Quote:
The chemicals used in leather production vary from time to time, and place to place; they include urine, various sorts of biologically active sludge (such as animal dung or abbatoir by-products), alkaline lime paste, salt, sulfuric acid, and chromium sulfate solution. Any one of which could cause problems for coins stored in them.
Post of the year? lol If only I went to a coin show and all the numisnerds were this much fun to talk to.