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<p>[QUOTE=&quot;CoinDude08, post: 140275, member: 5266&quot;]Regular toning, atleast in silver coins, occurs when oxygen and other chemicals react with the surface of the coin turning it colors. Often times old coin folders and high sulfur envelops can help speed up toning. I have also heard about pollutants from cars, gas heating systems, power plants, steel mills, etc can also expedite toning. Now... here is where the line gets fuzzy: You can help make your coins tone faster if you place them in a window and expose them to lots of air and sunlight for a period of months. Now some say this is artificial because you are conciously trying to tone the coins, other say it is not because you are not actually manipulating the surface of the coin, you are simply utilizing nature. Now what everyone agrees on is that artificial toning includes using chemicals such as acids and dyes to change the color of the surface of the coin. Some people also blow cigar or cigarette smoke on coins to give them a brown/yellow appearance. Ive also heard of things such as baking coins in a potato for several hours and thumbing the coin with some sort of grease or oil over a period of weeks. For more information I would recomend googling the subject.[/QUOTE]</p><p><br /></p>

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