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Replies: 18 / Views: 3,710 |
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Pillar of the Community
2145 Posts |
While out in my shop today I tried to make a so called " Texas Cent" - mostly I was curious as to how the copper plating would fall off and leave just the zinc core. Well obviously I failed at the attempt - I ended up with enlarged cent, thin with loss of features, & the pattern/texture of the leather transferred to the coin -BUT the copper did not split and fall off like I've read on the forum before - it stretched right along with the zinc. Any thoughts or ideas on where I went wrong? If you give me any tips on how to proceed I'll try them out and post pictures of the results. Otherwise - the only thing I found out is that the copper plating didn't fall off when pounded between leather.  
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Moderator
 United States
54280 Posts |
Someone is going to come along and call this a "struck through".
Show your financial support of the Coin Community Family (click here)See my topic on Mexican Numismatic Medals (click here)
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Moderator
 United States
34397 Posts |
@raoth, maybe this sheild cent was minted on a copper planchet?  Seriously though, I'm not sure why the plating didn't crack on yours.
"If you climb a good tree, you get a push." -----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz
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Pillar of the Community
 2145 Posts |
Quote: this sheild cent was minted on a copper planchet? Yeah, that would be my luck  But no, 2.5 before, 2.5 after. EDIT - just wondering though, has anybody tried this too and actually experienced the copper plating fall off? Or do we just take is as such should happen?
Edited by Rothery 05/21/2021 6:31 pm
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Bedrock of the Community
United States
94367 Posts |
I've done this twice and had the plating fall off both times, but not without some effort.
Edited by Coinfrog 05/21/2021 6:42 pm
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Pillar of the Community
 2145 Posts |
Well, your method? I'de like to see if it really work/happens. I've see old chrome peel off of car bumpers but them days are long gone
Edited by Rothery 05/21/2021 7:13 pm
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Pillar of the Community
 United States
4618 Posts |
This happens all of the time when I leave a zinc cent in my back pocket and sit down. I've been meaning to get more exercise and stuff, it's just that hiding in the house for the last 14 months and a major Haagen-Dazs addiction has caused my "Middle Age Spread" to turn into a "Old Man's Pondarosa Ranch" kind of thing.
I've always wanted to try this! If I do, I'll let you know how mine comes out.
Have you weighed the coin? Maybe Spence is right!
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!! 
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Pillar of the Community
 2145 Posts |
Quote: But no, 2.5 before, 2.5 after.
Indeed I did - a few post upwards Quote: I've been meaning to get more exercise and stuff, it's just that hiding in the house for the last 14 months BuTT, (pun intended) the real "Yokozuna" could not have done the "squish" - He'd be doing the "Squash" 
Edited by Rothery 05/21/2021 8:45 pm
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Pillar of the Community
 United States
4618 Posts |
Here's my all time favorite Yokozuna. Takanohana was the 65th Japanese Sumo Yokozuna (Grand Champion) wrestler. I spent a week at Disney World watching the Japanese channel with no English translation. Each night my wife and I would stay glued to the TV to see who would win. I picked a favorite and she pick another wrestler as her favorite. As it turned out, the wrestlers we picked WERE BOTH the current Yokozuna at that time. We've been watching Sumo for years now, and so... my CCF member name! 
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!! 
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Pillar of the Community
 United States
4618 Posts |
I just notice that the coin I currently use as my avatar is kind of like a mint made "Texas Cent." It doesn't have any split or missing plating as a result of a large broad strike. I was surprised that the plating was intact on this coin. Maybe some copper plating just has higher tinsile strength that others.  Edit: Spelling. (English is hard!)
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!! 
Edited by Yokozuna 05/21/2021 9:55 pm
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Pillar of the Community
United States
7005 Posts |
Are you using a right or left-handed hammer?
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Pillar of the Community
 2145 Posts |
Quote: Are you using a right or left-handed hammer? At the time I was slinging a "Mini Sledge" with my left hand - Now I know why I can't be happy or go bowling tonight - thanks for pointing that out!
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Pillar of the Community
 United States
4618 Posts |
Greasy Fingers said... Quote: Are you using a right or left-handed hammer?  I just shot Coca-ColaŽ Dark Blend with Coffee out of my nose.
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!! 
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Valued Member
United States
221 Posts |
I suspect the issue is adhesion related, but I would not be surprised if copper plating thickness plays a role. Or the purity of the copper itself, if its malleability is affected.
I don't know a lot about the details of plating copper over zinc (a barrel plating method, specifically), but in the world of metal plating, there are some combinations which are known to have weak adhesion or be sensitive to the process conditions. A lot of times, the problem is actually in the preceding step where the substrate is prepped for the next coating.
While one can plate metals as part of a high school experiment, plating on a large scale and keeping tight quality control is not trivial at all. When most of us consider errors on coins, we are thinking of mechanical abnormalities or occasionally alloy/heat treatment abnormalities. I bet the plating line has problems, too, and those may not be as immediately obvious for QC.
Maybe different years are affected more? The processing of the planchets had to change over time, otherwise, those blasted blisters would be a bigger problem on the later crops of zincolns.
To put if another way, Rothery, your experiment may have failed due to you destroying an excellently plated cent!
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Bedrock of the Community
United States
20753 Posts |
Massive waist of time and money. Sure wish people that do this would simply send the things to me.
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Moderator
 Canada
10456 Posts |
Dedicated error collectors waste a lot of time and money, altering coins of minimal value, because it's important to understand all the different things that could be done with a coin. We do this to learn and educate other collectors so they won't spend good money chasing bad coins.
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Replies: 18 / Views: 3,710 |