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<p>[QUOTE="Insider, post: 8348453, member: 24314"]<i><span style="color: #660033">Again, Roger did not comment on Proof luster in his quote as you accidentally or incorrectly implied with this post and its source:</span> </i></p><p><br /></p><p>"And technically, <b>a proof coin does NOT have luster </b>-- even though it is super-reflective ?</p><p><br /></p><p><b>I'm going by the chapter on LUSTER from RWB's Saint-Gaudens DE book."</b></p><p><br /></p><p><i><span style="color: #660033">Now that's settled right? </span></i> </p><p><br /></p><p><i><span style="color: #660033">Next, I've already posted my thoughts on "luster." Let's see if I can answer your specific question about Roger's thoughts. </span></i></p><p><br /></p><p>GoldFinger1969, posted: "]<b><u>From the Saint-Gaudens Double Eagle book (and this might ONLY apply to Saints, not saying it applies to other coins from that era or coins struck decades later):</u></b></p><p><b><u><br /></u></b></p><p><i>[<span style="color: #660033">Mint</span>]"Luster......is the visual result of light reflecting off of thousands of tiny ridges and grooves of metal in the smooth (field) areas of a coin. [<span style="color: #660033">Mint luster of some kind occurs on <b>ALL areas of the coin</b> including the rim</span>] These imperfections were created in a working die as the hard steel was stressed during the striking of thousands of blank planchets.</i></p><p><br /></p><p><i>The original surface of a coinage die is smooth....and largely free of imperfections.....The pressure, or force, applied to the planchet was approximately 100-120 tons per square inch.....<b>with each blow of the die, an imperceptible movement occured in the crystals of the die face. </b></i></p><p><br /></p><p><i><b>Following several hundred strikes, the die face had distored slightly so that the fields were no longer completely smooth, but consisted of miscroscopic ridges and grooves.</b></i></p><p><br /></p><p><i>This type of surface alteration was most prominent in the fields of a die [<span style="color: #660033">especially near the rim</span>]where movement of the metal was greatest and least inhibited by details of the design. The portrait, inscriptions, and other design elements were sujbect to similar die deformation, but at a <font size="5"><span style="color: #006633">much lower rate and magnitude.</span></font> [Yes!] <span style="color: #000000"><b>This explains why a coin shows luster in the fields but </b></span><span style="color: #b30000"><b><font size="5">not in the raised areas.</font>" [</b></span><span style="color: #660033">This is </span><b><span style="color: #b30000">not correct</span></b><span style="color: #660033">. Probably a result of Roger trying to keep things simple. <b>Luster is on all parts of the coin where its surface is still original.</b></span></i>[/QUOTE]</p><p><br /></p>
[QUOTE="Insider, post: 8348453, member: 24314"][I][COLOR=#660033]Again, Roger did not comment on Proof luster in his quote as you accidentally or incorrectly implied with this post and its source:[/COLOR] [/I] "And technically, [B]a proof coin does NOT have luster [/B]-- even though it is super-reflective ? [B]I'm going by the chapter on LUSTER from RWB's Saint-Gaudens DE book."[/B] [I][COLOR=#660033]Now that's settled right? [/COLOR][/I] [I][COLOR=#660033]Next, I've already posted my thoughts on "luster." Let's see if I can answer your specific question about Roger's thoughts. [/COLOR][/I] GoldFinger1969, posted: "][B][U]From the Saint-Gaudens Double Eagle book (and this might ONLY apply to Saints, not saying it applies to other coins from that era or coins struck decades later): [/U][/B] [I][[COLOR=#660033]Mint[/COLOR]]"Luster......is the visual result of light reflecting off of thousands of tiny ridges and grooves of metal in the smooth (field) areas of a coin. [[COLOR=#660033]Mint luster of some kind occurs on [B]ALL areas of the coin[/B] including the rim[/COLOR]] These imperfections were created in a working die as the hard steel was stressed during the striking of thousands of blank planchets.[/I] [I]The original surface of a coinage die is smooth....and largely free of imperfections.....The pressure, or force, applied to the planchet was approximately 100-120 tons per square inch.....[B]with each blow of the die, an imperceptible movement occured in the crystals of the die face. [/B][/I] [I][B]Following several hundred strikes, the die face had distored slightly so that the fields were no longer completely smooth, but consisted of miscroscopic ridges and grooves.[/B][/I] [I]This type of surface alteration was most prominent in the fields of a die [[COLOR=#660033]especially near the rim[/COLOR]]where movement of the metal was greatest and least inhibited by details of the design. The portrait, inscriptions, and other design elements were sujbect to similar die deformation, but at a [SIZE=5][COLOR=#006633]much lower rate and magnitude.[/COLOR][/SIZE] [Yes!] [COLOR=#000000][B]This explains why a coin shows luster in the fields but [/B][/COLOR][COLOR=#b30000][B][SIZE=5]not in the raised areas.[/SIZE]" [[/B][/COLOR][COLOR=#660033]This is [/COLOR][B][COLOR=#b30000]not correct[/COLOR][/B][COLOR=#660033]. Probably a result of Roger trying to keep things simple. [B]Luster is on all parts of the coin where its surface is still original.[/B][/COLOR][/I][/QUOTE]
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