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 Replies: 20 / Views: 1,879 |
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Pillar of the Community
United States
3330 Posts |
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Pillar of the Community
United States
2376 Posts |
Have you tried soaking in acetone. Ofter with a color or tone change it's a contaminate on the surface
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Pillar of the Community
 United States
3330 Posts |
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Have you tried soaking in acetone. The coin looks better now than when I first found it (I am sorry to say)! It has been soaked in acetone, then in xylol and then treated with Verdi-care!  |
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Pillar of the Community
United States
2775 Posts |
Believe this to be considered the early years in the zinc coin development. They had issues with the copper plating in the beginning. No LAM. Thanks, Doug.
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Pillar of the Community
United States
3330 Posts |
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They had issues with the copper plating in the beginning. No LAM. So is this early stage zinc rot? |
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Pillar of the Community
United States
2775 Posts |
If the plating is split I'd say it may be a high probability. But treated with Verti-care may protect it. Give it the test of time and see. Thanks, Doug.
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Rest in Peace
United States
17900 Posts |
The 'crack' that you see is not indicative of zinc rot, although you are showing zinc rot beginning at 6:30 near the periphery and that is probably the main reason everyone advises a treatment which you've already performed.
In an earlier coin I'd say that almost looks like a fantastic die crack, but from 1984 I don't know of any die cracks even half that prominent, so it probably isn't that.
Perhaps someone more familiar with that early stage of zinc planchette use will be able to provide a better answer.
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Pillar of the Community
United States
3330 Posts |
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In an earlier coin I'd say that almost looks like a fantastic die crack, but from 1984 I don't know of any die cracks even half that prominent, so it probably isn't that. At first, I thought it might be a die crack, but did not understand what was happening between it and the rim. I looked at a "Lamination Crack", but that did not quite seem to fit either. The area towards the rim is definitely raised and appears to be peeling away from the surface in places...  Edited by Pete2226
07/08/2015 11:56 am
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Pillar of the Community
United States
6478 Posts |
The important thing to remember about zincs is that they can't LAM.
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Pillar of the Community
United States
3330 Posts |
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The important thing to remember about zincs is that they can't LAM. Okay - thanks for that! I either did not know that or my old age and senility combined to erase it from my memory!  I am noticing that this feature appears to go over the tops of the letters. What might that mean? Does it mean it existed on the planchet before the strike? |
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Bedrock of the Community
United States
62064 Posts |
Looks more like split plating on most areas. On the Motto, can see see under that area. I was wondering if it was struck through foil in that area. If so it would peel upwards. But it if is attacked, then a plating crack. in that area.
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Pillar of the Community
United States
3330 Posts |
I am finding it a bit difficult to take a photo of the area viewing it at an angle. Here is the best I seem to be able to provide:  |
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Bedrock of the Community
United States
62064 Posts |
If you an see any gray in that area, it is plating crack/splitting. If you see no gray and if areas are peeling upwards, then it maybe a struck through foil issue. If you see on the outside edge a starting and ending point if may be a struck through foil.(or possible die crack but they usually don't happen in this area)
Edited by coop
07/08/2015 1:00 pm
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Pillar of the Community
United States
3330 Posts |
No gray showing. The area is definitely higher than the field but not peeling in the sense that it looks like I could insert a pin under it. The edge which looks similar to a crack has a kind of "rolled" appearance sort of like the "rolled" appearance on the end of a bank coin roll - only smaller. That edge is higher than the field and also higher than the area between it and the rim. That area towards the rim also appears higher than the field.
The coin weighs 2.53 g.
Edited by Pete2226
07/08/2015 1:11 pm
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Pillar of the Community
United States
3330 Posts |
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But it if is attacked, then a plating crack. in that area. I have been searching for a photo of a "plating crack". So far I haven't found a photo of one. Does anyone have a link to such a photo? |
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Valued Member
United States
241 Posts |
Interesting. Why is the that zincs can't LAM?
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Replies: 20 / Views: 1,879 |
Posted 07/08/2015 09:40 am
