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 Replies: 13 / Views: 3,258 |
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Valued Member
Canada
497 Posts |
Just got my order of F15 Kangaroos and one has a large milk spot on the reverse,  Will soaking it in acetone remove the spot ? |
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Pillar of the Community
Canada
1502 Posts |
nope
the only thing that will is soft white rubber erasers. BUT you run a BIG RISK for scratching up the coin.
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Rest in Peace
United States
9104 Posts |
Acetone won't touch it. Verdi-care might.
Return for replacement, or put it out with some chocolate chip cookies for Santa.
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Pillar of the Community
Canada
1502 Posts |
Verdi-care won't either. The milk spots are notoriously hard to remove.
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Pillar of the Community
United States
4008 Posts |
I'm curious about these "milk spots" on coins. I once read that some silver Maple Leaf coins have this problem once in a while but they did not mention what causes them to appear. I was thinking that if this is due to some light metal impurity, soaking the coins in vinegar for a few hours might remove the spots. Most of the light metals, such as sodium, calcium, and magnesium will dissolve in dilute aqueous acetic acid. If these spots are not caused by impurities, does anyone know what does cause them?
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Valued Member
 Canada
497 Posts |
I understand they are residue from a blank planchet wash and if the wash is not changed often enough this is what occurs.The following youtube video has some info and says they are borax and can be removed by rubbing cloudy ammonia (ammonium hydroxide) on the spot, but I don't want to rub the coin in case it scratches it. Pretty poor quality control on the Perth Mint's part to let this slip by. http://www.youtube.com/watch?v=7sJS...tch_response |
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Bedrock of the Community
Australia
21786 Posts |
If you bought it in person take it back for refund. Alternatively take it back and ask for a small reduction in price. If it was shipped, photograph it and negotiate.
Either way, it may be difficult to prove the blemish is a liability of the supplier, and depends on the business good will of the supplier.
Don't clean it if you choose to take it back.
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Pillar of the Community
Canada
1502 Posts |
a LOT of maple leafs have this problem, basically all the pure silver RCM issue 9999 coins have the potential to develop these white spots. I found that they will develop over time, and can be caused by handling with bare hands (i have a few coins with my fingerprints in that odd milky white on them). The RCM (if that's where you bought them from) do take returns with no questions asked. You'll be out the return shipping fee but at least recover the $100. |
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Pillar of the Community
United States
4008 Posts |
Nice You Tube video, West-Canuk. Thanks for posting that info. If any of my Maple Leaf coins show these milk spots at any point, I will try an ammonia soak without rubbing to see how that does at removing them. These are all bullion coins, so no numismatic value at all to be lost via cleaning. I noticed that the official symbol of Canada was on some of those coins while the unofficial symbol of the US was on some of the silver rounds. It too was a plant leaf.  |
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Valued Member
Canada
497 Posts |
Quote:
the unofficial symbol of the US was on some of the silver rounds. It too was a plant leaf  Yes I noticed that and thought I should take any advice from the vidi with a grain of salt, think I will pursue the return to shipper option, but I may try the ammonia hydroxide or acetic acid on a maple to see how it turns out. I have a few with milk spots to try it on ( doesn't say much for RCM quality control either). |
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Rest in Peace
United States
9104 Posts |
QC on a piece of bullion = weight and fineness. If these are not affected by white spots, they are not important to QC.
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Pillar of the Community
Canada
1502 Posts |
QC =?
The official line is that the white spots (or scratches, toning, dents, etc.) don't affect the value of bullion any. But, fact is, when you have a choice of buyer a shiny new silver round versus a "tainted" one, 99% of the buyers would pay an extra buck for the spotless one.
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Rest in Peace
United States
9104 Posts |
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Pillar of the Community
United States
4008 Posts |
I agree, Poboxw. When I am shopping for coins, I like the shiny ones the best and will pay a little extra for them. A coin with a white spot on it would not look as nice to me and probably would not end up in my collection. While I do collect bullion coins, rounds, and bars, I still want them to LOOK NICE while they are being bullion. |
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Replies: 13 / Views: 3,258 |
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Posted 12/10/2011 2:21 pm
