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<p>[QUOTE=&quot;Valentinian, post: 2300208, member: 44316&quot;]Be careful with the paper or cardstock you use for flips. Paper usually has sulfur in it and sulfur tones silver.&nbsp; Many of us like our silver coins with a little toning, but I can personally testify toning can continue toward black and go too far. Therefore, you should use &quot;sulfur-free&quot; paper for your flip inserts.[/QUOTE]</p><p><br /></p>

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