2020 D Roosevelt Dime Improperly Annealed Planchet - Page 2

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Author	Replies: 25 / Views: 4,945	Page: of 2

Jim0815 Pillar of the Community United States 5239 Posts	Posted 02/03/2023 04:59 am John1, it's weight is 2.26 grams. Report this Post to the Staff
nickelsearcher Moderator United States 15435 Posts	Posted 02/03/2023 05:36 am That dime would be a challenge for me to attribute. Take a look at my other hobby ... http://www.jk-dk.art Report this Post to the Staff
Dearborn Moderator United States 96214 Posts	Posted 02/03/2023 07:28 am I still have questions about this one - Why does it appear like the coppery color is pealing up to expose the silver below? 1. In picture 4 (close up of the word DIME - looks like the top layer (Coppery color) is folded up and over itself away from the rim exposing the silver color 2. In picture 6 (Close up of 'ED ST') in between the D and S it appears to be bubbled up in 3 spots (judging from the lighting), and between the letters and the olive branch it looks like it is pealing up. 3. In picture 2 (full coin image of reverse) What is going on to the area by the bottom of the torch (bottom left? (it looks like a blister), and between the bottom of the oak branch and the M of DIME (same thing). Not saying it ain't an annealing thing, just have questions here. I hope if Mike shows up, he can answer some of my questions also. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Edited by Dearborn 02/03/2023 07:30 am Report this Post to the Staff
Jim0815 Pillar of the Community United States 5239 Posts	Posted 02/03/2023 07:49 am I have emailed Mr. Diamond. I hope that he can take the time to address all of the questions surrounding this coin. Report this Post to the Staff
Dearborn Moderator United States 96214 Posts	Posted 02/03/2023 08:35 am Thanks Jim. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
mikediamond Pillar of the Community United States 2737 Posts	Posted 02/03/2023 08:43 am In an improper annealing error, copper and nickel atoms segregate out, with the copper atoms usually migrating to the surface. Effects include those observed here, among which are peeling and "bubbling" of the surface copper. Error coin writer and researcher. Report this Post to the Staff
datadragon Pillar of the Community United States 1648 Posts	Posted 02/03/2023 08:43 am @Silviosi and others - As of 2014 so far - Fraunhofer studied replacing the current mechanical die blanking and on-site annealing with laser blanking and off-site bulk annealing. Currently, blanks are punched from coils of coinage strip, and the rough blanks are deburred and then annealed to soften, for formation of the raised rim on an upset machine, before being struck on a coinage press. Fraunhofer also studied retaining the on-site annealing but replacing the current die-blanking with laser blanking. Fraunhofer concluded that the laser blanking would not offer substantial savings compared to the current mechanical die blanking. Suggestions for additional examination include non-laser blanking alternatives, such as die-blanking with a "push-back station" that might be able to directly blank annealed material without distorting the blanks and cutting blanks using water jets. https://www.coinworld.com/news/us-c...-s-mint.html Edited by datadragon 02/03/2023 11:49 pm Report this Post to the Staff
Dearborn Moderator United States 96214 Posts	Posted 02/03/2023 08:49 am Quote: copper and nickel atoms segregate out, with the copper atoms usually migrating to the surface. Effects include those observed here, among which are peeling and "bubbling" of the surface copper. Ahh! , ok, that makes sense. Thanks Mike. I understand a little bit more.. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
Jim0815 Pillar of the Community United States 5239 Posts	Posted 02/03/2023 09:01 am Thank you, Mr. Diamond. Report this Post to the Staff
Petespockets55 Pillar of the Community United States 5775 Posts	Posted 02/04/2023 02:30 am Very interesting thread and coin. (This might explain a dime I found last year with small random areas of copper on the surface of both sides. Now to hunt it down and look more closely.) Words of encouragement are one of the major food groups. We need to consume them regularly to thrive and grow. Report this Post to the Staff
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