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 Replies: 199 / Views: 35,956 |
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Pillar of the Community
United States
5318 Posts |
Somehow I've missed the progress on this thread, but judging by the recent before/after photos, it sure looks like you've fixed those earlier issues.  The results on the large cent are great!--the color appears natural to me. So here's a question--do you think a coin conserved with your final product would slab by a TPG? Wouldn't that be nice. |
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Bedrock of the Community
 United States
19963 Posts |
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NLP Don't worry about the instructions. I think this being a chemist is a second career for Thad I'm sure from the instructions he sent that in his former life he was either a lawyer or wrote instruction manuals for the IRS. :) As a tester I will give the short form instructions here condensed down from 12 pages. Cover coin with Verdi Gone in sealed glass container. Let soak. When solution turns blue replace. When Verdi is gone rinse with distilled water ( I cheated I used tap water) and let dry.
Now the disclaimer. Please read all the instructions before using. I will not be held responsible for those of you that try to use this for contact solution or to remove that yellow stain from your toe nails.
Sam....thanks for the laugh!  Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Bedrock of the Community
United States
19963 Posts |
Quote:So here's a question--do you think a coin conserved with your final product would slab by a TPG? Wouldn't that be nice. Excellent question! I would have to say that depends on many factors. VERDI-GONE™ is not a "miracle" product. If a coin is severely corroded, there's no way it can be conserved. Also, if VERDI-GONE™ is used improperly, the surface can be obviously altered. With that said, I have personally tested VERDI-GONE™ on many coins with excellent success, ..... to the point where I could not tell the coin had been conserved. I think Sam's large cent is a very good example. With a good specimen/conservation candidate, great care and minimal exposure to VERDI-GONE™, the conservation process can be undetectable. I'll offer this. The first person to use VERDI-GONE™, receive back a sucessful major TGP grade, and provide photographic proof of each step.....I'll award a very special prize!  |
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Pillar of the Community
United States
2669 Posts |
BadThad.. all I can say is 'wow'! I can't wait for it to hit the market!  Quick question(s) for you.. that doo-hickey you referred to earlier that you check things on at work - you can check at the microscopic layer to verify all green meanies are indeed gone? And... how do you think this might do with bronze disease? |
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Bedrock of the Community
United States
19963 Posts |
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Quick question(s) for you.. that doo-hickey you referred to earlier that you check things on at work - you can check at the microscopic layer to verify all green meanies are indeed gone?
And... how do you think this might do with bronze disease? That would be the SEM-EDXRF (Scanning Electron Microscope), yes, I have checked one coin and I found no trace of verdigris. I have no idea how it works on bronze disease, VERDI-GONE™ has not be validated for that use. However, from what I've read, it should work at removing it from the surface. I look foward to somebody testing it at some point. Sadly, from my readings, the surface is usually damaged so removing the bronze verdigris may just expose the pits already present. |
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Pillar of the Community
United States
2669 Posts |
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Sadly, from my readings, the surface is usually damaged so removing the bronze verdigris may just expose the pits already present. Well, no matter which way it's taken off, the pits would still be there. And it has to come off or it will just spread. Remember my poor Australian half penny? I haven't yet had time to try anything on it since we just returned from our trip, and am more than willing to use it as a test specimen for bronze disease removal. In any case, it's exceedingly cool to have been able to watch (err.. read) the progression of your cleaner/conserver. |
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Bedrock of the Community
United States
20753 Posts |
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As for the second question, I theorize that the areas that form verdigris have less oxidation. Bare copper in it's pure form is very, very reactive. When it's oxidized, it's somewhat protected from forming verdigris.
Thad don't forget that as coins or anything Copper are handled they accumulate oils that retard forming of compounds. Enough human body oils actually act as a protective shield. |
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Bedrock of the Community
United States
20753 Posts |
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And... how do you think this might do with bronze disease?
A problem doing anything with Bronze is no knowing the exact mixture of the Bronze. Unlike Copper or Brass which is fairly steady mixture of Copper, Tin and Zinc, Bronze is mixture that if very inconsistant. Bronze is also basically Copper but is also mixed with Tin, Phosphorus, Manganese, Aluminum, Silicon and numerous other elements and of various different percentages. Bronze is made with so many different substances in order to produce different appearances, rigidity and longevity. Bronze Cents made from shell casings after the WW2 were supposed to be a consistant material but since there is little consistancy in those shells, even that is ambiguous. |
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Bedrock of the Community
United States
19963 Posts |
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Thad don't forget that as coins or anything Copper are handled they accumulate oils that retard forming of compounds. Enough human body oils actually act as a protective shield.
Indeed. VERDI-GONE™ has a minimal effect on these, they strongly contribute to the patina. |
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Bedrock of the Community
United States
19963 Posts |
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
United States
1231 Posts |
Very impressive results Thad!
Does your product have a shelf-life? Would it still have the same effectiveness if the same bottle was used a year later?
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Bedrock of the Community
United States
19963 Posts |
Stability testing is underway. I recommend using the product within six months for now.
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
United States
860 Posts |
Thad,
Have any of the cents you have tested have the dark carbon spots as well as the verdigris? If so, how did they react if at all? Thanks.
Jim
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Bedrock of the Community
United States
19963 Posts |
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Have any of the cents you have tested have the dark carbon spots as well as the verdigris? If so, how did they react if at all? Thanks.
Yes. VERDI-GONE™ will not remove organic residues such as carbon spots. Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Rest in Peace
United States
9104 Posts |
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The Large Cent soaked for about 3 hours and I liked the overall outcome on this coin the best of any I did. Suppose that might be because the large cent was copper? |
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Replies: 199 / Views: 35,956 |
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Posted 07/17/2008 5:58 pm
