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 Replies: 8 / Views: 2,219 |
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Valued Member
United States
87 Posts |
Hello everyone,
Please, this is not a question about cleaning. Yes, I have read some of the 'historical' forum topics on MS70 but didn't come across one that gave an opinion based on experience for long term results. If I missed it, please point me in that direction. (no need to waste anyone's time with repeat information...)
I have quite a few 7 piece sets of the 1982 small/large date & zinc/copper pennies. I wanted to put them in holders but some of them are pretty dark. I have had good success using the MS70 on some extra nickel proofs but am weary of using on copper and zinc. BTW, I would rinse in acetone.
Question:
Has anyone used MS70 on copper pennies and or zinc pennies and then looked at them several years down the road? If so, how much toning happened?
Did the brightener actually bring some of the red luster back to the pennies? and if so, was the effect permanent?
When answering, please identify if the coins you used the brightener on was the copper or zincolns?
I appreciate all the experience everyone shares! You guys rock!
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Pillar of the Community
United States
4212 Posts |
http://goccf.com/t/74826This may help some. About 15 yrs. ago, I gave a review of this product, with many before & afters. The site has since changed hands & I cant seem to find it. From my understanding, the formula has definitely changed since then. I showed-off a '43 farthing my dad used it on & it had wild blue & red toning. (doctoring) This happened over several decades. This is when the product 1st came out & the results were unintentional. Heck, dad wanted everything blast-white. I haven't touched the stuff in over a decade, if that.
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Valued Member
 United States
87 Posts |
Thank you fioti for responding. The link you gave is one of the topics that I had read. Even it is 7 years old. So I was looking for something that was long term and or newer. I appreciate your time! I will look for a before and after review. Maybe the review you gave is still out there somewhere... It would be interesting to see the toning.
When does "toning" become "doctoring"?
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Bedrock of the Community
United States
17884 Posts |
A quetio with an indeterminant answer. If a copper coin is cleaned with MS70 and later tones, did ittone becauseof exposure to the MS70, did it tone because the MS70 was not completely rinsed away and reacted withthe metal over time, or did it tone because the MS70 left the coin with exposed bare metal, and copper being very reactive it toned due to exposure to chemicals in the environment? All you know is that it was exposed to MS70 at one time. You have no idea what actually caused the toning.
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Valued Member
United States
87 Posts |
Condor and others,
Hmmmmm. If I used the MS70, rinse with acetone, dry carefully, seal in cardboard 2X2, that should take any extra possibility out of toning? When does toning become doctoring? And can a grader distinguish from toning and doctoring? Or isn't doctoring and toning the same thing?
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Pillar of the Community
United States
5854 Posts |
There are threads on some of the other forums where people tested MS70 on some inexpensive copper coins. Some coins acquired wild purple and blue toning, others had some of the patina stripped a little, and some didn't seem to have any effect. Quote:
When does "toning" become "doctoring"? When the market thinks it is doctored. I know it is not a very helpful answer but there are coins that are artificially toned but the toning looks natural enough that it is bought and sold as if the toning were natural and vice versa. |
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Bedrock of the Community
United States
94367 Posts |
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Bedrock of the Community
13014 Posts |
There are a couple threads on the CU forum right now that are very relevant to this topic, one was started by Rick Snow as well
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Bedrock of the Community
United States
17884 Posts |
Quote:
Hmmmmm. If I used the MS70, rinse with acetone, dry carefully, seal in cardboard 2X2, that should take any extra possibility out of toning? 1. I don't know if acetone will actually rinse away everything in MS70. A through rinse with distilled water (a flowing rinse, not a dunk.) first might be a better idea. 2. After the distilled water rinse, a flowing rinse with acetone to remove the water. And after an acetone rinse you don't need to dry the coin the acetone will evaporate away in seconds. 3. The 2X2 will help keep atmospheric contaminats away, but the 2X2's a re NOT airtight and and the storage environment may still result in toning if it isn't dry, a constant moderate temperature, and not exposed to other atmospheric chemicals. Low humidity is a real key to holding off toning. Most toning is the result of oxidation-reduction reactions and those REQUIRE water in order to proceed. And they can use water vapor right out of the air. Toning is pretty much impossible to stop but it can be slowed to a very great extent just by keeping the humidity low. |
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Replies: 8 / Views: 2,219 |
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Posted 03/24/2017 11:08 am
