Milk Spots on coins...

SemperFI

Where do the milk spots on proof coins come from? Does anyone have any experience getting milk spots off of proof coins? I did try a dip on a test coin, a 1961 PCGS PR65 Franklin Half. The coin did lose the heavy green milk spots but some remnants of the spots are still there. Do these milk spots eat the surface of the coin?

Should I try MS70 on the affected area? I never used MS70 but I did buy some. Are you really supposed to just soak the coin or affect area of the coin in MS70 like the directions say?

Also to add, I am not a coin doctor nor am I a destroyer of coins. I just want my nice proof coins to look proof and not spotted by some US Mint Snot.

Placid

Russ told me ncs can't even totally remove them. I think they come from a rinse solution at the mint.

merz2

Semprfi
Placid is quite right.Those pesky milk spots are caused by the Mint.They do not properly rinse the coin before packageing.I haven't seen anyone that could remove them completely.

keets

........more correctly the planchets weren't rinsed properly before striking. as a result, the residue is struck into the planchet which results in the milkspot. some are big and some are small, but all are essentially a part of the coin.

al h.

MAULUMALL

Keets,How does it affect the grade.
Is it a major hit.

snake

I had some of these coins last year.All I did was contact the Co. that graded them and they ask that I return them and they would take care of them.In about 3 weeks I had beautful coin ,no spots.Hope this helps.Snake--MOS 145--Combat Inf--Korea

pontiacinf

I believe it or not, have had no problem using ms70 to remove this pesky afterwask solution of ivory soap.

coinrookie

Keets is right on the money. This was a bad problem on 50 and 60 proof coins. The planchets were washed with a soapy solution and not rinsed properly. Later an acid dip was used to get rid of the soapy solution and stoppped most of this problem. The problem is that this is actually struck into the coin. They range in size from a pin point to about half an inch. While sometimes they can be cleaned up quite a bit it is extremely hard to remove all traces of them If the coin is valuable, I would let NCS look at it.
Steve

Russ

<< <i>They range in size from a pin point to about half an inch. >>



The worst ones are those covered with the "pin point" spots. NCS can frequently dramatically reduce a single large spot or two, but they'll body bag the ones with dozens of tiny little spots.

Russ, NCNE