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Trying Verdicare On Some Bronze Australian Coins

 
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Author Previous TopicReplies: 14 / Views: 1,042Next Topic  
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 Posted 07/22/2022  11:44 pm Show Profile   Bookmark this topic Add ttkoo to your friends list Get a Link to this Message
Hi all,
following on from my attempts to remove some gunk from an error sixpence, I said I would try it out on some coppers.
So myself and herself have been at home with COVID since Tuesday and I have been keeping out of the way in my coin room. This has given me the chance to start playing with some verdigris affected bronze from my main collection. I had some practice attempts with some damaged spares and found that gently gently is the correct approach. The qtips can be quite abrasive if over-used in my opinion.
The best results I get is to use an overnight acetone bath first, then let the coin sit for some hours with one or two drops of Verdi-Care spread over the coin face with a toothpick (just enough to get total coverage).
Then place that coin flat on a microfibre cloth with some drops on it also, and gently circle the coin back and forth to remove any loose crud. If there is any hard stuck on scale remaining, I view it on the computer screen via a USB microscope, and try a soaked qtip first, and if it is still stubborn I use a toothpick (sharpened to a fine point on one of herself's nail boards) to gently persuade the muck around the legend outlines.
Once happy I give the whole coin a final gently dry down on a microfibre cloth, then let the coin sit to dry for at least 24 hours.
There is a real fine line between not enough and too much pressure applied with the qtip and toothpick. Using the USB scope on the big screen, if I press too hard, I can immediately see the natural patina being removed real time. So patience is the key.
And also, it is not a miracle "cleaner".
No point using it on something that is all corroded. You need to experiment with some expendables and get a feel for what coin it will help restore.

Results.
Care factor about how kosher my coin is now = 0.
Happiness factor = 8 to 9.
Anyway, judge for yourself, and apologies for the before shots, only have them in their 2x2s





The Ox moves slowly, but the Earth is patient.
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 Posted 07/23/2022  12:41 am  Show Profile   Bookmark this reply Add Jaobler to your friends list Get a Link to this Reply
The coin does appear to be greatly improved. Some might call it too good to be true but I can't see any hairlines or other signs of surface disruption. It looks like the verdigris has been effectively removed, with a very attractive appearance result.

Thanks for sharing!
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 Posted 07/23/2022  08:52 am  Show Profile   Bookmark this reply Add just carl to your friends list Get a Link to this Reply
Nice results. A lot more effort that I would spend on a coin.
just carl
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 Posted 07/23/2022  09:21 am  Show Profile   Bookmark this reply Add mcshilling to your friends list Get a Link to this Reply
That a very nice improvement.
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 Posted 07/23/2022  8:44 pm  Show Profile   Bookmark this reply Add Kopper Ken to your friends list Get a Link to this Reply
Great job...very nice looking...if you want to smooth out the toning, put it on the window sill for a few weeks.

KK
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 Posted 07/24/2022  10:08 pm  Show Profile   Bookmark this reply Add Ballyhoo to your friends list Get a Link to this Reply
Thanks for sharing the before and after. I've wonder about Verdi-Care and the results with copper, although I'm certain other's have posted this is the first seeing them. Well done!
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 Posted 07/24/2022  11:46 pm  Show Profile   Bookmark this reply Add ttkoo to your friends list Get a Link to this Reply
Thanks for the comments and feedback, much appreciated.


Quote:
Great job...very nice looking...if you want to smooth out the toning, put it on the window sill for a few weeks.

Interesting thought. I'll give it a try on some test coins, can't hurt. Thanks.
The Ox moves slowly, but the Earth is patient.
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 Posted 10/05/2022  12:41 am  Show Profile   Bookmark this reply Add ttkoo to your friends list Get a Link to this Reply
I found some spare time this morning to re-visit some Australian bronze pre-decimal coins and start the process to give them a much needed restoration. Most of the collection of small bronze have built up grime and grease, PVC attack and some verdigris.
I'm using a similar process as before, except the acetone bath is only for a few minutes. This seems to work just as well as an overnight soak.
So today's coin is a 1914 George V Half Penny - 1.4 million coins minted in London.

Before and after shots below.


The Ox moves slowly, but the Earth is patient.
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 Posted 10/06/2022  8:54 pm  Show Profile   Bookmark this reply Add ttkoo to your friends list Get a Link to this Reply
Today's coin is a 1914H George V Half Penny - 1.2 million coins minted at Heaton & Sons, Birmingham England

Edit: and as a side note, the apparent change in colour of the coin is IMO just a result of a change in lighting set up between now and when the original shots were taken some months ago. I will take a fresh before-shot for comparison in the future.

Before and after pics below



The Ox moves slowly, but the Earth is patient.
Edited by ttkoo
10/06/2022 9:07 pm
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 Posted 10/07/2022  09:49 am  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
Looking good!

I like how you are getting some circulation cameo after the treatment.
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 Posted 10/07/2022  3:53 pm  Show Profile   Bookmark this reply Add ttkoo to your friends list Get a Link to this Reply
Thanks jbuck, I wonder sometimes if I am trashing these old coins by messing with the ravages of time. But for my mind they have already been trashed and it's like a rescue mission.
The next coin is going to take some time and finessing it's close to being a write-off.
The Ox moves slowly, but the Earth is patient.
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 Posted 10/07/2022  4:04 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply

Quote:
But for my mind they have already been trashed and it's like a rescue mission.
A logical conclusion.

Quote:
The next coin is going to take some time and finessing it's close to being a write-off.
Good luck!
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 Posted 10/10/2022  01:58 am  Show Profile   Bookmark this reply Add ttkoo to your friends list Get a Link to this Reply
Today's coin is the 1915H Australian half penny.
In hindsight I should have come to the conclusion that it wasn't a coin suitable for this type of restoration.
Some of the PVC damage and verdigris is too far gone and I have removed parts of the coin removing it.
Having said that, I don't have another example of this key date coin and didn't particularly want to part with 30 to 40 dollars for a coin of similar poor condition.
I see a slabbed MS63 on eBay ATM for a lowball AU$15,000....sheesh.
Anyway I gave it my best efforts and it does look improved. This one will be on my list to swap out.

1915H Australian Half Penny - Mintage 720,000 -Heaton & Sons - Birmingham, England

Pre treatment



Post treatment
The Ox moves slowly, but the Earth is patient.
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