, irregular patterns, shades, and can compromise the integrity of the metal itself resulting in laminations, cracks, splitting, and other planchet defects, but many show no signs of laminations or cracks.</p><p><br /></p><p>Here are 2 coins I own which are improper alloy mixtures. </p><p><br /></p><p>[ATTACH=full]1144782[/ATTACH] [ATTACH=full]1144783[/ATTACH] [ATTACH=full]1144786[/ATTACH]</p><p>[ATTACH=full]1144785[/ATTACH][/QUOTE]</p><p><br /></p>

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