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 Replies: 8 / Views: 1,664 |
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Pillar of the Community
Canada
864 Posts |
Hi. I have a 2009 magnetic Canadian penny that has a bit of an inner side rim break like the plating didn't completely cover the rim, so very obvious "layered" look that exposes a bit of another rim beneath it. The break (Obverse) starts at about the "R" in Regina and runs to about the "N" in Regina. Widest "break part" exposing the underneath rim "from the beginning of the G to beginning of the N" My scanner doesn't show this very well at all so I'm having to describe it for you :( I'll look around online to see if I can find a clearer image of a similar rim. I wonder if this kind of break has any value? And what would you call this kind of flaw? Plating error? Seems the metal didn't melt and fully flow and cover all where it was supposed to. I'm sorry that my scanner is a small image and doesn't clearly show the coin but you can tell that something is a bit off there, even with this scan. To the naked eye the flaw is very obvious to see and with eyeglasses and or a magnifying glass VERY VERY obvious.  Edited by Dottir
08/24/2010 7:55 pm
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Valued Member
Canada
426 Posts |
I'm sorry but nothing is visible in your image. Unless your scanner is ancient, you should be able to play with the settings to produce a larger scan
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Pillar of the Community
 Canada
864 Posts |
Sorry its a lousy scan. I'll fiddle around and try to get a bigger and clearer image somehow. I've posted 2 images I uploaded to that photobucket and they both post small. Maybe I can play with some settings on my scanner. Will have to find the manual ;)
By the way, you can see a "spot" between the are and two dots before it. Thats a very obvious nick on the rim. Not part of the rim problem I'm talking about though ;)
Edited by Dottir
08/25/2010 2:33 pm
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Bedrock of the Community
United States
12437 Posts |
Quote:
Seems the metal didn't melt and fully flow and cover all where it was supposed to.
I cannot see much of anything in the provided image but I can tell you that nothing melts during the striking of a coin, it is strictly a cold flow process. |
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Pillar of the Community
Canada
864 Posts |
Ok, tried another scan, sideways with the problem area about 12 o'clock or so. Enlarged image a bit in photobucket. Hope you can see a bit better but am fearing that scanning coins isn't going to give good enough coin images for people to clearly see my coins :( You can see a bit better that there is some irregularity above Regina in this one (I hope!)  |
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Pillar of the Community
Canada
864 Posts |
Interesting, didn't know that! I just assumed plating means hot metal melted over something. I see I'll have to read up a bit about the tech side of coin minting ;)
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Bedrock of the Community
United States
12437 Posts |
Silly me, I thought you were referring to the striking of the coin but the statement still applies. Plating does involve molten metal, too uncontrolled for coins. Plating is typically done in an electrolytic chemical bath where the thickness of the plate can be precisely applied to only a few mils thickness.
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Pillar of the Community
Canada
864 Posts |
Thanks for trying to explain that to me. Sure wish I could make the image clearer and bigger. Not sure how to do that or if its possible. Very frustrating. Edited and added: OK trying once more, Picked 600 resolution so image is bigger. You can actually see the area darker/black where the metal is missing, though still not clear.  Edited by Dottir
08/26/2010 1:43 pm
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Pillar of the Community
Canada
864 Posts |
Ok, I'm still agitating about diagnosing what this rim problem is. I scanned the coin face up so the scanner lights would reflect towards that rim area, then I inverted the colors to be able to more clearly see outlines. You can definately see there is a problem, it looks "layered" when it should be a solid rim and collar, as in "layers of metal" and part of the "collaring?" process that somehow failed? See the layers of metal, looks like a few layers, plus the sort of elongated 7 shape with the separate layers underneath. The elongated 7 part is like that shape of absent metal that should be there but ? it's not. Then there are the layers. You can see these with a magnifying glass no problem. (I don't understand seeing "layers"! I should also mention that the flat outer edge/circumferance may have some splitting happening in parts travelling along the circumferance (called the edge?) sorry I can't scan that part.  I'd REALLY like to know what this problem is, what it might be called. If anyone can help diagnose this I'd be grateful, please and thank you! |
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Replies: 8 / Views: 1,664 |
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Posted 08/25/2010 2:30 pm
