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 Replies: 23 / Views: 10,760 |
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Pillar of the Community
Canada
6768 Posts |
I had Titanic Privy SML in the slab.
But still there were tiny milk spots on it.
Why "had" - I removed it from the slab and put in AirTite.
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Valued Member
Canada
85 Posts |
This might be a solution?  |
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Pillar of the Community
Canada
3733 Posts |
yes milk spots are ugly, but I don't think they affect grading. I am sure someone more experienced will get in on the discussion.
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Pillar of the Community
Canada
6768 Posts |
Painting? But this kind of "different" set. I believe, that gilded coins also will be OK...but it again different set. I have the coins (2011-2012 Wildlife, not the Antelope)that I removed by myself from Thermotron seal (by RCM) and put into Airtite capsules - so far no milk spots on them. |
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Valued Member
Canada
396 Posts |
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Pillar of the Community
United States
1391 Posts |
zzzhuge:  That is great! I had to laugh when I saw that. thehulk: The milk spots on my coins are usually small and circular. I haven't seen any like yours. I wonder if humidity helps to cause them. I have never had any develop milk spots in my possession, they have only come into my collection like that. I live where there is very, very low humidity. |
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New Member
Canada
13 Posts |
@ tocoins: Was gong to suggest that very same video too! Beat me to it. Also, like the video says, I've tried using eraser to get rid of the milk spots, but it was only so-so effective. I think he also has another video about how to remove tarnish quickly, and that was worked like a charm. For those who don't know yet (which I doubt), the way suggested was to soak the silver in a hot water with baking soda solution. Then place the silver on top of a piece of aluminium foil. You can wrap the foil around to hard to reach places on the surface of the coin/silverware as well.
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Valued Member
Canada
269 Posts |
That seems like a very peculiar method... does anyone know if it actually works?
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Valued Member
Canada
192 Posts |
Don't worry about milk mark seriously doesn't mater it's a norm
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Valued Member
Canada
96 Posts |
You can use a clean and very soft white eraser to clean the dirt if you wish. Don't do that to tiny milk spots though, I heard that cleaning would ruin numismatic value of a collectible coin.
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Valued Member
Canada
269 Posts |
I tried that once and it left tiny scratches on the surface of the coin.... still better then the look of milk spots though. The only reason that I don't do it is because I might end up selling it in the future and I don't want to accidently sell "cleaned" coins.
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Valued Member
Canada
96 Posts |
3 or 4 months ago I bought the grizzly coins, exactly look like thehulk's for 38.xx$ each from kitco (spot was 33~34$), cleaned the reverse gently with an eraser, the scratches resulted are barely noticeable. Not all the "spots" were removed because I did not overapply pressure.
I did that because I believed these coins already lost their original numismatic value. Before that I've even ruined a fine cougar using hot water + soap + vinegar combination, when I wiped the solution processed coin with lab wiping paper, the paper became black and the coin was left with heavy scratches. Then I applied some toothpaste on the same coin, no miracle happened but only worse. Because of that I gave up the soda boiling water + aluminum foil idea. On Youtube they used worn circulated silver coins if you have any it might worth a try.
Edited by loonar
02/24/2013 9:27 pm
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Pillar of the Community
Canada
815 Posts |
To chime in here, I have had problems with milk spotting, and as a result, I consider any and all RCM minted one ouncers to be strictly bullion if they are being bought for the long-term. I just cannot trust a mint that does not value quality control and quality in general with a numismatic investment. The wildlife series was what got me excited in Maple/ounce stacking, and I will buy a Wolf and Bison to complete my personal set, but I won't buy any more for more than S+$3, to flip/resell. For bullion coins, I am sticking to US Eagles going forward, and maybe Chinese Pandas if the mintages don't climb too high. |
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Pillar of the Community
Canada
815 Posts |
Also, for long-term investment now, I am buying certified 10+ ounce bars exclusively. They are easier to store in the safe deposit box, and sell at a very small premium over spot. maples are attractive for short-mid term profiteering on spot fluctuations, but they are horrible as an investment vehicle at anything more than S+$2, but that is just my opinion.
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New Member
Canada
13 Posts |
@ loonar: I think putting pure silver (99.99%) in vinegar solution is chemically not a good idea; vinegar is, after all, an acid. I think you only use vinegar solution to clean silver that's plated or an alloy (typically silver plated utensils or silver-copper jewelry). Baking soda and aluminium works because you're replacing the silver ion in tarnished silver with aluminium ions (see equation below).
3 Ag2S + 2 Al = 6 Ag + Al2S3
silver sulfide + aluminum = silver + aluminum sulfide
Anyway, that's my take of things, perhaps more qualified chemists out there can elaborate on this?
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Posted 02/22/2013 5:09 pm
