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<p>[QUOTE="GDJMSP, post: 2916837, member: 112"]The answer is simple and complicated at the same time. The simple part is how coins look and or change over time is merely a factor of their environment. The complicated part is all the different environments, and there are so many different environments that they defy counting.</p><p><br /></p><p>Ya see, every single thing there is plays a part. First, the primary enemies of coins are air, moisture, and temperature. The comes everything else around them for what is in the air, and the moisture, and the temperature is all determined by everything else around them. And when I say everything I really do mean everything ! Form the geographical location of where you live, or rather where the coins live, to the paint on the walls of your home, to the kind of carpet you have, to the type of heating system you have - literally everything plays a part. For it all of those things combined that determine what is or is not in the air.</p><p><br /></p><p>You asked about the Whitman folders, well they are made of paper. And almost all paper is laden with sulfur. And as paper decays, and everything decays, the paper puts off sulfur, among other things, into the air. And since paper in direct contact with the coin then naturally the coin is exposed to those gasses put off by the paper. And, the coin is also exposed to the glues used in Whitman folders, the coins are in fact in direct contact with the glues. So these things combined with everything else that is in the air and the moisture which is in the air as well, and the temperature - all of these things determine how a coin is going to look as time passes for the coin itself is also decaying. But we don't call it decaying, we call it toning, but in reality decay is what it is for the metal is breaking down into different chemical components as time passes.</p><p><br /></p><p>So how do you avoid this, how do you stop it ? You can't really because of what the enemies of coins are - air, moisture, and temperature. And since there is no such thing as an airtight coin holder the very best you can hope for is to slow it down as much as you can. And you do that with proper storage techniques. Which is what we have talking about with you ever since you joined the forum.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 2916837, member: 112"]The answer is simple and complicated at the same time. The simple part is how coins look and or change over time is merely a factor of their environment. The complicated part is all the different environments, and there are so many different environments that they defy counting. Ya see, every single thing there is plays a part. First, the primary enemies of coins are air, moisture, and temperature. The comes everything else around them for what is in the air, and the moisture, and the temperature is all determined by everything else around them. And when I say everything I really do mean everything ! Form the geographical location of where you live, or rather where the coins live, to the paint on the walls of your home, to the kind of carpet you have, to the type of heating system you have - literally everything plays a part. For it all of those things combined that determine what is or is not in the air. You asked about the Whitman folders, well they are made of paper. And almost all paper is laden with sulfur. And as paper decays, and everything decays, the paper puts off sulfur, among other things, into the air. And since paper in direct contact with the coin then naturally the coin is exposed to those gasses put off by the paper. And, the coin is also exposed to the glues used in Whitman folders, the coins are in fact in direct contact with the glues. So these things combined with everything else that is in the air and the moisture which is in the air as well, and the temperature - all of these things determine how a coin is going to look as time passes for the coin itself is also decaying. But we don't call it decaying, we call it toning, but in reality decay is what it is for the metal is breaking down into different chemical components as time passes. So how do you avoid this, how do you stop it ? You can't really because of what the enemies of coins are - air, moisture, and temperature. And since there is no such thing as an airtight coin holder the very best you can hope for is to slow it down as much as you can. And you do that with proper storage techniques. Which is what we have talking about with you ever since you joined the forum.[/QUOTE]
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