ricos
- DIY
GRAY MATTERPretty Penny
Looking for something more interesting to do with that jar of pennies than just cash it in? One word: acid.
In most years before 1982, American pennies were 95 percent copper. Then the price of copper went up until you could get $100 worth of pennies at the bank, melt them down, and sell the metal for more than $100. So the government started using a core of cheap zinc with only a thin plating of copper.
10.20.2008 at 10:29am - Comment by ricosNice copper sink... great post and nice experiment.. by Copper Sinks
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December 2009: Best of What's New
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