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<p>[QUOTE=&quot;Just Carl, post: 341395, member: 4552&quot;]Exactly and I&#039;m sure one of the guilty individuals. As a Chem teacher in a Juniour College not long ago I used coins as experimentations for the classes. Coins in the past have been dipped or dissolved in practically every Acid at our disposal. Coins have been attempted to be cleaned as a household experiment with anything found around a house. Such items were Lemon Juices, Orange juices, Tomato sauces and juices, Vinegar, common table salt, pepers, tap water, battery acids and on and on and on. I always stressed not to use any coins that may be valuable but that is sort of like saying to someone under age not to drink Alcohol. In addtion to that I would expect that probably 90% of every chem class student on Earthy has done something to coins. And exactly what is pending on what chemicals are available. </p><p>Why it is absolutely fantastic what a dissolved Copper Cent in Sulfuric Acid produces. After it is dissolved the Blue/Green solution is filtered and left to evaporate at a controled rate and produces a fantastic crustal.[/QUOTE]</p><p><br /></p>

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