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US Mint Video On Proof Coin Production

 
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Author Previous TopicReplies: 7 / Views: 172Next Topic  
Pillar of the Community
United States
1925 Posts
 Posted 09/14/2021  09:01 am Show Profile   Bookmark this topic Add Bump111 to your friends list Get a Link to this Message
Apologies if this has been posted before. A quick overview on proof coin production.

LZMAY-53a-A
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Australia
18964 Posts
 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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United States
103710 Posts
Pillar of the Community
United States
1925 Posts
 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.
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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.
Bedrock of the Community
United States
17483 Posts
 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."
Gary Schmidt
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United States
409 Posts
 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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