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 Replies: 50 / Views: 4,969 |
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Pillar of the Community
 United States
4778 Posts |
Well that's quite a let down... can't say I didn't try. Ah well, at least I take comfort knowing that there are many more nice Roman coins out there that I may come across. Quote:
The other option is to dry it extremely well and wax it thoroughly and hope the lack of oxygen slows the process. Unfortunately I don't have any Ren wax (if that's the wax you are referring to), so by default I'll have to keep it soaking. But before I do that, do you think heating it in the oven at 350 degrees °F (177 Celsius if that's what's used in the UK) for half an hour will rid it of the BD, or at least minimize the BD's effect? Edited by VisigothKing
02/12/2012 12:08 am
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Rest in Peace
United States
9104 Posts |
Wouldn't Ren wax come off with acetone?
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Pillar of the Community
United States
4778 Posts |
I think I've heard that before. I also think you can heat it off as well.
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Pillar of the Community
United Kingdom
2838 Posts |
Quote:
do you think heating it in the oven at 350 degrees °F for half an hour will rid it of the BD? It wont rid it but will remove one of the catalysts that cause it (I personally dont think water is a cause just a catalyst and transporter). Its only really worth doing if your finished soaking and about to finish the treatment, ideally do it before waxing as moisture starts returning to the coin as soon as it comes out of the oven. No need to have the oven much hotter than 212F as the water will boil at this point. When your finished soaking I would let it evaporate dry at room temp for 24hrs before the oven. The gunk (BD elements) between the coin and the patina will be waterlogged and a sudden change in temp could cause the remaining patina to crack and pop off. This coin has BD very bad. Sometimes you just have to bite the bullet, drying and waxing now is an option but you will never have a stable coin. Ironically, and sadly perhaps, the only thing keeping the patina on is the BD, without it you have a void between that and the actual coin and removing it would make it so weak it could crumble away. Not good news but we've probably all had one of these coins at some point, damned if you do and damned if you dont. You could try to seal it in something airtight and have a think about it, again its just removing a catalyst. I'm not saying this is the best solution but my view is a coin is pointless if its being eaten or not stable. I'd rather suffer the craters and risk of total loss and just get the treatment over with. What is left is what is left, be it OK or nothing at all. Its very unlikely you could have done anything with this coin would have preserved it long term in the condition you received it. |
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Pillar of the Community
United States
4778 Posts |
Truly appreciate all the help and advice you've given me through this whole thread Bobby, thank you  I'll let it finish soaking, then I'll heat it up, and then put it in a 2x2 cardboard flip (the closest to airtite I have right now for coins). That's my plan from this point forward. I'll keep you all updated. At least today wasn't a totally bad day numismatically for me. I got my Arcadius AE2 I posted in another thread  |
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Valued Member
Canada
114 Posts |
Sodium bicarbonate works great for BD. I just put some in a dish with distilled water and soak the coin. It can damage a weak patina if left too long though. I've had good and bad experiences. I would recommend soaking with NaHCO3 for a few hours then go back to plain distilled water. If there are still traces of BD then repeat but take it slow and be patient.
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Pillar of the Community
United States
4778 Posts |
Update: after a few weeks of soaking in distilled water (changing it every couple of days), brushing it a few times, and 4 of what I like to call "oven treatments" (2 of them today), here is the Jovian now:  |
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Pillar of the Community
United States
4778 Posts |
Those black spots are where the BD was.
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Bedrock of the Community
United States
10045 Posts |
I hope the coin is stabilized  Is the red color due to the oven treatments? |
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Pillar of the Community
United States
4778 Posts |
Yeah, mostly. It was the initial soak in distilled that changed it red/orange, then with the oven treatments the red changed in hue to what it is now. After posting the picture I put it in the oven a couple more times just to be on the safe side and now it resides in a 2x2 that I have made as air-tite as I was able to make it.
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Pillar of the Community
United States
4778 Posts |
This is only my second time treating a BD coin, so hopefully I did a good job on this one.
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Pillar of the Community
United States
2596 Posts |
There is a lot of detail on this coin I think it will be fine. It turned out really nice.
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Pillar of the Community
United States
4778 Posts |
Thanks jessvc1 The obverse sure is a contrast to that nasty before photo on the previous page, wow!  |
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Pillar of the Community
United Kingdom
2838 Posts |
You did a very good job. Its always a tight-rope between treating as strongly as possible but not wanting to kill the patient. I'm glad the vast majority of the detail had not been eaten. |
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Pillar of the Community
United States
4778 Posts |
Thanks Bobby. I'm still surprised that I was able to sucessfully treat this coin, because I have little experience with treating BD coins. I used to hate looking at my Jovian but now I actually want to! Now I feel it really is worth the money I paid for it.
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Posted 02/12/2012 12:06 am
