[Colonial Numismatics] Cleaning Coppers that are BLACK

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From madcoins@earthlink.net Thu Feb 27 10:24:19 2003
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Subject: Re: [Colonial Numismatics] Cleaning Coppers that are BLACK
Date: Thu, 27 Feb 2003 13:09:49 -0800
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From: "THOMAS F. MADIGAN, III-" <madcoins@earthlink.net>
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WOW!
I'm impressed!!
Maybe its time to dump my green olive oil!
Cheers,
Tom
----- Original Message -----=20
From: Slospokes=20
To: colonial-coins@yahoogroups.com=20
Sent: Thursday, February 27, 2003 9:41 AM
Subject: Re: [Colonial Numismatics] Cleaning Coppers that are BLACK

Ray, It was I that posted cleaning with Hydrogen Peroxide. I used Olive =
Oil for over twenty years and NEVER liked the results, I have been using th=
e H2O2 for over a year now and I am very satisfied with the results. Oliv=
e oil is messy, takes a long time, the oil continues to leach out of a more=
corroded coin after cleaning is done. Peroxide takes but a few hours. I =
have attached a few examples of before and after... Don Hartman

Directions for the Cleaning of Artifacts/Coins using Hydrogen Peroxide

=20=20=20

Required items:

=
=20

1 - Disposable plastic bowl - I use an empty margarine conta=
iner

=20=20=20

=20=20=20

1 - Bottle of Hydrogen Peroxide which is 3% H2O2=20

=20=20=20

=20=20=20

1 - Heat Source - I have a gooseneck lamp with a halogen bul=
b in it.

=20=20=20

=20=20=20

1 - Box of Cotton Swabs - Q Tips are the best - others fall =
apart too easily

=20=20=20

Make sure the artifact/coin is free of any oil coating like olive oil if =
you previous had soaked this object. The oil coating prevents the Hydrogen=
Peroxide from working on the dirt.

=20=20=20

Put object to be cleaned in disposable plastic bowl and then pour Hydroge=
n Peroxide on top until it is at least a half an inch above the object to b=
e cleaned.

=20=20=20

Using the lamp as a heater, I position the lamp to within 2-4 inches of t=
he bowl. This heats up the solution. Be careful not to cause anything to =
melt from too much heat, use common sense for this part. A Heat Source is =
NOT necessary, but it does speed up the cleaning significantly...

=20=20=20

If the solution is hot enough the boiling of the Peroxide should be very =
evident to you and should remind you of a geyser. Once it is cooking it sp=
rays the bubbles and smokes a little also. This should continue for anywhe=
re from one hour to two or three.=20=20

=20=20=20

Periodically remove the object if you want to check on the progress. I u=
sually then lay it on a napkin and take a cotton swab and start to gently r=
ub and see how much crud is coming off the object. It might take one; two =
or three hours to get real clean. You might even have to repeat the entire=
process if the object has a lot of stubborn crud on it.

=20=20=20

When the bubbling of the Peroxide stops the cleaning also is done. If it=
needs more cleaning start over again with fresh fluid.

=20=20=20

Keep your cotton swabs wet with the Peroxide while gently rubbing, this w=
ill prevent scratches.

=20=20=20

When done with your cleaning, rinse the object well with water.

=20=20=20

The first coin I did with this method did not require any rubbing whatsoe=
ver. I believe each artifact/coin is unique in how it is cleaned. Some di=
d not clean up hardly at all. If it is a corroded object, like a pitted, g=
reen Indian Head, I don't think anything you do will help that.

=20=20=20

My best advice is to experiment on non-valuable objects first and then mo=
ve on to your better finds once you build confidence in what you are doing.

=20=20=20

The objects will appear dried out after cleaning, if you want you can coa=
t with a very light amount of Blue Ribbon or other coin cleaner/preservativ=
e..=20=20=20=20=20

----- Original Message -----=20
From: Ray Williams=20
To: colonial-coins@yahoogroups.com=20
Sent: Thursday, February 27, 2003 11:41 AM
Subject: Re: [Colonial Numismatics] Cleaning Coppers that are BLACK

Are there any dentists out there? I've always wondered if the pater pi=
c
that shoots high pressure water for cleaning plaque from teeth, would w=
ork
on removing corrosion from a coin (verdigris too).

