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 Replies: 14 / Views: 2,266 |
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Valued Member
Australia
318 Posts |
Found a 2009 50 cent piece in a coin machine bag last week, and wonder how the coloration was applied to it - there's a quite striking sheen that the scanner doesn't show very well, like a Titanium coating that varies according to the angle of lighting; sort of like those 2-tone paint jobs. Looks quite pretty, actually. I can detect a corroded surface to the coin, so guess it is some sort of corrosive. Curious to know what it may be.  Any chemists out there?   |
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Valued Member
Canada
470 Posts |
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Pillar of the Community
Australia
4411 Posts |
Thats a weird one. Definitely PMD and not even close to UNC. |
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Valued Member
 Australia
318 Posts |
Quote:looks like a weak strike and or Struck Through Grease.Appears to be uncirculated. I'd rule that out, as the coloring is different to a standard 50c; this is a light golden-yellow which varies in intensity as you move it around in the light, and also the corroded look - most noticeable in the word Australia. Love to know how it was done. It's certainly not spray paint. You're right enworb, it is not UNC, but would've been a fairly good grade prior to its (mis)treatment. |
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Pillar of the Community
Australia
4411 Posts |
I would imagine some acids would eat away at it like that and be able to leave some funky staining. That would be my first choice.
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Valued Member
Canada
470 Posts |
Bathe the coin in acetone or xylene for 48 hrs or if you're uncomfortable with those methods boil small amounts of distilled water and bathe 5 or ten times.
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Pillar of the Community
Australia
674 Posts |
Looks to me like it has been "glass beaded'- smooth spot at the bottom where it was held.!! |
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Pillar of the Community
Australia
4411 Posts |
What would acetone or xylene hope to achieve?
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Pillar of the Community
Australia
1041 Posts |
looks like its been rolling down a sandy river in the floods the way the edges are round I ahd a coin that we found in the brisbane river after the flood and looked like that fast flowing water
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Pillar of the Community
Australia
1607 Posts |
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Valued Member
Canada
470 Posts |
What would acetone or xylene hope to achieve? Quote:
to determine if the yellow/gold tint or toning is within the alloy or residue/oils from, perhaps an air compressor. |
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Valued Member
Australia
251 Posts |
Edited by Candace
03/05/2013 10:12 pm
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Pillar of the Community
Australia
1607 Posts |
Looks to me like it been on a rough bitumen road or cement & been run over heaps by vehicles Candice,sorry to say.
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Valued Member
Australia
251 Posts |
Mmm I dont agree as I lived in tarcutta which is all bitumen the whole place is virtually one big truck stop, iv seen road kill before this dose not coincide, the high rim for one.
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Valued Member
Canada
470 Posts |
@ Candace
Yours appears to be heavily circulated, - what we North American call a pocket piece.
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Replies: 14 / Views: 2,266 |
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Posted 02/27/2013 05:29 am
