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 Replies: 28 / Views: 1,415 |
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Pillar of the Community
United States
2266 Posts |
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Looking forward to before and after pictures! 
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Pillar of the Community
United States
3146 Posts |
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PROPER use of MS70 that would work as well.
"Nummi rari mira sunt, si sumptus ferre potes." - Christophorus filius Scotiae
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Moderator
  United States
72196 Posts |
thanks all - I'll be on the search for low quality Cu-Ni coins to use as a 'sacrificial lamb' first.
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Moderator
United States
164459 Posts |
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I'll be on the search for low quality Cu-Ni coins to use as a 'sacrificial lamb' first. 
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Pillar of the Community
 United States
4541 Posts |
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The MSDS lists sulfuric acid: 1-5% and thiourea: 3-7%. Absolutely do NOT use this CORROSIVE concoction!
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Moderator
Australia
16345 Posts |
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thanks all - I'll be on the search for low quality Cu-Ni coins to use as a 'sacrificial lamb' first. Or just grab some surplus US nickels from pocket change - they're made of the same alloy. I would concur that e-Z-est ought not to be used on base-metal coins. The sulfuric acid will simply eat away and pit everything base-metal. Sufuric acid/thiourea mixture is intended for tarnish removal of silver. I'm not entirely sure that anything will have a good chance of working; it depends on what exactly has caused the hazing. If whatever-it-is has etched into the metal, then the damage is done and nothing is likely to actually make an improvement. Can't say I've tried soapy ammonia, though.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Bedrock of the Community
United States
18751 Posts |
Sudsy ammonia: "can also be made at home by adding a couple of tablespoons of liquid dish soap to a half gallon container of ammonia". And a half gallon container of ammonia is exactly what I picked up earlier at Dollar Tree for $1.25.
Inordinately fascinated by bits of metal with strange markings and figures
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Moderator
United States
72196 Posts |
thanks Hondo - I'll mix up some of that - I'm pretty sure that Dawn dish soap has no bleach in it. (they us it on wildlife after all) Quote:
Or just grab some surplus US nickels from pocket change - they're made of the same alloy. That was my plan - I have tons of unrolled (and unsearched) nickels. I'll use them (after a quick search for DDO / DDR and other stuff first, of course) |
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Bedrock of the Community
United States
18751 Posts |
I mixed up a small batch of sudsy ammonia - about 100 mls of Dollar Tree ammonia plus 1 drop Dawn. I soaked and swirled a British Virgin Islands 10 Cents 1975 in it for about 30 seconds but there was minimal effect. I'll try a longer soak later. edit: the color difference is probably due to lighting. British Virgin Islands 10 Cents 1975 Before ammonia  British Virgin Islands 10 Cents 1975 Post ammonia  Inordinately fascinated by bits of metal with strange markings and figures
Edited by Hondo Boguss
12/20/2024 11:08 am
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Pillar of the Community
United States
6126 Posts |
Dare I say...looks more pronounced now.
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Bedrock of the Community
United States
18751 Posts |
That may be an artifact of lighting. The fogginess has not been affected much.
Inordinately fascinated by bits of metal with strange markings and figures
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Moderator
United States
164459 Posts |
Does not seem worth the effort, but still a good experiment.
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Pillar of the Community
United States
4541 Posts |
The coin looks good as it is. Not sure why the need for experimentation.
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Bedrock of the Community
United States
18751 Posts |
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Not sure why the need for experimentation. This coin isn't especially foggy, but was an expendable CuNi proof. I have others that are quite foggy, to the point of being very unattractive. It would be nice if they could be treated.
Inordinately fascinated by bits of metal with strange markings and figures
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Moderator
United States
164459 Posts |
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This coin isn't especially foggy, but was an expendable CuNi proof. I have others that are quite foggy, to the point of being very unattractive. It would be nice if they could be treated. 
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Replies: 28 / Views: 1,415 |
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First Page
Posted 12/19/2024 3:40 pm
