i received this from a wholesaler, and thought i would share. i'm going to start putting it on the bottom of all my invoices.
"RE: 100% solid sterling silver (0.925). When wrapping your items, do not place them directly in paper, cardboard, or cotton-filled boxes, as these contain trace elements of sulfur which will tarnish your silver jewelry. For best results, place the items in a sealed plastic bag or jeweler's sulfur-free tissue [different from standard tissue] prior to boxing and wrapping."
----------- @vicki [SnuggleWench] (Books)