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  2. Coin cleaning - Wikipedia

    en.wikipedia.org/wiki/Coin_cleaning

    Coin cleaning is the controversial process of removing undesirable substances from a coin's surface in order to make it more attractive to potential buyers. The subject is disputed among the numismatic community whether cleaning coins is necessary. Those that argue in favor of cleaning are also in dispute on which methods work best.

  3. Should You Melt Down Pennies for Profit? Not U.S. Pennies ...

    www.aol.com/news/2012-05-11-should-you-melt-down...

    A penny, on its face, is worth one cent. $0.01 U.S. dollars. On the other hand, that same penny -- if melted down for the copper it contains -- could be worth quite a bit more.

  4. Glossary of numismatics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_numismatics

    This "cleanliness" is a result of the surface of the coin being dissolved by the acid. Dipped coins almost always have a lower numismatic value than when they were in their former "dirty" state, hence most numismatists do not recommend dipping or any other method of cleaning coins as doing so will likely reduce the coin's value. Double Eagle (U ...

  5. Ultrasonic cleaning - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_cleaning

    Ultrasonic cleaning is a process ... destroying and separating the dirty adsorption on the surface of the object. ... dental and surgical instruments, tools, coins ...

  6. Family finds 1 million pennies cleaning out home. Now ... - AOL

    www.aol.com/family-finds-1-million-pennies...

    ‘Many of these bags are actually sealed, they’re lead sealed directly from the bank’

  7. 6 Pennies from the 1900s Worth a Lot of Money - AOL

    www.aol.com/6-pennies-1900s-worth-lot-170027031.html

    The 1944-D Lincoln penny is also referred to as steel pennies or silver pennies. In 1944, pennies were supposed to transition from steal back to copper. These pennies were mistakenly minted using ...

  8. Georgia man who was paid in 91,000 greasy pennies saved ... - AOL

    www.aol.com/news/georgia-man-paid-91-000...

    Andreas Flaten, last seen scrubbing 91,000 pennies in his garage after receiving them as a final 'paycheck' from a former employer, is now in possession of $1,000 in cash thanks to Coinstar, a ...

  9. Coin counterfeiting - Wikipedia

    en.wikipedia.org/wiki/Coin_counterfeiting

    A real British pound coin, of the old type, on top of a fake.This coin was often counterfeited. Defective milling and letters on a counterfeit coin (top) For modern coins in general circulation, the most common method of protection from forgeries is the use of bi-metallic coins made of two metals of different color, which are difficult to counterfeit at low cost.

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