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Message:: [QUOTE="WingedLiberty, post: 2122986, member: 26030"]Just wanted to mention something. I think that dipping a coin in a coin dip is about as "artificial" as you can get.  And dipped (white silver) coins are all over the place. In the 1960's when I cut my teeth as a coin collector, the rage was "Brilliant Uncirculated" or BU.  Those coins would get a premium.  This let to massive numbers of coins being dipped to bright white (for silver). I think dipping copper is even more problematic, however David Q Bowers mentioned in his book on Lincoln Cents that there are no (or at least very few) original RED (RD) Matte Proof Lincoln cents (1909-1916) -- that almost all the ones that are slabbed RD today were dipped to get them that way.  He said that "original" and "un-messed with" Matte Proof Lincolns tone a beautiful chocolate brown (or a mixed Red and Brown (RB) and many have brilliant colors from the sulfur tissue paper that the U.S. Mint wrapped those coins in when shipping out.  So in this case, you want chocolate brown copper with rainbow colors to show "originality". Maybe in addition to the term "AT" for Artificial Toning ... we need to add a new term to our nomenclature "AD" for Artificial Dipping.[/QUOTE]