|
vBClassified Featured Listings | ||||
|
|
Miscellaneous Questions Anything else that doesn't fit into the Fake Alert Titles, Orders, Medals, or Documents sub-forums should be posted here. |
|
Thread Tools | Display Modes |
05-18-2008, 01:01 AM | #1 |
Senior Member
Join Date: Mar 2008
Location: Germany
Age: 49
Posts: 105
|
Strange green material on the obverse...
Hi,
what`s that green material on the surface of my Prague - medal ? It has the consistency of modelling material. May it be that it`s a rest of a mould (cast copy) ? Thank you very much, Jens* |
Sponsored Links |
05-18-2008, 10:53 PM | #2 |
Senior Member
Join Date: Apr 2007
Location: US Mid Atlantic
Age: 58
Posts: 351
|
Green gunk...
I've seen a similar compound on a "Valiant Labor in the GPW" medal that I know was not faked. Often this green color can come from tarnish with brass compounds, so I wouldn't be surprised if this was either some sort of common Soviet-era polishing compound, or just residue of polishing mixed with dirt/grime/oil.
|
05-19-2008, 05:43 AM | #3 |
Forum Moderator
Join Date: Oct 2004
Location: Eurasia
Posts: 2,342
|
It often exists on old bronze coins too, called verdigris.
|
05-22-2008, 11:11 AM | #4 |
Senior Member
Join Date: Mar 2008
Location: Germany
Age: 49
Posts: 105
|
Re: Strange green material on the obverse...
E.g. : I know the copper oxide called "verdigris", but it`s very hard and difficult to remove off the surface. The material on my medal is soft like a paste; so I think it could be soviet - era polishing material as mentioned before.
Jens*** |
05-22-2008, 08:34 PM | #5 |
Senior Member
Join Date: May 2002
Location: New York USA
Posts: 2,296
|
Re: Strange green material on the obverse...
Jens,
I guess it's impossible to tell from the picture one way or the other. It probably depends on the amount of copper in the alloy, but sometimes verdigris can be easily removed. Alexei |
05-22-2008, 09:24 PM | #6 |
Senior Member
Join Date: Jun 2006
Location: London, UK
Posts: 199
|
Re: Strange green material on the obverse...
Nota Bene,
And once it's removed, is there a simple way to protect the medal from it coming back? I heard of vaseline and varnishes but never tried those. Thanks, Sergei |
05-23-2008, 11:20 PM | #7 |
Senior Member
Join Date: Apr 2007
Location: US Mid Atlantic
Age: 58
Posts: 351
|
Re: Strange green material on the obverse...
Another reason I think that there may be some sort of polishing compound involved is that that old VL-GPW medal also had the green gunk on the suspension and ribbon. It was very greasy. An odd but effective solution: I boiled it. It removed most of it as the gunk went liquid and formed a layer of oil in the pan. Once the pan cooled, the gunk settled along the edges, making it tough to get off the pan!
|
05-31-2008, 03:07 PM | #8 | |
Senior Member
Join Date: May 2002
Location: New York USA
Posts: 2,296
|
Re: Strange green material on the obverse...
Quote:
Sergei, Anything, the protects it from the environment will do. There are also commercially available solutions for protecting coins. Alexei |
|
06-09-2008, 10:38 AM | #9 |
Senior Member
Join Date: Mar 2008
Location: Germany
Age: 49
Posts: 105
|
Re: Strange green material on the obverse...
Hello again,
thanks a lot for your posts, impressions and ideas ! This way we can move forward. Jens ! |
Bookmarks |
Tags |
green residue, polishing, verdigris |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Green Border Guards Cap Device | ekclete | Internal Affairs Uniforms And Insignia | 3 | 08-16-2007 02:54 PM |
Strange patch | Nack | Soviet Uniforms, Hats And Insignia | 3 | 07-06-2004 07:45 PM |
strange navy cap | Al-muell | Naval Uniforms And Insignia | 4 | 04-28-2004 02:10 AM |
Material of some medals | matteti | The Researchers' Corner | 5 | 04-15-2004 02:49 PM |
Vietnam Death From Above Playing Cards
$250.00
RARE WW1 U.S. MARINE CORPS - POEM CARD - LITHO CARD c1917
$150.00
Ruines de Cambrai Ruins of Cambrai 1918 20 War Pictures Booklet of Post Cards
$47.00
Original Russian Soviet WWII Propaganda Card Battle Berlin 1945 Rare Flugblatt
$100.75
wwi- ww2 huge lot of post cards letters and pics .
$50.00
Vintage Unused Civil Defense Organization ID Cards LOT 6
$21.00
WWII Draft Selective Service Classification Cards Lot 1944-1953 Chehalis WA Rare
$26.00
ORIGINAL AVIATOR PLAYING CARDs FEB 16, 1943 - GIFT Of The AMERICAN RED CROSS Red
$28.99
Philippine Insurrection Moro Rebellion Photograph Collection 34 Postcards RARE
$256.75
Camp Cards, 1942 Postcards for Soldiers
$25.00