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Newbie Messed Up In Trying To Clean Coins...

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New Member

United States
9 Posts
 Posted 12/25/2013  5:46 pm Show Profile   Bookmark this topic Add zerae to your friends list Get a Link to this Message Number of Subscribers
I tried the seasalt and vinegar thing...ugh! The dirtiest coins are just more dirty and the cleaner ones have this bizarre rainbow hue now. 1st question...is the best way to clean simply with a little mild soap and warm water? 2nd-can I make this rainbow hue go away? :(
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SsuperDdave's Avatar
United States
23522 Posts
 Posted 12/25/2013  5:53 pm  Show Profile   Bookmark this reply Add SsuperDdave to your friends list Get a Link to this Reply
The part where you "messed up" was in trying to clean them at all. Seasalt and vinegar? What sadist recommended such a thing for a coin? Whatever you do next is likely of no matter; the intrinsic value of these coins has already been erased for good by that first step.

Are these, by some saving grace, Ancients? More stringent measures are in many cases useful for Ancients, which of course have ~2000 years of history encrusted to them.
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1188howest's Avatar
Canada
470 Posts
 Posted 12/25/2013  6:20 pm  Show Profile   Bookmark this reply Add 1188howest to your friends list Get a Link to this Reply


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arianzo's Avatar
Canada
2124 Posts
 Posted 12/25/2013  6:36 pm  Show Profile   Bookmark this reply Add arianzo to your friends list Get a Link to this Reply

Quote:
zerae
I tried the seasalt and vinegar thing.


Did you want to eat the coins?
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Sap's Avatar
Australia
16806 Posts
 Posted 12/25/2013  6:36 pm  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply

Quote:
Seasalt and vinegar? What sadist recommended such a thing for a coin?

WikiHow, Science Bob, and a bazillion other well-meaning but ignorant non-coin-collectors, that's who. Anyone Googling "how to clean copper coins" will probably find them before they find us.

Zerae, the simple fact is, coin collectors do not like their coins to look like they've been cleaned. They'd rather have dirty coins than badly cleaned coins. Most coin collectors are also interested in history and like old things, so we like our coins to show their age. The laws of physics make it impossible for an old, worn coin to ever "look like new again", anyway.

This is why we always say to new collectors and to the non-collecting public, "Don't clean coins". There are rare occasions when coins need cleaning (such as when they're freshly dug up after sitting in the ground for 2000 years) but knowing when to clean and how to clean needs expert guidance.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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sel_69l's Avatar
Australia
21786 Posts
 Posted 12/25/2013  7:02 pm  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
I HAVE cleaned a few low value coins in VF grades and lower with good 'ole soap 'n water to remove obvious dirt. However, trying to improve the appearance of such coins that are otherwise are nominally clean is simply not worth bothering with.

If you happen to have a high value coin in ANY grade that you wish 'clean', think carefully. If you don't know what you are doing, you will almost certainly damage it.
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Buddy's Avatar
United States
7075 Posts
 Posted 12/25/2013  10:02 pm  Show Profile   Bookmark this reply Add Buddy to your friends list Get a Link to this Reply


We're going to have to know more in order to help. Were the coins gold, silver, or copper?

Posting photos would help.

It would also help to know why you have the coins. Are they keepsakes from a relative? You may have done some damage but maybe we can still help you. We just need more information.
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persistnt's Avatar
Canada
726 Posts
 Posted 12/25/2013  10:57 pm  Show Profile   Bookmark this reply Add persistnt to your friends list Get a Link to this Reply
with buddie......we can maybe help......for copper I keep saying olive oil. take a pic before and right after olive oil to campare.......
Edited by persistnt
12/25/2013 10:58 pm
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LincolnGuy's Avatar
917 Posts
 Posted 12/25/2013  11:31 pm  Show Profile   Bookmark this reply Add LincolnGuy to your friends list Get a Link to this Reply

Quote:
for copper I keep saying olive oil. take a pic before and right after olive oil to campare......


Olive oil is also bad advice. It is acidic and degrades into other nasties that will harm metal. Do not use olive oil!
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persistnt's Avatar
Canada
726 Posts
 Posted 12/27/2013  11:55 pm  Show Profile   Bookmark this reply Add persistnt to your friends list Get a Link to this Reply
LincolnGuy yu are right and wrong at the same Refined olive oil is the olive oil obtained from virgin olive oils by refining methods that do not lead to alterations in the initial glyceridic structure. It has a free acidity, expressed as oleic acid, of not more than 0.3 grams per 100 grams (0.3%) and its other characteristics correspond to those fixed for this category in this standard. This is obtained by refining virgin olive oils with a high acidity level and/or organoleptic defects that are eliminated after refining. Note that no solvents have been used to extract the oil, but it has been refined with the use of charcoal and other chemical and physical filters. Oils labeled as Pure olive oil or Olive oil are primarily refined olive oil, with a small addition of virgin-production to give taste . QUANTitative anaysis can determine the oil's "Acidity", which refers NOT to its chemical acidity in the sence of PH (Wrong here LincolnG)but as the % (Measured by weight) of free oleic acid. this is a measure of the hydrolysis of the oils triglycerides : as the oil degrades, more fatty acids are freed from the glycerides, increasing the level of free acidity and thereby increasing hydrolytic rancidity. Another measure of the oils chemical degradation is the peroxide value, which measures the degree to which the oil is Oxidized. Different types of olive oil hav free fatty acid content of .8g per 100g or .8% ,some have 2%..To sum it all up yu are partially right--about Acid in future of coin...I worry about the future numismatists who get an unprotected coin and the Oxidation---So MS 1cents I leave alone- but low value lincolns I wipe with olive oil....Other ways to protect a coin are not as natural as Olive oil....keep paper and cardboard away from coins because of Acid.....
Edited by persistnt
12/28/2013 12:04 am
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persistnt's Avatar
Canada
726 Posts
 Posted 12/28/2013  12:28 am  Show Profile   Bookmark this reply Add persistnt to your friends list Get a Link to this Reply
The unprotected coins I am talking about are the ones yu took out of your salt and vinegar bath.......Those future coin crazey's would want yu to wipe with olive oil,,so that they hav a better coin to look at than say one yu don't do anything with after the salt & vin..those coppers will be deep dark dark dark dark black (Similar to say brit coins from 1700 or early 1800's)....Then place them in 2X2's the white (Acid free)holders..A coin crazey will tell yu even these are for temporary use!! ,,,I will tell yu that while we like to protect against the elements....remember to protect coins from the criminal element as well.........Now that is sound advice..or is it LincolnGuy....Reply if yu like...Don't mind me,, it almost bedtime and I am grouchy..
Edited by persistnt
12/28/2013 12:31 am
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austrokiwi's Avatar
2087 Posts
 Posted 12/28/2013  01:24 am  Show Profile   Bookmark this reply Add austrokiwi to your friends list Get a Link to this Reply
Welcome:

