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<p>[QUOTE=&quot;desertgem, post: 1605200, member: 15199&quot;]Even though vinegar is usually about 5% acetic acid ( a weak acid in the chemical sense) , it is active enough to react with the coin metal. The effects are more damaging for copper than for silver ( since the silver doesn&#039;t show the obvious damaged color of acid treated copper. Many use Silver dip ( such as EZest) has strong acids in it to strip silver coins to produce the &quot;Blast white&quot; effect, while copper often produces the pumpkin orange effect which is undesirable.</p><p><br /></p><p>This includes, catsup, hot sauce, taco sauce, most of JACK&#039;S sauce, etc. which contains vinegar.[/QUOTE]</p><p><br /></p>

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