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All Forums Category: General Numismatic Forums Forum: Coin Photography, Image Editing, and Related Software

What Are These Little Bubbles?

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Author Previous TopicReplies: 3 / Views: 1,462Next Topic  
andywoj00
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 Posted 08/23/2016  8:12 pm Show Profile   Bookmark this topic Add andywoj00 to your friends list Get a Link to this Message Number of Subscribers
I would guess some sort of plating issue or contamination under the plating. Please educate me and thanks.


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silverwolf
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 Posted 08/23/2016  8:14 pm  Show Profile   Bookmark this reply Add silverwolf to your friends list Get a Link to this Reply
i believe they are gas bubbles, formed in the manufacturing process..
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Fuzzy317
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 Posted 08/23/2016  8:27 pm  Show Profile   Bookmark this reply Add Fuzzy317 to your friends list Get a Link to this Reply
could be bubbles caused by zinc rot
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John1
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 Posted 08/24/2016  04:53 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
They are trapped gas bubbles not zinc rot (yet). It happens during the copper plating process. Contaminants get between the planchet and the plating.
John1
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All Forums Category: General Numismatic Forums Forum: Coin Photography, Image Editing, and Related Software



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