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<p>[QUOTE=&quot;GDJMSP, post: 677606, member: 112&quot;]Not necessarily. Roll friction, that&#039;s friction marks on the face of the coin due to the coins rubbing against each other while they are in the roll, does occur. But that does not mean that it <u>has</u> to occur every single time.</p><p><br /></p><p>With most coins the high point on either side is not the rim, but some part of the devices. And if you think about it, the positioning of the coins insode the roll plays a major part in whether roll friction develops or not. For the high points on the one coin can correspond to the low points on the coin against it. If this were the case, then roll friction is less likely to occur. Conversely, high points against high points is almost certainly to cause some roll friction.</p><p><br /></p><p>Also, how much and how often the stored rolls are moved around matters as well. The more movement, then the more roll friction occurs.[/QUOTE]</p><p><br /></p>

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