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<p>[QUOTE=&quot;physics-fan3.14, post: 2381327, member: 19165&quot;]The plastic itself is not the issue. There is a very high chance that foreign matter will get into the plastic (dust, grit, etc), and that is what will do the damage. The coins themselves are also likely dirty (unless you&#039;ve freshly dipped them....), and may contribute to this problem. </p><p><br /></p><p>I&#039;ve seen coins damaged from the grit embedded in plastic, several times. </p><p><br /></p><p>I have also seen coins damaged by staples, as they were removed from 2x2s, more times than I care to count. </p><p><br /></p><p>Every storage method has its hazards, and should be considered before use.[/QUOTE]</p><p><br /></p>

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