What is a "Sintered Planchet"?

[BankNote1]

I saw a coin in a coin holder with "Sintered Planchet" on the label. Does anyone know what a sintered planchet is???

[keithdagen]

Is that how ACG spells "centered"?

[Wihlborg]

BankNote1,

A Sintered Planchet is when a planchet is covered by copper dust by mistake. This can happen when the planchets go through the annealing process.

 

John

[BankNote1]

John- Thanks. This was a new one on me!

[Wihlborg]

Your welcome BankNote1!

 

I am not really into errors but have seen some sintered planchet errors on both nickels and quarters at coin shows.

 

They sort of look like the coin was struck on a copper planchet, but it's really just copper dust that attached itself to the outside of the planchet during the annealing process.

 

John

 

[Beijim]

Ba-dum-dum. Tinggggg! Good one, Keith.

 

Beijim

 

[Please Delete-migration]

Here is a little article on it (about a third of the way down the page). They are also explain "Copper Wash":

 

http://www.money.org/yn/ynnewsletter200235.html

 

and here is a coin of mine which I found in change and that I have been told is probably one (albeit minor):

 

http://thestujoecollection.com/otherpic/sba80.jpg