Ray W

----- Original Message -----
From: <jlorenzo@ob.ilww.com>
To: <colonial-coins@yahoogroups.com>
Sent: Thursday, February 27, 2003 11:32 AM
Subject: [Colonial Numismatics] Cleaning Coppers that are BLACK

> The best way to clean coppers is not to clean coppers. However, if
> you "must" and since there is some truth that corrosion areas can
> become worse particularly if the coin is not stored correctly then
> some form of cleaning makes sense. I would use a neutral type
> cleaner. Neutral being neither a water or solvent-base alkaline or
> acidic material but a solvent with no additives.
> Solvents such as freon I found worked the best with a Q-tip not
> leaving any post discoloration. Freon is tough to get due to the
> ozone issue. It was one solvent I found that did not discolor the
> copper-At ALL. However, today try an alcohol such isopropanol or a
> ketone such as acetone. A black copper is however something different
> than a dirty brown copper. A solvent will remove light loose dirt and
> surficial particles and for this type of black patina - I would
> proceed with this solvent step in removing the surficial soils and
> leave the black color. The only thing worse than a black coin is a
> discolored coin with black remnants in all of the motifs. Black
> patina coppers are around and is not that much of a deterrent on its
> price unless surficial corrosion is present with this off-patina.
>
> JPL.
>
>
>
> To unsubscribe from this group, send an email to:
> colonial-coins-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/te=
rms/
>
>

To unsubscribe from this group, send an email to:
colonial-coins-unsubscribe@egroups.com

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.=20

Yahoo! Groups Sponsor=20
ADVERTISEMENT
=20=20=20=20=20=20=20=20=20=20=20=20=20
=20=20=20=20=20=20=20
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To unsubscribe from this group, send an email to:
colonial-coins-unsubscribe@egroups.com

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.=20

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<DIV>WOW!</DIV>
<DIV>I'm impressed!!</DIV>
<DIV>Maybe its time to dump my green olive=20
oil!</DIV>
<DIV>Cheers,</DIV>
<DIV>Tom</DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LE=
FT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black">Fro=
m:=20
<A title=3Dslospokes2@comcast.net=20
href=3D"mailto:slospokes2@comcast.net">Slospokes</A> </DIV>
<DIV style=3D"FONT: 10pt arial">To: <A=20
title=3Dcolonial-coins@yahoogroups.com=20
href=3D"mailto:colonial-coins@yahoogroups.com">colonial-coins@yahoogroups=
.com</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial">Sent: Thursday, February 27, 2003 =
9:41=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial">Subject: Re: [Colonial Numismatics=
]=20
Cleaning Coppers that are BLACK</DIV>
<DIV> </DIV>
<DIV>
Ray, It was I that posted cleaning with Hydrogen Peroxide. =
I used=20
Olive Oil for over twenty years and NEVER liked the results, I have been =
using=20
the H2O2 for over a year now and I am very satisfied with the=20
results. Olive oil is messy, takes a long time, the oil contin=
ues=20
to leach out of a more corroded coin after cleaning is done. Peroxi=
de=20
takes but a few hours. I have attached a few examples of before and=
=20
after... Don Hartman
 
Directions for the Cleaning of Artifacts/Coins using Hydrogen=20
Peroxide
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
Required items:
<SPAN=20
style=3D"mso-tab-count: 2"> &nbs=
p; &=
nbsp; =20