And great joke...got a number of us going.
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stev18's Avatar
United States
329 Posts
 Posted 12/28/2013  10:38 am  Show Profile   Bookmark this reply Add stev18 to your friends list Get a Link to this Reply
I don't really know what to say to all the scientific stuff about olive oil but I can tell you I personally waited patiently for 6 months while some wheats soaked in olive oil and it did basically nothing at all!!
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BadThad's Avatar
United States
19931 Posts
 Posted 12/28/2013  12:08 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
Vinegar has a high acetic acid content - in practical terms, it is basically acid - which will damage metals. Adding salt puts another corrosive element (chloride ion) into the mix. This creates a very corrosive mixture and will permanently damage the surfaces of any coins it's used on.

Unfortunately, you have learned the hard way. The damage cannot be undone. That is the bad part about cleaning coins - once you clean them there is no going back. When you choose to use anything on a coin besides water, acetone or xylene, you are risking permanently damaging your coins.

Soap and water is definitely NOT safe either. I have used it on common circulated coins found while searching but only because I could not see any details and had no choice. It was either the junk pile to return to the bank or the possibility of finding something worth keeping. That's the ONLY time I would ever recommend using soap and water.
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BadThad's Avatar
United States
19931 Posts
 Posted 12/28/2013  12:25 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply

Quote:
LincolnGuy yu are right and wrong at the same Refined olive oil is the olive oil obtained from virgin olive oils by refining methods that do not lead to alterations in the initial glyceridic structure. It has a free acidity, expressed as oleic acid, of not more than 0.3 grams per 100 grams (0.3%) and its other characteristics correspond to those fixed for this category in this standard. This is obtained by refining virgin olive oils with a high acidity level and/or organoleptic defects that are eliminated after refining. Note that no solvents have been used to extract the oil, but it has been refined with the use of charcoal and other chemical and physical filters. Oils labeled as Pure olive oil or Olive oil are primarily refined olive oil, with a small addition of virgin-production to give taste . QUANTitative anaysis can determine the oil's "Acidity", which refers NOT to its chemical acidity in the sence of PH (Wrong here LincolnG)but as the % (Measured by weight) of free oleic acid. this is a measure of the hydrolysis of the oils triglycerides : as the oil degrades, more fatty acids are freed from the glycerides, increasing the level of free acidity and thereby increasing hydrolytic rancidity. Another measure of the oils chemical degradation is the peroxide value, which measures the degree to which the oil is Oxidized. Different types of olive oil hav free fatty acid content of .8g per 100g or .8% ,some have 2%..To sum it all up yu are partially right--about Acid in future of coin...I worry about the future numismatists who get an unprotected coin and the Oxidation---So MS 1cents I leave alone- but low value lincolns I wipe with olive oil....Other ways to protect a coin are not as natural as Olive oil....keep paper and cardboard away from coins because of Acid.....


LincolnGuy made no wrong statements. He didn't say "pH", he correctly referred to "acidity" of olive oil.

Olive oil is a highly variable mixture and it is acidic. It is NOT a coin safe solvent and the end-user has no way of producing consistent results. I see the recommendation to use it on coins all of the time on the internet when, in fact, it is a HORRIBLE solvent to use. I have seen hundreds of coins damaged by it. The acids will corrode the surfaces and the oil will alter the patina.

If you're "wiping coins" with it and leaving it on the surfaces, you are creating the perfect conditions for permanent surface damage as the acids eat into the coin and the oil degrades and promotes bacterial growth (which also adds acidity). Acid and metal do not play well! They should generally NEVER be used on coins if you wish to preserve the surfaces.
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persistnt's Avatar
Canada
726 Posts
 Posted 12/28/2013  1:53 pm  Show Profile   Bookmark this reply Add persistnt to your friends list Get a Link to this Reply
Colonial A is selling 9 and half pounds of mixxed world coins...for a cheap price,,because as they also say the coins hav rust on them.....They say up front all 9 punds are basically uselesss coins.....If I bought these what would be the Verdi-care fluid cost? If I put on olive oil I would wipe off again after overnight or even hour later sometimes,,look at then under loop (Magnify glass),, then staple 2X2 holder, I do occasioally wipe even a cu-ni coin but not many, wipe off in circle motion later,,A collector buddie of mine uses Mineral oil for his Lincolns.....What is the "Acidity" of the v-fluid (.8%)? Other coin fluids to use? What about the unprotected Salt&vin coins do we agree Unprotected, or stripped What about this?What is PH of v-fluid? That is a good joke about Robber Element....
Edited by persistnt
12/28/2013 2:03 pm
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