Posted 05/18/2016 12:13 pm
I had a recent conversation with John at CAC about dipping. In the 40's and 50's many coins were dipped and a lot of these coins have retoned. For example, a rainbow XF 45 one must assume that it was dipped because of the past practice of dipping. It is possible for a lustrous XF to tone rainbow without being dipped. Unless you know the history of a coin, your often making an educated guess about dipping. He also said that he could take a roll of uncirculated Franklin's and dip half the coins and the so called dipping experts could not tell the dipped coins from the coins that were not dipped.
