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<p>[QUOTE=&quot;Insider, post: 2875103, member: 24314&quot;]<font size="4"> I don&#039;t know why everything is coming out &quot;bold&quot; in this post...Sorry.</font></p><p><font size="4"><br /></font></p><p><font size="4"><b>Thanks Jim,</b></font></p><p><font size="4"><b>The link you have posted is one of the best descriptions I have read.&nbsp; Nevertheless, I&#039;ll add three things that will make it better...IMHO of course.</b></font></p><p><font size="4"><br /></font></p><p><font size="4"><b>Definition</b></font></p><p><b><br /></b></p><p><b>Mint Luster</b> on a coin&#039;s surface is the <b><i><span style="color: rgb(255, 0, 255)">sheen</span></i></b> or reflective qualities that are produced during the minting process. When a coin is struck, metal flows from the center of the coin towards the outer edge. [<span style="color: rgb(255, 0, 0)">This movement of metal over the die face causes microscopic grooves to be worn <b>INTO THE DIE</b> <b>SURFACE</b> that get larger with use.</span>] This process [<span style="color: rgb(255, 0, 0)">eventually</span>] produces microscopic striations (very tiny parallel grooves) [<span style="color: rgb(255, 0, 0)">on the struck coin as planchet metal flows into the groves in the die</span>] that reflect light back to the viewer in a unique crossing pattern.</p><p><font size="4"><br /></font></p><p><font size="4"><b>Affect from Coin Cleaning</b></font></p><p><br /></p><p>Coins that have been improperly cleaned will exhibit a muted or subdued luster. Uncirculated coins that still have their original surfaces will exhibit a flashy and bright mint luster [<span style="color: rgb(255, 0, 0)">possibly subdued when darkly toned</span>] that will dance across the coin as it is rotated and tilted.</p><p><br /></p><p>As for the word &quot;<i><span style="color: rgb(255, 0, 255)">sheen</span></i>&quot; and its correct usage, until I looked the word up in the dictionary and called a professional TPGS grader, it looks like the usage in the link, my usage for forty + years, and most of the usage I have heard and read over the decades has been incorrect.&nbsp; I have used/heard &quot;sheen&quot; used in combination with &quot;satin,&quot; &quot;frosty,&quot; etc. to describe the surface of certain coins. Apparently, it is only properly used to describe the luster (reflection of light from a surface, Doug <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" />) from cleaning or polishing.&nbsp; Nevertheless, I&#039;m too old to stop using &quot;sheen&quot; improperly.&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /></p><p><br /></p><p><br /></p><p><b>Cascade, posted:&nbsp; &quot;And will you just reply to what someone writes like a normal person insider!&quot;&nbsp; </b></p><p><b><br /></b></p><p><b>N-O spells no. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie7" alt=":p" unselectable="on" unselectable="on" /></b></p><p><b><br /></b></p><p><b></b>[/QUOTE]</p><p><br /></p>

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