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If Milk Doesn't Cause Milk Spots, What Does?
I've heard tales of cyanide and coins, but never milk and coins. What REALLY causes milk spots? -
Re: If Milk Doesn't Cause Milk Spots, What Does?
Although the substance is known, the real reward would lie in finding a method to remove the spots. Unfortunately, by the time they develop, the surface below is marred. A key step is dipping the coin in reagent grade acetone upon receipt and proper rinse and dry steps. This seems to prevent the development of the milk… -
Re: If Milk Doesn't Cause Milk Spots, What Does?
Cows. -
Re: If Milk Doesn't Cause Milk Spots, What Does?
The processes and materials used to "whiten" planchets before use has changed many times over the last century. Planchets for nickels have been purchased ready-to-use, from contractors since the 1880s, so blaming the mint for the color of 1912 coins is meaningless. -
Re: If Milk Doesn't Cause Milk Spots, What Does?
Ditto that, BF and all beat me to the punch... -
Re: If Milk Doesn't Cause Milk Spots, What Does?
<< <i>JMHO, but the term "Milkspot" as i understand it was originally used to denote spots on Proof coins which were the result of incomplete removal of the the rinsing agent used on planchets prior to striking. from that perspective, Milkspots are really a strike-through and have become a part of the coin's surface,… -
Re: If Milk Doesn't Cause Milk Spots, What Does?
Unfortunately the cleaning agents that the mints use for cleaning planchets seem to be the root of problem. It’s a shame that the mint can’t get this right on a consistent basis. The problem has been around for many years. Those who collect Liberty nickels know that the 1912 –S and D coins in uncleaned, Mint State… -
Re: If Milk Doesn't Cause Milk Spots, What Does?
JMHO, but the term "Milkspot" as i understand it was originally used to denote spots on Proof coins which were the result of incomplete removal of the the rinsing agent used on planchets prior to striking. from that perspective, Milkspots are really a strike-through and have become a part of the coin's surface, rendering… -
Re: If Milk Doesn't Cause Milk Spots, What Does?
Answer that and your a made man. -
Re: If Milk Doesn't Cause Milk Spots, What Does?
Yes, the principal culprit seems to be chlorine, possibly from some sort of bleaching step.
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