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- From joshalso2000@yahoo.com Sat Sep 22 17:52:36 2007
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From: Morris Hankins <joshalso2000@yahoo.com>
Subject: Re: [nonregalresearch] Re: [Colonial Numismatics] HOW TO REMOVE VERDIGRIS (GREEN) SPOTS FROM COPPER COINS
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Bob, thanks for the note. I cannot condone the oil in any event. However, the lanolin is of good value and use. You can buy Hydrous Lanolin at 75% strength from your local druggist.
If you use this method apply liberally to both sides of the coin and rub thoroughly into the coin for several minutes. Make sure you also cover the rim. Lay the coin thoroughly covered onto several layers of folded paper towels. Let sit at least 24 hours and then clean off residue with either a soft towel or undershirt. Any remaining gunk in the legends pick out with a wooden dental pick [Johnson & Johnson]. You can also boil the coin and then drop into ice water or iced hydrogen peroxide or distilled water. Then use Ren Wax, Coin Care or Blue ribbon in a light application.
This method is for cleaning dirty coins, not those with green verdigris.
Morris
B B <rlbcomuser@yahoo.com> wrote:
Morris;
I agree totally with you, but my added advice would be
for those who may not bee able to determine the
composition of the gunk, is to try less damaging
methods of removal first. This is true when the
copper has hardened grease of residue from the
rouncing sack treatment or other encrustation. I use
the olive oil and/or a hand cream with lanonin in it
before a light brushing to get the gunk off. This
way you can better see what the surface is really like
and can react appropriately.
BB
--- Morris Hankins wrote:
> If any of you try either of these methods, I will
> send you to a coin-less hell. Bill Love I'll send
> flash floods, tornadoes, and a Blue Northerner to
> keep you occupied down in Texas if you use this
> garbage.
>
> Somebody does not know their chemistry at all.
> All of the green verdgris, brown or red rust spots
> are all chloride salt active chemicals. The so
> called acid dip is nothing more than a type of acid
> cleaning another acid and it will not work. It just
> creates more chloride salt combinations which after
> a year or two goes happily back to muching away at
> your coins.
>
> If you are bound and determined to play in this
> little minefield, then I suggest you obtain a
> number of things before you start. Buy a huge
> bottle of hydrogen peroxide, make an electrolysis
> exchanger, heat lamp, saucepan, Super Washing Soda
> and distilled water [optional - hydrogen peroxide
> will work better]. And read some chemistry manuals.
>
> After the C4 convention, I will put together
> information to accomplish most of these tasks in
> cleaning the five types of different verdigris/rust.
>
> If you must play, limit yourself to hydrogen
> peroxide, teaspoon of Washing soda, and a heat lamp.
> Mix the Washing Soda into a monkey dish or petri
> dish with the hydrogen peroxide and place any type
> lamp directly over the dish to heat the solution.
> The hydrogen peroxide will give off from oxygen
> molecules which will chemically change the
> composition of the verdigris on most coins. It will
> also lighten the color of the coin. Check your
> coin every ten minutes until the verdigris or gunk
> is gone. Clean lightly with a soft toothbrush to
> get any residual salts, gunk or verdigris off.
>
> Next, and this is important. Heat a saucepan of
> distilled water or hydrogen peroxide unti it almost
> boils. Drop the coin in for four or five minutes.
> Remove and then drop the coin into cold distilled
> water. What this does is the cold water will suck
> into the porous copper and wash the salts out. I do
> mine twice this way to prevent reoccurence of coin
> verdigris.
>
> Use Ren Wax or Blue Ribbon or Coin care to give it
> a protective coating. Wipe off any extra residue.
>
> Conserving coins is important. Destroying coins
> by the lack of knowledge is a criminal offense in my
> books. They say read the book before you buy the
> coin.
> I say study the chemistry before you try the
> conservation.
>
> Morris
>
>
> Bill Love wrote:
> Good maintenance information to know.
> Thank you!
>
> Bill Love
>
> Byron Weston wrote:
> The green spots found on some copper
> coins are called verdigris this is a copper salt
> like rust. It is usually copper acetate, but can be
> a copper hydroxide. Neither of these would come off
> with any kind of oil. The copper salts will flake
> off with just rubbing - and that is likely why some
> people think olive oil, or cooking oil will remove
> it. In fact it's just the mechanical friction of
> rubbing that causes it to come off. I have heard
> that the juice of a peach will remove it but I have
> never tried it.
