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<p>[QUOTE=&quot;Ordinary Fool, post: 2670573, member: 85318&quot;]Your explanation only describes their appearance as defined by the accepted broad meaning of the term, &quot;toning&quot;.</p><p><br /></p><p>I&#039;ve shown how they appear under repeatable conditions.</p><p><br /></p><p>The definition and description you provided does not address these 2010+ specific tiny spots or attribute them to what has to be a very specific cause. These spots are quite common in the series as the highest MS grade slab in the shield series has more of these tiny spots than I can count. Do any of the high graded memorial zinkers? If they do, I am unaware but, open to being shown and educated.</p><p><br /></p><p>Your explanation does not explain why earlier zinc coins do not show the same &quot;toning&quot;.</p><p><br /></p><p>The other gent offered that the US Mint announced a change to the planchet rinsing process in 2000. I do not know if I have overlooked these spots, especially with respect to those spots presenting as heat affected zones, in the pre-shield 2000+ series and candidly, I have no mint rolls of them to check. It is unlikely I&#039;ll go out of my way to buy any for the purpose, but, if some fall into my lap, I likely will investigate. </p><p><br /></p><p>Would it be helpful for me to provide photographs showing BU&#039;s with much larger HAZ&#039;s and plating pierced? Helpful in perhaps momentarily erasing preconceived prejudice and discussing exactly what is shown with the application of free-thinking and logic?</p><p><br /></p><p>There are not 1,000,000, or even 50 different ways to cause these specific type spots to consistently affect huge numbers of BU shield pennies. I believe that is quite a reasonable assertion that shouldn&#039;t be hard to concede as fact.[/QUOTE]</p><p><br /></p>

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