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 Replies: 25 / Views: 1,605 |
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Pillar of the Community
 United States
2683 Posts |
1837 Hard Times token (United States). My goal was to reduce the crusty black mass at 2 o'clock on the reverse to where it is no longer distracting without affecting the rest of the coin. Before:   After a few hours in VerdiCare and some very soft nudges with a toothpick:   Edited by t360
09/04/2024 1:08 pm
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Moderator
United States
164495 Posts |
Much better!  |
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Bedrock of the Community
United States
18757 Posts |
Fantastic, t360 - much improved!
Inordinately fascinated by bits of metal with strange markings and figures
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Pillar of the Community
 United States
7167 Posts |
Whew ... Good thing I read your post. I was about ready to call the SPCA  |
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Bedrock of the Community
United States
59760 Posts |
Looks much better. Nice improvement! Errers and Varietys.
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Moderator
United States
164495 Posts |
Quote:
Good thing I read your post. I was about ready to call the SPCA 
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Pillar of the Community
United States
5798 Posts |
Looks better, but seems to have been cleaned before and the verd-care has brought out the "shininess" of the old cleaning.
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Pillar of the Community
 United States
2683 Posts |
There is still a very thin layer of VC on the coin, which causes it to look a slight bit shiny or oily. I haven't decided if I should wash it off or not.
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Bedrock of the Community
United States
94367 Posts |
I don't see a great deal of difference to be honest.
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Pillar of the Community
United States
2683 Posts |
Yes. The goal was to surgically remove the black blob at 2 o'clock without killing the patient.
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Pillar of the Community
Canada
5185 Posts |
Disagree , the original surfaces are now gone .
A dab of olive oil left for about a month,
on the spot in question would likely
have accomplished the same result .
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Pillar of the Community
United States
2683 Posts |
I see your point, that if I really don't want to affect the whole coin I should try only treating only the small area. However in my experience VC is faster penetrating than olive oil and less likely to cause the coin to turn dark. So I'll get some pipettes and try a drop of VC next time.
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Moderator
United States
164495 Posts |
I disagree with the disagree, but it is just my personal preference. I will not evangelize. |
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Bedrock of the Community
United States
19676 Posts |
Looks like a great conservation! I would leave the VC on the coin and put it in a holder.
Agree with your conclusion, just a small drop of VC directly on the residue with a toothpick would have been best. You don't need a pipet, just technique that's easy to practice:
1) Wet the tip of a toothpick by hanging a drop from the VC bottle, it will quickly absorb the VC not even using the full hanging drop.
2) Pull the bottle away and keep the toothpick a bit horizontal.
3) Lightly touch the tip of the wet toothpick to the center of the residue, it will form a dome of VC over the residue. (Be careful not to get VC anywhere else on the coin)
4) Allow to sit for 5 minutes.
5) Gently touch a paper towel corner to the dome to remove excess VC (keeps it from spreading much)*.
6) Take the the wet end of the toothpick and twist it against the residue taking care not to use much pressure. If it gets too dirty, flip to the other end, wet it a little with VC and continue.
7) Dab off anything left, I like a microfiber towel, rinse with isopropanol and let dry.
*Sometimes I leave the dome (thick or dry residue) and use a toothpick but it's hard to keep the VC from spreading. It also depends on the individual coin's patina. VC can damage toning.
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Bedrock of the Community
United States
19676 Posts |
An except from my book: Quote:
As a result of its popularity, I have devoted a large section of this book to it in order to help the layman understand how it works. Olive oil has been a long time favorite of collectors for the conservation of coins. You will read everywhere people recommending its use to remove coin surface contaminants. If used carefully, it has many advantages and I've seen collectors successfully conserve coins using EVO. On the flip side, I've also seen collectors damage their coins using it. The main problem with EVO is consistency from bottle to bottle. The contents can vary greatly from batch to batch. EVO is made for eating and not for chemistry!
EVO is a mixture of many chemicals, mainly triglyceride which is three fatty acids attached to the glycerol molecule. Oleic acid (CH3(CH2)7CH=CH(CH2)7COOH) is present in high amounts in EVO, perhaps 50% or greater. Also present is Linoleic acid (< 10%) and Linolenic acid. There is also a small percentage of water. Being a natural product, it also contains other fatty acids, volatile organic compounds, vitamins, water-soluble organics, oil soluble organics and finely ground olive. It's quite a mixture! Here's what some of the molecules look like in chemist speak:.....
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
United States
2683 Posts |
Thank you for sharing this technique. I will definitely try it out when the opportunity arises.
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Replies: 25 / Views: 1,605 |
Posted 09/04/2024 12:42 pm
