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<p>[QUOTE=&quot;GDJMSP, post: 4055290, member: 112&quot;]Toning is toning regardless of color, but yes, all toning has a color. The thing is the number of possible colors is the full color spectrum. </p><p><br /></p><p>As for the difference between toning and dirt &amp; grime: toning is <b>in</b> the metal, meaning it doesn&#039;t wash off; dirt and grime is <b>on</b> the metal and it will wash off.</p><p><br /></p><p>Short and sweet toning is corrosion, it is the metal itself corroding, chemically changing from one substance to another substance. And all coins begin to tone the very moment they are struck. In point of fact the planchets were toning before the coin was ever struck. But by being struck fresh metal is exposed by metal flow and then that fresh metal begins to tone. </p><p><br /></p><p>And toning can never be stopped unless you can stop the metal from being exposed to air. Air, and what&#039;s in it, is what causes the metal to corrode, to tone. You can greatly slow down toning/corrosion by limiting the amount of air that can get to the coin, but you can&#039;t stop it because there&#039;s no such thing as an airtight coin holder. </p><p><br /></p><p>That said, yeah there are airtight containers that you can put a coin into and seal it up, and the coin will tone/corrode a little bit until the air inside the container is used up by the corrosion and once it is used up the toning will stop - until new, fresh air is introduced into the container by opening it.[/QUOTE]</p><p><br /></p>

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