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Have you ever wondered what luster looks like?
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<p>[QUOTE="physics-fan3.14, post: 3323528, member: 19165"]Some of [USER=31773]@rmpsrpms[/USER] super-extremely-enlarged photos show the same thing. This is a really cool effect to see, and your pictures clearly show the flowlines.</p><p><br /></p><p>Now, what would be really interesting, is to take a cheap coin (pull a quarter out of a modern roll, or something), photograph the flowlines, and then clean it. Show us exactly how the cleaning would affect these lines.</p><p><br /></p><p>Might be cool to compare a few different cleaning methods, while you're at it - how does baking soda vs. wire brush vs. jeweler's rag vs. dip affect the lines?</p><p><br /></p><p>I think that first picture, showing the hairlines going up onto the E, is a very valuable teaching tool.[/QUOTE]</p><p><br /></p>
[QUOTE="physics-fan3.14, post: 3323528, member: 19165"]Some of [USER=31773]@rmpsrpms[/USER] super-extremely-enlarged photos show the same thing. This is a really cool effect to see, and your pictures clearly show the flowlines. Now, what would be really interesting, is to take a cheap coin (pull a quarter out of a modern roll, or something), photograph the flowlines, and then clean it. Show us exactly how the cleaning would affect these lines. Might be cool to compare a few different cleaning methods, while you're at it - how does baking soda vs. wire brush vs. jeweler's rag vs. dip affect the lines? I think that first picture, showing the hairlines going up onto the E, is a very valuable teaching tool.[/QUOTE]
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Have you ever wondered what luster looks like?
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