Question: What does a burnished planchet look like

keez

Is a burnished planchet the same thing as a satin finish?

Gemineye

To the Mint, "burnishing" means that the unstruck
planchets were placed into a drum containing tiny metal
pellets along with a liquid medium. This entire mixture was
then tumbled. The blank planchets were scoured of any surface
contaminants during this operation. They were also thoroughly
pockmarked by the rough contact with the tiny metal "BB's"
being used. This type of roughened surface increases metal
flow during the striking operation, producing a
better-finished product. Modern Proof blanks are also
routinely subjected to a pre-strike burnishing.
from coin world article

Russ

<< <i>Is a burnished planchet the same thing as a satin finish? >>



Not the same thing. Burnishing is normally considered polishing of the planchets as part of preparation before striking.

Russ, NCNE

Gemineye

<< <i>

<< <i>Is a burnished planchet the same thing as a satin finish? >>



Not the same thing. Burnishing is normally considered polishing of the planchets as part of preparation before striking.

Russ, NCNE >>


That's tough to polish each one ....individually...........!!!!!!

LALASD4

keez

It will be interesting to compare this new uncirc. burnished one with the regular uncirc. bullion american eagle.

cladking

Burnishing is just a specific type of polishing and has been used for many coins at the
mint since 1986. It probably hasn't been used for all proofs but such information is diff-
icult to come by. It is used for some mint set coins and other "special" purposes. It is
said to have been used on some of the post 1990 souvenir mint sets.

Mint state clad struck on burnished planchets has a very smooth and rich texture. I used
to call it satiny but now this can be confused with the term for coins struck for '05 and later
mint set coins struck from chrome plated dies.