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<p>[QUOTE=&quot;physics-fan3.14, post: 2038410, member: 19165&quot;]Because I am familiar with the appearance of die polish. The prooflike coins of the mid 20th century are characterized by strong die polish - this repolishing appearance led to the creation of the prooflike fields. These surfaces are unlike the majority of business strike coins, and these are the coins I specialize in.</p><p><br /></p><p>Die polish and hairlines affect luster in very different ways. Because die polish is an effect on the die, the luster will be uninterrupted and will still cartwheel. Because hairlines from polishing are post-mint, they will interrupt the flowlines of the luster. The luster of a cleaned coin will appear to travel in the direction of the hairlines (and will have an unnatural sheen). There is a significant difference between the appearance of mint-made die polish, and the post mint hairlines due to cleaning. I am educated and experienced enough to tell the difference. The TPGs are also far more educated and experienced than both of us.</p><p><br /></p><p>Second, die polish is definitely raised from the surface, and hairlines are incused in the surfaces of the coin. Your assertion that there would be corresponding high and low lines would make sense - if there was no metal removal. For a gouge, there will be metal movement but generally no metal removal (and hence there will be a valley and corresponing high point). When a coin is polished with a steel brush, there is some metal removed, leaving just incused lines. Likewise, when a die is polished, there was some definite metal removal, and hence only incused lines (which appear as raised lines on a coin). The amount of metal removed can be seen by looking at heavily polished coins where the details appear to disappear into the fields (for example, the missing bridge of Washington&#039;s nose in the example above.)</p><p><br /></p><p>While die polish may often generally be parallel, making an absolute statement that it always appears this way is wrong. And while die polish may often only appear in the fields and skip the devices, saying that it is never seen on the devices is wrong. Making absolute statements that something is *always* a certain way is indefensible.</p><p><br /></p><p>Also, what &quot;logic&quot; and &quot;documentation&quot; have you provided? Please now explain why you are convinced that these are not die polish.[/QUOTE]</p><p><br /></p>

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