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 Replies: 199 / Views: 35,948 |
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Bedrock of the Community
 United States
19963 Posts |
Jim, there's also a link in my sig. hehehehehe
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Pillar of the Community
United States
5318 Posts |
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my 1909S VDB went into an NGC holder! Wow...congrats, what a vindication of all your hard work!  |
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Pillar of the Community
United States
2600 Posts |
Bad, can't find it on your website. will send a PM.
Jim
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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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Bedrock of the Community
United States
20753 Posts |
A dealer I know recently told me he has cleaned coins with actual jewlery cleaners and then used gun blueing on them. Then left them sat for a while in the sun, sent for grading and slabbing and about half were slabbed. The rest came back as cleaned. Naturally since all such cleaners are different and the same with gun blueing, it would be impossible to repeat this unless the same items were used. Also, it true. He also told me he has never been able to remove black spots on Silver coins.
I've been trying that for years also.
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Bedrock of the Community
United States
19963 Posts |
When VERDIGONE™ is used properly, this is what you can achieve. VERDIGONE™ treated 1909SVDB in NGC slab:    Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Moderator
 United States
189053 Posts |
Nice! |
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Rest in Peace
United States
9104 Posts |
So what actually has been proven (which I already knew) is that TPGs will grade cleaned coins. I know if I received a slobbed coin with streaks of discoloration, I wouldn't be happy.
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Bedrock of the Community
United States
19963 Posts |
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So what actually has been proven (which I already knew) is that TPGs will grade cleaned coins. I know if I received a slobbed coin with streaks of discoloration, I wouldn't be happy.
Why can't you admit you were wrong and that a properly conserved coin can be graded? I don't know what your problem is with me, but I don't care for your comments on any of my posts. I'd appreciate if you'd just read my threads, keep your comments to yourself and NOT post from now. Thank You |
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Bedrock of the Community
United States
19963 Posts |
Today I had to do some repair work on our SEM (Scanning Electron Microscope) so I thought I'd use a Zincoln with verdigris as a test object. This is the first time I've looked at verdigris on a Zincoln! Here's a snapshot of what I was looking at:  The verdigris appeared to have some blackish, organic material mixed in. Looking at the relative abundances of elements, I confirmed this due to the presence of carbon. I was surprized to also find fairly high amounts of sodium and chloride, which leaves me to believe the corrosion was catalyzed with good old table salt. There was also traces of potassium which is an impurity in salt (potassium chloride). Interestingly, there was almost no copper sulfate, the verdigris was mainly composed of copper/zinc chloride's and oxides. Just thought I'd share some science. Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Moderator
United States
189053 Posts |
That's pretty cool stuff there, BadThad! |
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Pillar of the Community
United States
860 Posts |
Thad, I suspect that that area was initialized by skin secretions such as sweat since as I interpret the graph, the potassium level would be much lower and the iodide component would be seen. The carbon, sodium, potassium, and chloride levels would be consistent with perspiration. Do you have a photo of the coin itself and the area sampled? Might be a fingerprint ridge origin.
Jim
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Rest in Peace
United States
9104 Posts |
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Why can't you admit you were wrong and that a properly conserved coin can be graded? At no point did I say your coins were improperly conserved or that they couldn't be graded. I said I would return a coin that had streaks of discoloration (clearly visible even on a monitor) that was graded as if it had an even-colored surface, even though it looks better than with the verdigris. Sorry you can't handle anyone having a differing opinion. |
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Pillar of the Community
United States
5318 Posts |
Fascinating analysis of a "Zincoln*" and I'm glad to see your 09-S VDB slabbed. *poor Mr. Lincoln, I suppose he'd laugh... |
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Bedrock of the Community
United States
19963 Posts |
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Thad, I suspect that that area was initialized by skin secretions such as sweat since as I interpret the graph, the potassium level would be much lower and the iodide component would be seen. The carbon, sodium, potassium, and chloride levels would be consistent with perspiration. Do you have a photo of the coin itself and the area sampled? Might be a fingerprint ridge origin.
Excellent theory! No pictures of the coin, just a quick SEM-XRF analysis for fun. |
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Replies: 199 / Views: 35,948 |
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Posted 10/08/2008 10:19 pm
