Olive Oil - Coin Community Forum

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Author	Replies: 4 / Views: 1,220
Nic Pillar of the Community Philippines 1156 Posts	Posted 09/25/2012 10:30 pm Hi! I collect some ancient coppers and somewhere along the way I read olive oil was good for cleaning ancient coppers. so I dunked the coins in high food grade olive oil. but after 6 months of immersion, they took on a black coloration which I now find difficult to take out. Is there some or any way to "re-clean" the ancient coppers? thanks Report this Post to the Staff

chrsmat71 Pillar of the Community United States 4973 Posts	Posted 09/25/2012 10:48 pm Nic, I haven't used olive oil for that long, and only use it on bronze coins that are in really bad shape...heavy encrustations and the like. I have heard olive oil can darken bronze coins, so not surprised about copper. I don't know what you can do to lighten them...I have a feeling it would be difficult to change the color back without damaging the coin but I'd get an expert opinion form someone here. Report this Post to the Staff
Eng5858 Pillar of the Community United States 1316 Posts	Posted 09/25/2012 10:58 pm Nic...... I have cleaned many coins, all I use is olive oil, but I only soak them a week at a time, take them out and brush them off, throw them back, repeat till you get hem clean as you want...some times it takes 6 to 7 mts...to finish, as far as your dark coin, I would wash it off with warm soapy water, them throw it back in, take it out once a week and brush it off.. good luck..... Report this Post to the Staff
Bing Pillar of the Community United States 4253 Posts	Posted 09/25/2012 11:13 pm I no longer clean coins, but I remember that olive oil will darken the coin, even in short baths. I think it best to use distilled water baths. Report this Post to the Staff
echizento Moderator United States 23731 Posts	Posted 09/25/2012 11:34 pm I have used olive oil for years and have got very good results. It does tend to darken the coins some, but I found that if I use extra virgin olive oil it doesn't darken then too much. Report this Post to the Staff
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