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 Replies: 13 / Views: 5,771 |
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Valued Member
United States
362 Posts |
Is there any other way besides weighing them to tell if they're brass plated?  |
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Pillar of the Community
United States
3656 Posts |
I think when it is Brass the coin is kind of greenish and also there is a difference in the weight of the coin (though I am not sure what it is). If you can weigh it so when the experts see your post they will have more information to work with.
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Valued Member
 United States
362 Posts |
Thank you CoinCents. My camera didn't get the color very well
but it looks yellowish/greenish. I don't have a scale, but I believe
it's 2.52 is a normal weight and the brass plated is 2.50 if I'm correct.
I'm wondering if this is another way besides weighing them to tell?
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Valued Member
United States
362 Posts |
I took a picture with the three I have this color with the other coins to compare the color. There is a fourth there as well but looks a bit different Maybe because it's a tad dirty.. But the ones I have appear to be more on the greenish/yellowish side.  |
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Moderator
 United States
56855 Posts |
Can't tell by weighting them. A brass plate will have a yellow look to them.Type brass plate in the search box upper left of page for info. John1  Edited by John1
03/23/2016 6:11 pm
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Bedrock of the Community
Australia
21788 Posts |
Brass plating instead of copper plating makes good metallurgical sense to me.
Brass is an alloy of copper and zinc, which should be ideal for bonding to a zinc core.
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Pillar of the Community
United States
3330 Posts |
"Normal" weight can be + or - 0.04g, it seems. When weighing cents I will regularly see that much variation.
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Bedrock of the Community
United States
17884 Posts |
They can't be told by weight. The weight of the plating on a cent is about .05 grams. If the plating solution is so contaminated by zinc to result in a yellow brass 70/30 CU/Zn plating (and they would surely change the solution before it got that bad) would result in a reduction of the weight of the plating of .01 grams. When you consider the Weight Tolerance for the cent is +/- .1 grams or ten times as much, you can see that weight will not identify a brass plated cent. So all you can do is either make a judgement based on color, or use an XRF scanner to try and determine the zinc content of the plating (and hope it doesn't read through the plating and get confused by the zinc content of the core.). Then you have to decide how low the zinc content can be and still call it "brass". Since the plating is supposed to be pure copper, any zinc in the plating technically makes it "brass". But no one calls them brass plated until the color is noticeably different and there is no set zinc percentage at which that occurs. Edited by Conder101
03/23/2016 12:15 pm
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Moderator
United States
56855 Posts |
Mint tolerance for a cent is +/- .13 grams so weight will be a tough call. XRF is the way to go. John1 |
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Pillar of the Community
United States
3330 Posts |
Quote:
The weight of the plating on a cent is about .05 grams. I did not know this! Where did you find this information? Or perhaps you did not find it, but calculated it? |
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Bedrock of the Community
United States
62064 Posts |
If they were BU they would be collectable. Circulated examples are hard to prove that is what it really is. Ken Potter sells BU examples from time to time.
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Pillar of the Community
United States
2824 Posts |
1995-D Brass Plated Planchet Strike I know there are 1983, 1985-D, 1997, 1997-D & 1998 ken potters page on them http://koinpro.tripod.com/Brass.htmmint says possible on any date from 1983-1998 This one is a 1995-D question what is the weight or test for one? Pictures next a normal cent & weight below   Regular weights in more at 2.52  Brass Plated at 2.50  |
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Valued Member
United States
362 Posts |
Wow interesting! Thank you everyone for sharing your knowledge on this...
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Bedrock of the Community
United States
17884 Posts |
Quote:
I did not know this! Where did you find this information? Or perhaps you did not find it, but calculated it? Calculated |
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Replies: 13 / Views: 5,771 |
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Posted 03/23/2016 02:19 am
