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Toning examples... how, why....what?
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<p>[QUOTE="gsimonel, post: 4894791, member: 82549"]This is <i>usually</i> the case, but not always. Some patinas, especially light bluish-green patinas, can sometimes be very fragile and easily chipped off. This type of patina seems to me more common on provincial coins than imperial. I'm not sure why this is--possibly local environmental conditions, or perhaps it has something to do with the chemistry of orichalcum vs. bronze.</p><p> Here's an example from my collection. Had this coin retained all its original patina, it would be quite a beauty. Notice that where the patina has broken off, much of the fine detail has been lost along with it:</p><p><img src="http://feltemp.com/Images/GoldenAge/MarcusAurelius.JPG" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><b>Marcus Aurelius</b></p><p><i>Caesar, A.D. 139-161</i></p><p><i>Augustus, A.D. 161-180</i></p><p>Provincial Bronze (AE26)</p><p>Moesia Inferior, Nikopolis ad Istrum, before A.D. 161</p><p>Obv: AVPHΛIOC OVHPOC KAICAP</p><p>Rev: NEIKOΠOΛEITΩNΠPOC IC - Serapis, standing left, holding scepter and sacrificing with patera over altar.</p><p>Unlisted in Moushmov or RPC; unpublished?</p><p>26mm, 11.0g.[/QUOTE]</p><p><br /></p>
[QUOTE="gsimonel, post: 4894791, member: 82549"]This is [I]usually[/I] the case, but not always. Some patinas, especially light bluish-green patinas, can sometimes be very fragile and easily chipped off. This type of patina seems to me more common on provincial coins than imperial. I'm not sure why this is--possibly local environmental conditions, or perhaps it has something to do with the chemistry of orichalcum vs. bronze. Here's an example from my collection. Had this coin retained all its original patina, it would be quite a beauty. Notice that where the patina has broken off, much of the fine detail has been lost along with it: [IMG]http://feltemp.com/Images/GoldenAge/MarcusAurelius.JPG[/IMG] [B]Marcus Aurelius[/B] [I]Caesar, A.D. 139-161 Augustus, A.D. 161-180[/I] Provincial Bronze (AE26) Moesia Inferior, Nikopolis ad Istrum, before A.D. 161 Obv: AVPHΛIOC OVHPOC KAICAP Rev: NEIKOΠOΛEITΩNΠPOC IC - Serapis, standing left, holding scepter and sacrificing with patera over altar. Unlisted in Moushmov or RPC; unpublished? 26mm, 11.0g.[/QUOTE]
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Toning examples... how, why....what?
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