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<p>[QUOTE="Silverlock, post: 6993695, member: 98181"]This coin has sharply struck XF features, yet the individual who prepped it thought leaving a layer of black “patina” (which would safely dissolve in a solvent) was the best way to present it? Not a chance. The black crud is a crude attempt to cover flaws that would expose deception.</p><p><br /></p><p>One lesson we can safely share from this and the OP example is an inappropriate amount of prepping is a red flag. It’s useful to remember every ancient coin is prepped. Fake patinas, adhesions, and perfectly uniform coloration (say when a group of coins offered have uniform sandy coloration, for example) are used to hide tooling, modern methods, lack of or inappropriate flow lines, machined cracks, casting bubbles, and other evidence of deception. The deception isn’t limited to fakes, as these same methods are also used on genuine coins to conceal corrosion, physical damage, and active bronze disease. I made an prior post about a Ptolemaic bronze with the latter.</p><p><br /></p><p>I hasten to say not every inappropriately cleaned coin is a problem coin. But it is a red flag worthy of additional scrutiny.</p><p><br /></p><p>I’m happy to share this because there is nothing the deceiver can do about it.[/QUOTE]</p><p><br /></p>
[QUOTE="Silverlock, post: 6993695, member: 98181"]This coin has sharply struck XF features, yet the individual who prepped it thought leaving a layer of black “patina” (which would safely dissolve in a solvent) was the best way to present it? Not a chance. The black crud is a crude attempt to cover flaws that would expose deception. One lesson we can safely share from this and the OP example is an inappropriate amount of prepping is a red flag. It’s useful to remember every ancient coin is prepped. Fake patinas, adhesions, and perfectly uniform coloration (say when a group of coins offered have uniform sandy coloration, for example) are used to hide tooling, modern methods, lack of or inappropriate flow lines, machined cracks, casting bubbles, and other evidence of deception. The deception isn’t limited to fakes, as these same methods are also used on genuine coins to conceal corrosion, physical damage, and active bronze disease. I made an prior post about a Ptolemaic bronze with the latter. I hasten to say not every inappropriately cleaned coin is a problem coin. But it is a red flag worthy of additional scrutiny. I’m happy to share this because there is nothing the deceiver can do about it.[/QUOTE]
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