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<p>[QUOTE="physics-fan3.14, post: 624558, member: 19165"]Thank you GDJMSP for your excellent reply. You make some great points, especially about the prooflike coins. You also make a good point about the metal itself flowing, which is one important aspect of luster. </p><p><br /></p><p>Given that luster is diffused light due to surface irregularities, is it not reasonable to say that a later die state, with more worn dies, is going to have more irregularities? It is precisely this uneven surface which reflects light in every direction and which we see as luster. However, this later die state luster will definitely have a different look than an early die state luster. Its hard to describe, but I might almost call it coarser - which would make sense given the larger size of the flow lines etched into the die repeatedly.[/QUOTE]</p><p><br /></p>
[QUOTE="physics-fan3.14, post: 624558, member: 19165"]Thank you GDJMSP for your excellent reply. You make some great points, especially about the prooflike coins. You also make a good point about the metal itself flowing, which is one important aspect of luster. Given that luster is diffused light due to surface irregularities, is it not reasonable to say that a later die state, with more worn dies, is going to have more irregularities? It is precisely this uneven surface which reflects light in every direction and which we see as luster. However, this later die state luster will definitely have a different look than an early die state luster. Its hard to describe, but I might almost call it coarser - which would make sense given the larger size of the flow lines etched into the die repeatedly.[/QUOTE]
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