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 Replies: 56 / Views: 22,755 |
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Bedrock of the Community
United States
19969 Posts |
Quote:
Yeah, like that, but I want to hear what Thad thinks of the specific usage. VC contains a strong, anti-corrosion package so it's quite suitable. |
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Moderator
 United States
23522 Posts |
I figured as much, but wanted to hear it from you. How about silver?
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Bedrock of the Community
United States
19969 Posts |
Quote:
How about silver? The anti-corrosion package works on ALL metals. |
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Pillar of the Community
 Canada
2805 Posts |
Today I tried it on two older silver coins. The results are interesting.   Hungary, 20 krajczar, 1837 - a cleaned and blotchy coin to begin with, but I love the design so much. It cost me $10. Anyway... You can see that this is a cleaned coin, but before it was ultrasoniced, the cleaning was much better-hidden by surface buildup of dirt. However, the cleaning also removed the white grime in the letters, so I'm still happy.   Latvia, 1 lats, 1924. I was very surprised - I wasn't expecting this coin's colour to be almost entirely from dirt. As a result, it now looks cleaned in some way, but it doesn't like a conventional "cleaned coin" either. Still, I'm a young guy and I have confidence that in my lifetime, this will re-tone and look better than it did before. So, these are not as obviously improved. Edited by nalaberong
01/15/2015 11:14 pm
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Pillar of the Community
United States
624 Posts |
How much variability are you introducing... Are you varying the cleaning solution, or the concentration? I get much different results from different cleaning products with my 2.5 liter ultrasonic cleaner. I use it for gun parts, but have found that a concentrated degreasing citrus cleaning solution cleans less effectively than a tablespoon of ordinary Dawn dish detergent.
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New Member
United States
25 Posts |
I have a few zinc coins that could use a bath like this, but they would need protecting after to prevent re-corrosion by white stuff. Would verdi care do that protecting, or would it seal the moisture in? The coins in particular would be old (WWI-WWII) Belgium and German coins, the ones that look and feel a little porous.
nalaberong, do you have any of those? They usually corrode white. I would think an ultrasonic bath would help that quite a bit but would worry about the water speeding up re-corrosion since they are zinc.
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Pillar of the Community
United States
8904 Posts |
Nalaberong! I'm digging how you posted the before and after pictures! NICE!
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Bedrock of the Community
United States
19969 Posts |
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Would Verdi Care do that protecting, or would it seal the moisture in? VC contains an anti-corrosion package that works with ALL metals. Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Moderator
United States
189673 Posts |
VERDI-CAREâ„¢ is not something that BadThad just "threw together" one day. He put a lot of R&D into it to get it right. You can get some history of its development in this thread... https://goccf.com/t/62434You can also learn about the previous product, VERDI-GONEâ„¢, in this thread... https://goccf.com/t/33105Both threads are worthwhile reads. Many questions will be answered for those who do not know much about these products. Of course, even if you still have questions, I am sure BadThad will be happy to answer them. |
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Bedrock of the Community
Australia
21788 Posts |
After the good treatments such as those mentioned here, for ongoing positive protection,
has anybody considered the use of clear spray acryllic laquer?
I have seen this stuff used on a blast white '64 half dollar way back in the year the coin was minted. The product that was used at the time was for artwork, to prevent the dusting of pencil drawings. The coin currently looks exactly the same as it did 50 years ago.
The laquer itself can still be removed very easily with acetone.
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Valued Member
United States
143 Posts |
That's a really interesting idea, Sel, assuming the laquer is inert, and really would easily come off with acetone. You could preserve your best coins indefinitely.
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Moderator
United States
23522 Posts |
In the Nineteenth Century, lacquer was the accepted treatment for preserving copper coins. You will find early American copper lacquered so commonly it needs to be factored into the evaluation of sales images; it'll make a righteous coin appear polished.
I'd do it today to preserve a coin, with original organic lacquer. Acetone removes it completely, without trace.
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Pillar of the Community
United States
624 Posts |
It would be VERY interesting to see if American Silver Eagles would develop that nasty 'spotting' under a coat of natural lacquer...?
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Moderator
United States
23522 Posts |
Oooooh. I like your thinking.
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Pillar of the Community
Canada
2805 Posts |
Today I got another batch of world coins, which means a few new test subjects too. I'll start with the best success story:   Qatar and Dubai was a short-lived rearrangement; the states of the Persian/Arabian Gulf seem to have been constantly conglomerating and separating. Ultimately, Qatar became its own country and Dubai joined the UAE. As a result, Qatar and Dubai are fairly dear to OFEC collectors, so I was hoping that this spare would clean up nicely. It did!  This rare Seychelles issue didn't finish up as nicely as I would have liked, but it's still an improvement.  From East Africa, another ugly copper coin that cleaned up fairly well. Notice the newly exposed bright spots, though.  This Argentine coin had the large, obvious deposits on it removed excellently.  The white residue on this Jersey penny was also removed cleanly.  Meanwhile, this Soviet coin shows the effect the ultrasonic cleaner has on slightly dirty copper-nickel. It just got subtly less grimy all around, with the obvious green patches reduced. |
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Replies: 56 / Views: 22,755 |
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Posted 01/09/2015 09:56 am
