What is the deal with this "Yellow Jacket" cent?

You should research that, there are different ones. its a moot point. but coating and substrate can be analyzed non destructive. your assumption that they take a guess and charge people 40$ to grade is quite laughable.

 

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It's not laughable at all. The color is very distinct. But at the same time the color and tone can be manipulated.
There are no absolutes in this. TPG's do make mistakes. An XRF is not the answer.

 

It is laughable. period. they have tools to determine the content.
surface and substrate. they have standards. its like them guessing its .999 gold, they know exactly what is in the metal, its not a guess. this is just one on the market. im not buying one.
Handheld HDXRF analyzers and benchtop HDXRF analyzers offer:

• Multi-element detection compliant with ASTM F2853-10, the CPSIA-approved method for the quantification of lead in substrates and coatings
• Limits of detection well below CPSIA mandates, so you can be confident in the results
• An analysis area of 1-mm for testing of small features and irregular shapes
• Separate and simultaneous analysis of coating and substrate
• Rapid, precise screening to allow for more testing in less time
• Sensitivity and accuracy of wet chemistry without destroying the product

 

Besides the coin...I'm glad I read this thread. Just realized that my kids' swing set has carpenter bees in it.

 

Time to make them go away.

 

Oh, I plan to as soon as I get home.

 

Not trying to be argumentative (Ok, maybe a little) but I’ve used lots of analytical data including XRF. It’s important to have a basic understanding of how these methods work, so you can specify the correct test and know how the limitations could affect your data. There are some guys on CT that know a heck of a lot more about material analysis and can explain it a lot better, but I feel my previous posts provide a good general overview of why XRF isn’t a good analytical method for verifying brass plated cents. XRF works really well, unfortunately this would be one of the rare cases where it doesn't

Also, don’t assume that people at the TPG are experts on analytical techniques. I work with cross functional engineering teams and if someone doesn’t regularly work with the data, they don’t always know about the limitation. It isn’t unreasonable to think that ANACS could have just done a point and shoot with a handheld XRF, saw Zn, and said it’s brass, not fully understanding where the Zn is coming from.

All that being said, I still think @JCro57 coin is brass plated. I’m just uncomfortable with the verification.

Hope that explanation helps

 

I did my research on that coin before this thread came up, its on my ebay watch list. Im still considering buying it. I don't think it is brass plated, I read it was copper plated and the zink mixed with the copper due to temperature of the adhesion/ annealing. we are assuming they used XRF, my point was we are not giving them enough credit as a professional grading company. every company is subject to human mistakes.

 

Made me laugh but that wasn't what I had in mind.

 

Be prepared those are ruthless if you spend a week end being relentless the Queen will come out. When you get her They will leave. And it will be easy to control. The racket is usually the right size you can kill about 30 in 5 minutes. When it's bad.
Good luck! They are true Bass Tards

 

It was rainy this afternoon so I didn't get to it. Hoping tomorrow I will get in there and start poisoning their little holes.

 

I don't believe zinc cents are annealed

 

Reviving an old thread Joe. And the poster you quoted hasn't been on CT for almost a year now

 

Yeah. Sometimes it's for others' benefit as well.
Hope everything is well with you. Been a while!