Lost Items - National Search Service
Please post all your topics related to cleaning your metal detector finds here.
So, I was intrigued by the idea of using Olive oil to 'clean' coins. I got myself a small tub, and literally just poured Olive oil into it. I then plonked the coins in, and waited for 6 months.
The results are pretty good, I'd say. I think it could be even better if you left them in there for a year or two?
Anyhow, here's a before and after video for your perusal. Hope you enjoy
Interesting video and some great results especially that halfpenny token
Its also reminded me that on the back of a top shelf in a kitchen cupboard I have some roman grots that I started soaking last October, time to have a look
Looks like something has changed with the structure of the coins, they have lost the softness if that makes sense?
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I left some Roman coins in it for years - i forgot all about them and to be honest they hardly came out any better, later coins seem to fair better tho looking at your vid
http://www.youtube.com/channel/UC-PJhS_ ... 4Ow/videos
Warning - Contains Treasure n stuff
Minelab CTX 3030 / Minelab Explorer II
Treasure: 1 Gold: 2 Hammered: 2
I've tried olive oil and not found any improvement to be honest, but if you have any low value copper coins or artefacts try rubbing some Danish oil on them with your fingers, only a very, very light coating mind, and let it dry before applying another coat or two, the items get slightly darker and have an attractive light sheen to them, it also prevents further oxidation, so much better that a certain propriety wax that in my opinion leaves metallic items with a sort of powdery finish that looks slightly odd.
If you want to remove the film created by the Danish oil at a later date just soak the object in white spirit for an hour or so,
Brilliant video :-)
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That's a good point. Have a Google of olive oil and metal reactions. Copper and Iron can cause oxidation of the oil and most suggestions are not to store oil in metal containers. So while they look good initially, if the metal is reacting then it must cause degradation in the long term.
I'm getting good advice from the older fellas that have been doing this for years with no ill effect. Most have been detecting since the 70's.
None of them have mentioned this.
Has anyone got any picture examples?
I normally don't soak any coins in oil, Mainly because if it does not work the greasy layer left means its very difficult to do anything else
Not tried the packing tape in the second link above. Sounds like it will take the heavy crud off so any soaking should be quicker
Ah ha, cheers for those links!
So, normal olive oil rather than extra olive oil, and add a bit of lemon for a little further work. I'll be keeping an eye on those coins to see if there's any ill-effect over the next year.
I see 'he who shall not be named' has piped in on the topic. Again, I'll much prefer to take the advice of those that have been doing this for 30 years + and have god knows how much experience between them. I listen to them. A lot.
I've contacted one RE the Olive oil test to make sure his coins are still ok 20-30 years on. I'm sure he wouldn't have advised me if they weren't. I'm still open minded concerning absolute proof if anyone has it though. Pictures, videos etc rather than opinion.
Will post a few phots of some of my finds cleaned with olive oil from nealy 20 years ago when I get home for the weekend kris. Unless something drastic has happened since the last time I looked all is ok it's vegitable oil after all and I am sure after it dries it stops being active in any way..........or will I post some pics of piles of dust
i'm glad your finds are ok.but i was told by the museum you should never use olive oil .so i will not take the chance .
Interesting thread - I'd tried olive oil but was foolishly expecting changes within a couple of weeks! That was a couple of years ago and the coins (which weren't any loss) are still in the oil - I just need to find the container with them in now (moved house since then so probably still in a box!).
If I find them I'll report back too.
The proof is in the pudding. Cheers bud!
Whilst at the British museum for a training course on Roman coinage a couple of years ago.
I got chatting to conservator about cleaning of coins and I asked about olive oil and she advised that cleaning with olive oil can in the long term cause great harm to the coin. she explained that whilst it may have good short term effects on the coin i.e. it brings out more detail, however as its an organic material and not designed specifically for cleaning when it starts to break down it doesn't do this evenly over the surface which creates pockets of bare metal exposed to the moisture in the air and this causes pin point areas of corrosion. These areas corrode a lot faster than if the whole coin was exposed, this will ultimately destroy the coin.
So although your test was good I would love to be able to see the same coins in about 20-30 years time if they haven't turned to dust by then
She did tell me that the best option is distilled water to clean and Renaissance wax to protect.
If no distilled water running tap water is an option.
Minlab Pro Finder
1 Celtic bronze unit
140 Roman Coins
4 Silver Denarius
26 Hammered coins
1 Saxon Pax penny
4 Silver six Pence
Again, the older chaps I know have had no problems with their coins 30 - 40 years on.
alloverover, will post his pictures soon as well. That'll give us a good idea of if it's worth sticking with or not.
I'm hearing what people are saying, but all I'm seeing it's loads of proof in the other corner.
could it be that the archeologist and person that works at the museum could be...just could be...wrong?
So far, I'm sticking with it, but again I'm open to seeing firm proof it doesn't work, or does long term damage.
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