Red Marks On Saint - Coin Community Forum

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Author	Replies: 8 / Views: 1,032
TSmith3510 Valued Member United States 455 Posts	Posted 12/15/2006 11:19 am Hey guys, I noticed some red marks on one of my double eagles. I'm not sure what they are or how they got there. If there's a safe way to clean up the piece I would like to. Any ideas? Image Insert: [/size=1 Image Insert: [size=1] Edited by TSmith3510 12/15/2006 11:25 am Report this Post to the Staff

biokemist6 Bedrock of the Community United States 12437 Posts	Posted 12/15/2006 11:23 am Your links are not working. Edit: Ok I see pics now. Looks like copper spots from improper alloy mixing. Edited by biokemist6 12/15/2006 11:26 am Report this Post to the Staff
ageka Pillar of the Community Belgium 2078 Posts	Posted 12/15/2006 12:51 pm These marks normally only appear on 999 pure coins that use modern production runs of planchets where quality control is poor and the previous run of planchets was silver planchets The silver oxidises and the normal black gets to be red on the gold background ( seen in many modern german coins; french coins and pandas) This according to the analyses of a German University Ag (84%); Cu (10%); Au (5%)]. http://www.emuenzen.de/forum/euromu...muenzen.html The treatment is dangerous and harsh This source may be wrong in its explanation since the German source had access to a fully equipped university laboratory But it is the only cure I have seen sofar http://www.taxfreegold.co.uk/redspo...ldcoins.html Report this Post to the Staff
TSmith3510 Valued Member United States 455 Posts	Posted 12/15/2006 1:14 pm Ageka,I agree the procedure sounds too dangerous and I wouldn't try it. I think it's a job for a professional chemist with access to a laboratory. It's unfortunate the coin can't be fixed with a "quick dip" or something along those lines. I think the marks diminish the coin's appeal and probably it's value also, do you agree? I have other Saints that appear to be problem free, do you think it's possible they may develop copper spots? I appreciate your feedback. Report this Post to the Staff
Bryan1315 Bedrock of the Community United States 14454 Posts	Posted 12/15/2006 2:32 pm sure would look good in my Dansco!!! even though I can't see the date very clearly I still like it myself Edited by Bryan1315 12/15/2006 2:34 pm Report this Post to the Staff
TSmith3510 Valued Member United States 455 Posts	Posted 12/15/2006 3:23 pm Bryan, I guess the photo is not too clear, but it's a 1923. This was my first attempt at coin photography and it took multiple attempts before I had anything suitable to post. I didn't even know my camera had a close up option, I discovered it through this process. Getting the lighting right was tricky too. I think I've gotten the hang of it now, I'll just have practice a bit. Report this Post to the Staff
Guido Valued Member United States 390 Posts	Posted 12/15/2006 4:13 pm Maybe NCS could restore it for you. It doesn't look like it's slabbed, so that might be an idea. I don't know what they would say or do, though. Report this Post to the Staff
longnine009 Pillar of the Community United States 1247 Posts	Posted 12/15/2006 5:42 pm It looks like copper spotting to me--bad alloy mix. Report this Post to the Staff
ageka Pillar of the Community Belgium 2078 Posts	Posted 12/16/2006 05:46 am quote: Originally posted by TSmith3510 Ageka,I agree the procedure sounds too dangerous and I wouldn't try it. I think it's a job for a professional chemist with access to a laboratory. It's unfortunate the coin can't be fixed with a "quick dip" or something along those lines. I think the marks diminish the coin's appeal and probably it's value also, do you agree? I have other Saints that appear to be problem free, do you think it's possible they may develop copper spots? I appreciate your feedback. I think the price is reduced by the spots because if it is silversulfide more spots may develop on that one single coin I tried about 15 solvents on red spots and no solvent even diminished the spotting . I quit at that moment allthough I believe a silver dip may work but would leave a tell tale mark on the surface . On the other hand my friend who has been dipping all his life tells me the copper in the Saints makes it retone after a few years back to normal . I do not think that any coin older then 10 years will develop anything other then pvc plasticiser spots when left in the wrong holder So no I do not think your other coins will develop copper nor silver spots Report this Post to the Staff
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