> Some forms are soluble in water so it might be
> possible to use hot water and rub them with your
> thumb or very lightly with a toothbrush to remove
> some of the material. If that does not work the only
> other option is an acid dip. Chances are the coins
> are pitted from the corrosion and removing the
> verdigris will expose the pits and they may look
> worse after dipping than before. You will more
> likely scratch or damage the coin unless you are
> very careful while doing this.
> The acid dip can be made easily from salt and
> ammonia mixed together. If you do this be very
> careful and use gloves. Dip the coin for a short
> period then rinse and wipe clean.
> I wouldn�t undertake this job lightly. You could
> first try it on inexpensive coins until you have got
> it right and then progress to the more expensive
> ones. My recommendation is if you can put up with
> it the way it is then that is the best option.
> Thanks for taking the time to read my guide. I
> hope it has been of some help to you. Please place a
> vote for me at the bottom of this page.
> All the best and happy bidding,
> Chris,
> (Buckscoins).
>
>
>
>
>
>
>
>
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<div>Bob, thanks for the note. I cannot condone the oil in any event. However, the lanolin is of good value and use. You can buy Hydrous Lanolin at 75% strength from your local druggist.</div> <div> </div> <div>If you use this method apply liberally to both sides of the coin and rub thoroughly into the coin for several minutes. Make sure you also cover the rim. Lay the coin thoroughly covered onto several layers of folded paper towels. Let sit at least 24 hours and then clean off residue with either a soft towel or undershirt. Any remaining gunk in the legends pick out with a wooden dental pick [Johnson & Johnson]. You can also boil the coin and then drop into ice water or iced hydrogen peroxide or distilled water. Then use Ren Wax, Coin Care or Blue ribbon in a light application.</div> <div> </div> <div>This method is for cleaning dirty coins, not those with green verdigris.</div>
<div> </div> <div>Morris<BR><BR><B><I>B B <rlbcomuser@yahoo.com></I></B> wrote:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Morris;<BR><BR>I agree totally with you, but my added advice would be<BR>for those who may not bee able to determine the<BR>composition of the gunk, is to try less damaging<BR>methods of removal first. This is true when the<BR>copper has hardened grease of residue from the<BR>rouncing sack treatment or other encrustation. I use<BR>the olive oil and/or a hand cream with lanonin in it<BR>before a light brushing to get the gunk off. This<BR>way you can better see what the surface is really like<BR>and can react appropriately.<BR><BR>BB <BR>--- Morris Hankins <JOSHALSO2000@YAHOO.COM>wrote:<BR><BR>> If any of you try either of these methods, I will<BR>> send you to a coin-less hell. Bill Love I'll send<BR>> flash floods, tornadoes, and a Blue Northerner to<BR>> keep you
occupied down in Texas if you use this<BR>> garbage. <BR>> <BR>> Somebody does not know their chemistry at all. <BR>> All of the green verdgris, brown or red rust spots<BR>> are all chloride salt active chemicals. The so<BR>> called acid dip is nothing more than a type of acid<BR>> cleaning another acid and it will not work. It just<BR>> creates more chloride salt combinations which after<BR>> a year or two goes happily back to muching away at<BR>> your coins.<BR>> <BR>> If you are bound and determined to play in this<BR>> little minefield, then I suggest you obtain a<BR>> number of things before you start. Buy a huge<BR>> bottle of hydrogen peroxide, make an electrolysis<BR>> exchanger, heat lamp, saucepan, Super Washing Soda<BR>> and distilled water [optional - hydrogen peroxide<BR>> will work better]. And read some chemistry manuals.<BR>> <BR>> After the C4 convention, I will put together<BR>> information to
