How to dip copper coins?

so it passes muster with PCGS and NGC. Any ideas

 

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This is going to be fun

 

Lotsa luck

 

Don't they have some gadget that sniffs out residue on coins?

 

Stirring the pot I see. LOL

 

LOL, don't you know it!

Steve

 

Only one way - don't. Maybe you can get Doug or somebody else that insists it's done all the time to share their secret.

 

Every dealer in my area also says it happens on a regular

 

Lots of people say that it happens all of the time, yet nobody ever demonstrates it. Put up or shut up.

 

Reminds you of something, don't it...

 

You want to see what dip does to copper? OK.

Before. These were heavily overlit to expose any detail at all; the coin was almost black:





After. Mind, this set is scans, which do not show color with any effectiveness. You have no_idea how bright and putrid a color this coin became:





That was ten years ago, when I was first learning what you could and couldn't do to copper. The coin still hasn't recovered yet, although I probably could (now) if I set my mind to it.

If your definition of "dip" includes thiourea, just don't.

 

Unless you like pink copper !

 

I just go for broke. Like this:

(This method should only be done in the presence of a trained numismatist or livestock veterinarian)
1) Mix one part Koinsolv with three parts E-Z Est (the mixture will produce lots of smoke, so just remember to wear a hospital-grade respirator).
2) Dip for 2 minutes, stirring anti-clockwise (in the northern hemisphere).
3) Immediately bathe coin in MS70 for a few minutes.
4) Take it out of the bath and set coin on paper towel for 1 hour (you cannot skip this step!)
5) Do a final rinse in room-temp Faygo-brand soda. Any flavor will do, but don't go cheap and try it with some of that Coke or Pepsi crap from your fridge.
6) In a beaker, steep the coin in 160-degree distilled water, stir the water with a BPA-free plastic spoon, and chant the Frisian-language invocation, "Myn munt sil wêze rein". ...Yes, Frisian. Over and over. For 10 minutes.
7) Remove from water. Blow dry.

Before and After pic:


... there's a final step, but I forgot what it was. hmm.

??

 

Depends on what you mean by dip. Anything that you apply to the surface of a coin which alters the metal is not going to pass the TPGs. But there are chemicals like xylol and water which can be used to clean organic material off of coins and which will not necessary keep the coin from grading cleanly.

 

@mlov43, I can't tell whether you're yanking my chain or not. I know some (or a lot) is BS, but...

Steve

 

All we need are more people messing with coins.

 

The final step is owning up to the fact that the before/after are in correct order, left to right.

 

Yeh, saw that, but thought it would take more than his process to produce that (like ground burial).

Steve

 

Well, if the requirements for the presence of a trained numismatist OR livestock veterinarian and the importance of chanting in Frisian aren't enough to trigger your BS-detector, ...then get that thing fixed, man!


Oh! And I remember the final step now:

8) Throw the coin in the trash.

 

I've got a nasty gash in my cheek where the hook embedded itself.

Steve