Opinion question: Would acid dipping a good coin cause it to lose half or more of its' thickness from the inside, leaving both sides with clear relief with no distortion?
This can happen with a clad coin in acid or in a chlorine pool for a while. In a pool the entire core can vanish.
True.. I was thinking that it would not be possible on a Cent or Nickel. Because if you read the question the OP is asking half or more of its thickness from the inside. It's a weird question.
what kind of acid? muriatic nitric hydrochloric plus, one doesn't have to "dip" the entire coin .. one could apply it to only certain locations, thus not affect other locations. Don't forget to include in your thinking if a coin was dropped/covered up/buried in acidic dirt ...
Thank you all for the interesting responses. Sorry it took so long to post the photos. Here they are...
Acid soaked coin. Note the reduced diameter. Also on a rolled thin planchet of half the weight the designs (Jefferson and Monticello) would not be struck up anywhere near that well and Monticello would have little or no internal detail. It does on your coin. on a rolled thin planchet the diameter would also be normal.
