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 Replies: 17 / Views: 4,775 |
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Pillar of the Community
United States
1721 Posts |
I haven't worked with coin preservation before so this is very new to me. I will stick with coins that have too many issue or coins with minimal value. My results so far are as follows: The V-Nickel was soaked in acetone for approximately 30 hours. Next I treated it with Veri-Care. This definitely made a difference. I tried to avoid cleaning with rubbing and used more of a dabbing motion but some spots needed a little elbow grease. The dabbing motion worked with Q-Tips, changing them often. I also noticed that the nickel soaked in the acetone cleaned easier than the V-Nickel that never was soaked in acetone. The acetone appeared to work as a pretreatment. BEFORE TREATMENT:   AFTER TREATMENT:   This brings me to the Indian Head penny. The blister pimple of green oxidation is proving to be very stubborn. The spot was treated with Veri-Care and allowed to sit for a few minutes. I used a toothpick but was unable to remove this spot. I tried numerous applications and then soaked the penny overnight in the acetone. I tried spot removing the area of question but noticed that repeated rubbing with toothpicks had started to cause discoloration on the coin. I should have allowed the penny to soak for an extended period in the acetone before attempting the Veri-Care. Not much difference in the IHC. She'll need more time or any other advise you guys could provide. IHC BEFORE TREATMENTS:   IHC AFTER TREATMENT:   Edited by mds308
10/23/2012 10:15 am
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Bedrock of the Community
United States
20753 Posts |
Great improvement on the Nickel. However, many would now say it appears to be cleaned. Yet looks a lot better.
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Moderator
 United States
188213 Posts |
The nickel looks great!  The cent may take some more work, but it might not be worth it. As BadThad said in the other thread, what is beneath that verdigris could be bad. In this case, at least the VERDI-CAREâ„¢ will keep it from getting worse. |
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Pillar of the Community
United States
3283 Posts |
The nickel came out very nice, I'm guessing PVC caused the green color. I would say if you got rid of the green dot on the IHC a big pit would be there. |
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Pillar of the Community
United States
8516 Posts |
The nickel looks awesome, way better ! I've tried Verdi-Care on Indians and I just can't get it to work on them. It's a whole different story with Lincoln's, works great and I love the stuff. VC seems to condition a coin too, especially after an acetone soaking which really dries them out.
Oregon coin geek.....*** GO BEAVS ! ! ! ***
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Pillar of the Community
United States
1211 Posts |
You will not be able to get rid of the spot on the IH. It is corrosion.
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Bedrock of the Community
United States
19947 Posts |
Nice conservation on the nickel! That's pretty much what I expected, the verdigris was light to moderate. The IHC is what I also expected. The is a very heavy and thick spot of verdigris. If you didn't have luck with the toothpick method, chances are slim it can be removed without revealing a pit under it. You could try a 24 hour soak in VC followed with the toothpick method. You might be able to reduce the size a bit more. After that, I've leave it. DO NOT RINSE and allow it to dry for at least 24 hours (even longer is better). The VC will neutralize the verdigris permanently so at least it won't continue to grow. Be sure to put it into an airtite or 2x2 after drying! Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Bedrock of the Community
United States
19947 Posts |
Much easier to compare the results with these side-by-side pictures. I hope you don't mind mds.   |
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Bedrock of the Community
United States
19947 Posts |
Quote:
Great improvement on the Nickel. However, many would now say it appears to be cleaned. Yet looks a lot better.
Agreed....but I don't believe by the process he just undertook. I think the coin had been previously cleaned and that is what caused the odd, thin verdigris layer to form. Verdigris is like toning in many ways (in fact, it sometimes causes toning), there are certain looks and patterns to it that reveal it's nature. The problem looks to be verdigris that was developed after PVC exposure. Many do not understand, but "PVC damage" is actually verdigris (or other metallic salt) that develops due to a reaction with hydrochloric acid. The acid mostly attacks the copper atoms to form copper chloride (a component of verdigris) and the green color forms. If this coin was not previously cleaned, I believe the dull surface was caused by the HCl in PVC. The acid will breakdown the flow lines and wipe out the luster. No matter what happened, the bottomline is a collector either has a nasty, corroded coin or a coin without. I think most people would rather have the coin after the conservation attempt.  Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
 United States
1721 Posts |
BadThad,
Thanks for the side by side views. All three of the 1883 V-Nickels had this verdigris. The other two nickel had less detail but also had much less verdigris. These nickels when found were all stored with approximately 200 other loose V-Nickels.
Is it possible that (assuming they were previously cleaned) the chemical used to clean them, overtime, caused this verdigris? Just a thought.
The other two cleaned easier and actually look better. I should have taken before pictures of those too. Would you like to see after pictures of these?
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Moderator
United States
188213 Posts |
Quote:
No matter what happened, the bottomline is a collector either has a nasty, corroded coin or a coin without. I think most people would rather have the coin after the conservation attempt. I agree. In the battle for eye appeal, there is a clear winner here. |
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Bedrock of the Community
United States
19947 Posts |
Quote:
Is it possible that (assuming they were previously cleaned) the chemical used to clean them, overtime, caused this verdigris? Just a thought.
Cleaning refreshes the metallic surfaces making them more suspectable to corrosion. While the cleaner itself may or may not contribute (depending if a residue remained) to the verdigris formation, the corrosion was invited in for a party with an open bar when the oxidation layer was removed by the cleaning.  |
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Moderator
United States
188213 Posts |
Quote:
...the corrosion was invited in for a party with an open bar when the oxidation layer was removed... Nice! |
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Bedrock of the Community
United States
19947 Posts |
Sometimes I crack myself up! |
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Pillar of the Community
United States
1721 Posts |
Maybe it's all those Verdi-Care fumes? My head is spinning  |
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Bedrock of the Community
United States
19947 Posts |
Oh....I forgot to thank you mds for sharing your VC results.....THANKS! I really enjoying seeing results! Not many people take the time to photograph and document what they did.
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Replies: 17 / Views: 4,775 |
Posted 10/23/2012 11:02 am
