1892 Large Cent - Coin Community Forum

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Author	Replies: 7 / Views: 1,549
Paulsz Pillar of the Community Canada 2187 Posts	Posted 01/29/2015 7:26 pm Would an acetone bath clear up that green stuff? Also, what obverse is it? Report this Post to the Staff

fourmack Pillar of the Community New Zealand 1679 Posts	Posted 01/29/2015 7:55 pm OBV 3a --closed C in CANADA and large serif on centre bar of E in DEI. cheers Don Cheers Don Vickies cents and GB Farthings nut. "Old" is a figure of speech and nothing more Report this Post to the Staff
UncleLuc Valued Member Canada 270 Posts	Posted 01/29/2015 9:03 pm Grade VF20 The "green stuff" is called copper carbonate, basically tarnish. It is caused by copper being exposed to oxygen & elements in the air. Dipping in acetone is a little extreme and is really not necessary as it wont improve the grade, and really isn't that bad... IF you INSIST on dipping it, I would personally use lemon juice instead of acetone. It will remove the copper carbonate, but is mild enough not to disturb the metal. Once its gone, rinse with distilled water & PAT dry. Again, this is only if you really want to remove it but I DO NOT recommend cleaning, dipping or altering ANY coin, ever. Dirt is dirt, tarnish is tarnish, dipping is damage, period. Report this Post to the Staff
Paulsz Pillar of the Community Canada 2187 Posts	Posted 01/29/2015 10:07 pm Quote: IF you INSIST on dipping it, I would personally use lemon juice instead of acetone. It will remove the copper carbonate, but is mild enough not to disturb the metal. Once its gone, rinse with distilled water & PAT dry. thank you UncleLuc! I will definitely give it a second thought before doing anything to it. Might just keep it as is Report this Post to the Staff
SHAFTA9a Bedrock of the Community Canada 10743 Posts	Posted 01/30/2015 06:55 am Quote: Might just keep it as is. I would.. VF-20 What's that 'line' under CENT scratch or die crack? Report this Post to the Staff
Paulsz Pillar of the Community Canada 2187 Posts	Posted 01/31/2015 11:48 am Quote: What's that 'line' under CENT scratch or die crack? it's a scratch unfortunately :( but the picture brings it out a lot more than in hand Report this Post to the Staff
M_d_in_guy Pillar of the Community Canada 1049 Posts	Posted 01/31/2015 12:35 pm Sorry my mistake here as I didn't look at the pics long enough with the site off and on as it's been. The following is not applicable here- AKA, bronze disease which when not kept in check continues to grow and underneath the growth the coin is corroding. I've had a few like these and did immerse them in a pure acetone bath and with a camel hair brush gently removed the green, it revealed a spot underneath the growth but it did stop further advancement. I too agree with not cleaning a coin, but to preserve a coin sometimes you just have to. IMO. I've tried acidic base liquids in the past and find they disturb the patina. Edited by M_d_in_guy 01/31/2015 1:43 pm Report this Post to the Staff
UncleLuc Valued Member Canada 270 Posts	Posted 01/31/2015 1:23 pm I dont think copper corbonate is corrosion at all, it is more of a growth. The green might get larger, but will not "rot" or "eat" the metal. It is not the same as steel corrosion, rather similar to silver tarnish. No cleaning will "stop" it, and acetone WILL damage the metal...if you want to prevent further carbonate build-up, simply put it in an air-tite or a slab. This will limit the oxygen exposure, stabilizing it. Report this Post to the Staff
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