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Luster: A guide for Beginners
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<p>[QUOTE="GDJMSP, post: 624896, member: 112"]It is not irregularities that create the cartwheel effect of luster, quite the contrary, it is the regularity of the metal flow lines that create it. Again, think of this simple illustration as being what the metal flow lines look like - /\/\/\/\/\/\</p><p><br /></p><p>Now if those metal flow lines were not all the same size the refection of light would be distorted and disturbed and there would be no cartwheel effect. Instead the refelction would be broken up and blurry, just like the surface of a mirror would be if the glass were uneven.</p><p><br /></p><p>It is precisely this uneven surface which reflects light in every direction and which we see as luster.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 624896, member: 112"]It is not irregularities that create the cartwheel effect of luster, quite the contrary, it is the regularity of the metal flow lines that create it. Again, think of this simple illustration as being what the metal flow lines look like - /\/\/\/\/\/\ Now if those metal flow lines were not all the same size the refection of light would be distorted and disturbed and there would be no cartwheel effect. Instead the refelction would be broken up and blurry, just like the surface of a mirror would be if the glass were uneven. It is precisely this uneven surface which reflects light in every direction and which we see as luster.[/QUOTE]
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