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So what's in the fabric of the mint bags? The coins were stored for years but no telling how long it took to tone the coins and if that process could be escalated.
So what's in the fabric of the mint bags? The coins were stored for years but no telling how long it took to tone the coins and if that process could be escalated.
Sulfur dioxide has been used in "bleaching" many organic products. More so in the past than now. Sulfur compounds also tended to limit mold and insect damage. Black ink to print on cloth in the last century used sulfides in its composition. Not sure if this made the condition or not.
You may find this article interesting.
http://rg.ancients.info/guide/toning.html
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I trust PCGS and NGC to weed out artificially toned and (overly-) cleaned coins. And I have to cause I don't have the equipment or the knowledge to make those judgements.
I trust PCGS and NGC to weed out artificially toned and (overly-) cleaned coins. And I have to cause I don't have the equipment or the knowledge to make those judgements.
This is not easy to do as toning whether "artificial" or "natural" is basically the same. The difference is time and motive. True, if the toning doesn't "look" right to the grader, it will be marked as questionable. For instance a Peace dollar toned like a Morgan. But is purposely putting a no-problem Morgan into a brown paper envelope for 30 years "artificial" or "natural"? What about 5 years? What about a year or 2 year on a window sill or in an unfinished oak box?
Maybe dipping in acid to remove toning should be consider as "artificial untoning" and be ethically as bad as AT, if used to make a coin sell better.
Fair should be fair. You don't have to dip a coin to conserve it and stop the toning process.
Jim















