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US Mint Video On Proof Coin Production

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Bump111's Avatar
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 Posted 09/14/2021  09:01 am Show Profile   Bookmark this topic Add Bump111 to your friends list Get a Link to this Message Number of Subscribers
Apologies if this has been posted before. A quick overview on proof coin production.

LZMAY-53a-A
"Nummi rari mira sunt, si sumptus ferre potes." - Christophorus filius Scotiae
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sel_69l's Avatar
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 Posted 09/14/2021  09:34 am  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
There ya go!
They are using good old soap 'n water before burnishing the blanks.

Another downer for proof cameo, is that some of the very sharp design detail is lost in order to produce the cameo effect.
That is why I prefer a perfectly struck business strike in MS-70. Amongst other things, they are much rarer than PF-70 coins.

Interesting to see how the rimming is achieved.
Thomas Simon, with his Petition Crowns, in a similar process, used parallel lettered bars to roll his petition statement onto the edge of the coin.
Edited by sel_69l
09/14/2021 09:41 am
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jbuck's Avatar
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 Posted 09/14/2021  10:19 am  Show Profile   Bookmark this reply Add Bump111 to your friends list Get a Link to this Reply

Quote:
They are using good old soap 'n water before burnishing the blanks.


My thoughts, too. Thinking this is where we get our milk spots - incomplete rinsing and drying.
"Nummi rari mira sunt, si sumptus ferre potes." - Christophorus filius Scotiae
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 Posted 09/14/2021  10:43 am  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply

Quote:
Thinking this is where we get our milk spots - incomplete rinsing and drying.
The residue is being pressed into the coin under extreme heat and pressure.
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Conder101's Avatar
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 Posted 09/14/2021  11:32 am  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply

Quote:
They are using good old soap 'n water before burnishing the blanks.

"And other cleaning agents."
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 Posted 09/14/2021  3:36 pm  Show Profile   Bookmark this reply Add PlumCrazy814 to your friends list Get a Link to this Reply
it never gets old
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