1<SPAN=20
style=3D"mso-tab-count: 1"> &nbs=
p; =20
- Disposable plastic bowl =96 I use an empty margarine=20
container
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
1<SPAN=20
style=3D"mso-tab-count: 1"> &nbs=
p; =20
- Bottle of Hydrogen Peroxide which is 3% H2O2 
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
1<SPAN=20
style=3D"mso-tab-count: 1"> &nbs=
p; =20
- Heat Source =96 I have a gooseneck lamp with a halogen bulb in=20
it.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
1<SPAN=20
style=3D"mso-tab-count: 1"> &nbs=
p; =20
- Box of Cotton Swabs =96 Q Tips are the best =96 others fall apar=
t too=20
easily
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
Make sure the artifact/coin is free of any oil coating like oliv=
e oil=20
if you previous had soaked this object.=
=20
The oil coating prevents the Hydrogen Peroxide from working on the=
=20
dirt.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
Put object to be cleaned in disposable plastic bowl and then pou=
r=20
Hydrogen Peroxide on top until it is at least a half an inch above the ob=
ject=20
to be cleaned.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
Using the lamp as a heater, I position the lamp to within 2-4 in=
ches of=20
the bowl. This heats up th=
e=20
solution. Be careful not t=
o cause=20
anything to melt from too much heat, use common sense for this part.<SPAN=
=20
style=3D"mso-spacerun: yes"> A Heat Source is NOT necessary,=
but it=20
does speed up the cleaning significantly...
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
<FONT=20
face=3D"Times New Roman">If the solution is hot enough the boiling of the=
=20
Peroxide should be very evident to you and should remind you of a geyser.=
<SPAN=20
style=3D"mso-spacerun: yes"> Once it is cooking it sprays th=
e=20
bubbles and smokes a little also. =
=20
This should continue for anywhere from one hour to two or three.<S=
PAN=20
style=3D"mso-spacerun: yes"> 
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
Periodically remove the object if you want to check on the=20
progress. I usually then l=
ay it=20
on a napkin and take a cotton swab and start to gently rub and see how mu=
ch=20
crud is coming off the object. </=
SPAN>It=20
might take one; two or three hours to get real clean.<SPAN=20
style=3D"mso-spacerun: yes"> You might even have to repeat t=
he=20
entire process if the object has a lot of stubborn crud on it.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
When the bubbling of the Peroxide stops the cleaning also is don=
e.<SPAN=20
style=3D"mso-spacerun: yes"> If it needs more cleaning start=
over=20
again with fresh fluid.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
Keep your cotton swabs wet with the Peroxide while gently rubbin=
g, this=20
will prevent scratches.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
When done with your cleaning, rinse the object well with=20
water.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
The first coin I did with this method did not require any rubbin=
g=20
whatsoever. I believe each=
=20
artifact/coin is unique in how it is cleaned.<SPAN=20
style=3D"mso-spacerun: yes"> Some did not clean up hardly at=
=20
all. If it is a corroded o=
bject,=20
like a pitted, green Indian Head, I don=92t think anything you do will he=
lp=20
that.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
My best advice is to experiment on non-valuable objects first an=
d then=20
move on to your better finds once you build confidence in what you are=20
doing.
<FONT=20
face=3D"Times New Roman"> <o:p></o:p>
<FONT=20
face=3D"Times New Roman">The objects will appear dried out after cleaning=
, if=20
you want you can coat with a very light amount of Blue Ribbon or oth=
er=20
coin cleaner/preservative..<SPAN=20
style=3D"mso-tab-count: 1"> =20
</DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-=
LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black">F=
rom:=20
<A title=3Dnjraywms@optonline.net href=3D"mailto:njraywms@optonline.net=
">Ray=20
Williams</A> </DIV>
<DIV style=3D"FONT: 10pt arial">To: <A=20
title=3Dcolonial-coins@yahoogroups.com=20
href=3D"mailto:colonial-coins@yahoogroups.com">colonial-coins@yahoogrou=
ps.com</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial">Sent: Thursday, February 27, 200=
3 11:41=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial">Subject: Re: [Colonial Numismati=
cs]=20
Cleaning Coppers that are BLACK</DIV>
<DIV> </DIV><TT>Are there any dentists out there? I've always=
=20
wondered if the pater pic that shoots high pressure water for cleani=
ng=20
plaque from teeth, would work on removing corrosion from a coin=20
(verdigris too). Ray W ----- Original Message ----- Fr=
om:=20
<<A=20
href=3D"mailto:jlorenzo@ob.ilww.com">jlorenzo@ob.ilww.com</A>> To=
:=20
<<A=20
href=3D"mailto:colonial-coins@yahoogroups.com">colonial-coins@yahoogrou=
ps.com</A>> Sent:=20
Thursday, February 27, 2003 11:32 AM Subject: [Colonial Numismatics]=
=20
Cleaning Coppers that are BLACK > The best way to clean=20
coppers is not to clean coppers. However, if > you "must" and sin=
ce=20
there is some truth that corrosion areas can > become worse=20
particularly if the coin is not stored correctly then > some form=
of=20
cleaning makes sense. I would use a neutral type > cleaner. Neutr=
al=20
being neither a water or solvent-base alkaline or > acidic materi=
al=20
but a solvent with no additives. > Solvents such as freon I found=
=20
worked the best with a Q-tip not > leaving any post discoloration=
.=20
Freon is tough to get due to the > ozone issue. It was one solven=
t I=20
found that did not discolor the > copper-At ALL. However, today t=
ry an=20
alcohol such isopropanol or a > ketone such as acetone. A black c=
opper=20
is however something different > than a dirty brown copper. A sol=
vent=20
will remove light loose dirt and > surficial particles and for th=
is=20
type of black patina - I would > proceed with this solvent step i=
n=20
removing the surficial soils and > leave the black color. The onl=
y=20
thing worse than a black coin is a > discolored coin with black=20
remnants in all of the motifs. Black > patina coppers are around =
and=20
is not that much of a deterrent on its > price unless surficial=20
corrosion is present with this off-patina. > >=20
JPL. > > > > To unsubscribe from this group, se=
nd an=20
email to: >=20
colonial-coins-unsubscribe@egroups.com > > > > =
Your=20
use of Yahoo! Groups is subject to <A=20
href=3D"http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/t=
erms/</A> > > </TT> <TT>To=20
unsubscribe from this group, send an email=20
to: colonial-coins-unsubscribe@egroups.com </TT> <TT>Y=
our=20
use of Yahoo! Groups is subject to the <A=20
href=3D"http://docs.yahoo.com/info/terms/">Yahoo! Terms of Service</A>.=
</TT>=20
 </BLOCKQUOTE> <TT>To=20
unsubscribe from this group, send an email=20
to: colonial-coins-unsubscribe@egroups.com </TT> <TT>You=
r use=20
of Yahoo! Groups is subject to the <A=20
href=3D"http://docs.yahoo.com/info/terms/">Yahoo! Terms of Service</A>.</=
TT>=20
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