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 Replies: 29 / Views: 2,836 |
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Pillar of the Community
United States
4253 Posts |
I just did a check on line and found that extra virgin olive oil is less acidic then pure olive oil. So once again, I am wrong. Go ahead and use extra virgin. It should be safe.
JW
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Pillar of the Community
 United States
2044 Posts |
I almost had a heart attack there for a moment. I am also using extra virgin olive oil. Haha
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Pillar of the Community
United States
4778 Posts |
Well, I'll just cancel that trip to the supermarket then lol.
jw, I just read online that distilled water is also a good method for cleaning. Can you confirm?
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Pillar of the Community
United Kingdom
2838 Posts |
Distilled water is good Jango, very, very slow but good, its probably the least 'dangerous' way of cleaning a coin. Its the soaking over time that cleans the coin, it means the dirt is slowly penetrated.
Distilled water is used because it is purer than tap water. Tap water is fine for rinsing coins and giving them a quick scrub but it contains a lot of minerals that coins don't like, these minerals can also cause bronze disease (contentious issue but they very probably do have some effect on BD).
Any form of purified water will do - as long as the other minerals have been removed leaving a higher concentration of H2O. I've been using de-ionised water as although the process to make it is different the end results are very similar, cleaner H20.
Distilled water is also good for curing BD, (is it ever cured or does it just slow to snails pace? Again a contentious issue) soaking an effected coin for long periods helps to draw these damaging minerals out of the coin and into the water, changing the water gets rid of the ones already drawn out. Baking and waxing the coin help to prevent them from returning.
I've had bad luck buying BD coins recently and have also bought a few uncleaned coins so I've been fiddling about with distilled, de-ironised, hydrogen peroxide and various other liquids. Fun, but often not as rewarding as one hopes.
Edited by bobbyhelmet
10/28/2011 2:19 pm
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Pillar of the Community
United States
2044 Posts |
After you're done cleaning is it a good idea to coat the coin with a thin layer of oil or only dry them off?
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Pillar of the Community
United States
4253 Posts |
One method I use is to quick soak the coin in rubbing alcohol which helps in the drying of the coin. Once dried, I use Renaissance wax for protection, but I see no problem using a very thin layer of oil.
JW
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Pillar of the Community
United Kingdom
2838 Posts |
I too use Renaissance wax - If a coins been treated for BD I put it in the oven for 20 mins on a lowish temperature to drive any moisture out then wax it while its still hot. A warning though, heating a coin will change the patina (darken it usually) and can do bad things to the silvering. Its personal choice really, collectors will differ in what they like.
The only thing I would say is if the coin is valuable, much liked or you intend to sell it think long and hard before you do anything to it.
Never used oil but I don't see why it wouldn't work to keep moisture out.
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Pillar of the Community
United States
2044 Posts |
I will keep that in mind. Right now I have two types of oil and that is sunflower oil and olive oil. Of course I'm not going to use olive oil to coat the coin. Would sunflower oil be ok? I don't recall the oil having any acidic content.
Also, I'd like to know what BD is. I'm not good with unknown abbreviations. lol
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Pillar of the Community
United Kingdom
2838 Posts |
BD is bronze disease - More info here from people more knowledgeable than me: http://www.coincommunity.com/forum/...PIC_ID=61519I don't really know what long term effects sunflower or olive oil would have on a coin, if any - generally if you soak a coin in oil it darkens and changes the appearance of the coin, usually this is aesthetically pleasing. I would assume to some extent the coin must draw some of the oil in and it would constitute a protective coating. Not sure, probably not the best to give advice on this matter. I would recommend Ren Wax - it looks expensive but a 200ml pot can last a very, very long time. |
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Pillar of the Community
United Kingdom
2838 Posts |
Forgot to add - two things I would not recommend are artificial patinas and the thick varnish like coatings, these practices will make the resale value of a coin almost worthless.
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Pillar of the Community
United States
2044 Posts |
I have ran into a site that showed how to make artificial patinas and read some articles about people using them to scam the coin market. I definitely don't want to have artificial patinas.
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Pillar of the Community
United States
2596 Posts |
Ive got a few soaking in olive oil now and nice coin Gil-galad.
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Pillar of the Community
United States
4778 Posts |
Yeah jw, I'll see if I can set up like a kind of before-after kind of thing when I clean them. As soon as I get renaissance wax, I'll get started!
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Pillar of the Community
United States
2044 Posts |
After soaking in olive oil for about 2 days, I am now soaking it in hydrogen peroxide. The coin must be fairly cleaned since it's not fizzing too much, or the peroxide is almost dead. Although, it shouldn't be since I just purchased a bottle of it. I did thoroughly clean the oil off before placing it in the peroxide.
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Pillar of the Community
United States
2044 Posts |
Ok, a update about this coin after some heavy cleaning. I think I pretty much over cleaned it a bit.  One thing I noticed is that this coin is thicker than the Constans I just purchased at FORVM. That coin is surprisingly thin. Once again, thanks a lot JW for the coin. I really appreciate it! |
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Replies: 29 / Views: 2,836 |
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Posted 10/28/2011 1:41 pm