accomplish most of these tasks in<BR>> cleaning the five types of different verdigris/rust.<BR>> <BR>> If you must play, limit yourself to hydrogen<BR>> peroxide, teaspoon of Washing soda, and a heat lamp.<BR>> Mix the Washing Soda into a monkey dish or petri<BR>> dish with the hydrogen peroxide and place any type<BR>> lamp directly over the dish to heat the solution. <BR>> The hydrogen peroxide will give off from oxygen<BR>> molecules which will chemically change the<BR>> composition of the verdigris on most coins. It will<BR>> also lighten the color of the coin. Check your<BR>> coin every ten minutes until the verdigris or gunk<BR>> is gone. Clean lightly with a soft toothbrush to<BR>> get any residual salts, gunk or verdigris off.<BR>> <BR>> Next, and this is important. Heat a saucepan of<BR>> distilled water or hydrogen peroxide unti it almost<BR>> boils. Drop the coin in for four or five minutes. <BR>> Remove
and then drop the coin into cold distilled<BR>> water. What this does is the cold water will suck<BR>> into the porous copper and wash the salts out. I do<BR>> mine twice this way to prevent reoccurence of coin<BR>> verdigris.<BR>> <BR>> Use Ren Wax or Blue Ribbon or Coin care to give it<BR>> a protective coating. Wipe off any extra residue.<BR>> <BR>> Conserving coins is important. Destroying coins<BR>> by the lack of knowledge is a criminal offense in my<BR>> books. They say read the book before you buy the<BR>> coin.<BR>> I say study the chemistry before you try the<BR>> conservation.<BR>> <BR>> Morris<BR>> <BR>> <BR>> Bill Love <BILLWRAYLOVE@YAHOO.COM>wrote:<BR>> Good maintenance information to know.<BR>> Thank you!<BR>> <BR>> Bill Love<BR>> <BR>> Byron Weston <BKWESTON@VERIZON.NET>wrote:<BR>> The green spots found on some copper<BR>> coins are called verdigris this is a copper
salt<BR>> like rust. It is usually copper acetate, but can be<BR>> a copper hydroxide. Neither of these would come off<BR>> with any kind of oil. The copper salts will flake<BR>> off with just rubbing - and that is likely why some<BR>> people think olive oil, or cooking oil will remove<BR>> it. In fact it's just the mechanical friction of<BR>> rubbing that causes it to come off. I have heard<BR>> that the juice of a peach will remove it but I have<BR>> never tried it.<BR>> Some forms are soluble in water so it might be<BR>> possible to use hot water and rub them with your<BR>> thumb or very lightly with a toothbrush to remove<BR>> some of the material. If that does not work the only<BR>> other option is an acid dip. Chances are the coins<BR>> are pitted from the corrosion and removing the<BR>> verdigris will expose the pits and they may look<BR>> worse after dipping than before. You will more<BR>> likely scratch or
damage the coin unless you are<BR>> very careful while doing this. <BR>> The acid dip can be made easily from salt and<BR>> ammonia mixed together. If you do this be very<BR>> careful and use gloves. Dip the coin for a short<BR>> period then rinse and wipe clean.<BR>> I wouldn�t undertake this job lightly. You could<BR>> first try it on inexpensive coins until you have got<BR>> it right and then progress to the more expensive<BR>> ones. My recommendation is if you can put up with<BR>> it the way it is then that is the best option.<BR>> Thanks for taking the time to read my guide. I<BR>> hope it has been of some help to you. Please place a<BR>> vote for me at the bottom of this page.<BR>> All the best and happy bidding,<BR>> Chris,<BR>> (Buckscoins).<BR>> <BR>> <BR>> <BR>> <BR>> <BR>> <BR>> <BR>>
<BR><BR><BR><BR><BR>____________________________________________________________________________________<BR>Need a vacation? Get great deals<BR>to amazing places on Yahoo! Travel.<BR>http://travel.yahoo.com/<BR><BR><BR><BR>Yahoo! Groups Links<BR><BR><*> To visit your group on the web, go to:<BR>http://groups.yahoo.com/group/nonregalresearch/<BR><BR><*> Your email settings:<BR>Individual Email | Traditional<BR><BR><*> To change settings online go to:<BR>http://groups.yahoo.com/group/nonregalresearch/join<BR>(Yahoo! ID required)<BR><BR><*> To change settings via email:<BR>mailto:nonregalresearch-digest@yahoogroups.com <BR>mailto:nonregalresearch-fullfeatured@yahoogroups.com<BR><BR><*> To unsubscribe from this group, send an email to:<BR>nonregalresearch-unsubscribe@yahoogroups.com<BR><BR><*> Your use of Yahoo! Groups is subject to:<BR>http://docs.yahoo.com/info/terms/<BR><BR></BLOCKQUOTE><BR>
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