Lincoln's Gas Bubbles

Show us your best or worst. I thought this was an interesting pattern. The anomaly is on the same coin. Let's make it a little more challenging, 2015 Lincoln's only please.

 

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"Tiny bubbles in the rain....."

Chris

 

Gas bubbles? I recommend Gaviscon.

 

That's a beauty! No kidding. If the coin is "nothing" to you, IMO you could send it to Susan Miller at the ANA with a note that it is for the teaching set. She'll probably get it encapsulated by NGC to keep it nice. I want it to

 

sorry, all those i find get dumped back at the bank...

 

Well, its your coin.

 

Just a notice to coin collectors that the 2015 run will have a number of zinc-rot cents over and above those that would zinc-rot if there weren't these bubbles. But with the number of cents coined last year, who cares?

 

Abe's got gas?

I'd recommend TUMS

 

Yeah, I guess you are right, who cares. Back in the 1890's when some kid carved up a circulated 1793 Large Chain cent because: Who Cares? I'm one of those "sappy" old guys that cares about all coins - especially those I perceive as useful for more than a piece of bubble gum (those were the days - 1c gum and a 25c Saturday movie. Just saying...

One day very many zinc cents will show "rot." This coin is not one of them - Yet. It is a great example of a BU cent with "occluded gas bubbles." Thus, in a seminar, it would fall into the "Characteristics found on genuine coins" category. Additionally, many "new" students in an authentication seminar would guess the coin was a "cast" counterfeit if asked if were real (because of the raised, round, bubbles that are often found on fakes). That is why IMO it is a great teaching coin. Perhaps, I'll get one like it in change and can follow my own suggestion. This one is a beauty!

 

[QUOTE="Insider, post: 2337895, member: 24314"It is a great example of a BU cent with "occluded gas bubbles." [/QUOTE]

http://lincolncentsonline.com/miscellaneous.html and http://www.error-ref.com/gas-bubbles/ and http://www.error-ref.com/gas-bubbles/

This I would say is blistered plating and not occluded gas bubbles. It seems that although both result in raised bubbles the process to create them is somewhat different

I don't see this as valuable. Though teaching people that this is not the same characteristic as seen on cast counterfeits could be valuable. If they think this is same, it's good to show them that this is a characteristic of poorly made zincolns.

 

Now please put your TEACHING HAT ON for my benefit.

The seminar instructors/graders I know have taught OG - forever. I am ignorant about blistered plating. Is this a new term from the "error guys?" What causes it? Is there a simple way to tell the difference? TYIA

 

Read the links I posted.

 

Say What? Dah..Thanks

 

That's why Abe's wife always called him Old Whistle Britches

 

Not convinced. First link so, so. I have been told that Mike Diamond runs the second site and he is a very informed error guy. So for now, I'll need to find out for myself.

The causes of this type of error was described to me many years before clad coins existed. Mike covers that. Nevertheless, I never heard the term "blistered plating" in the early 1980's either. So all this terminology must have resulted from new research. I have not seen this effect on a clad blank. I need a better explanation! None of the genuine coins I've seen with this characteristic has been heated OUTSIDE the mint - including the OP's coin. IMO, when genuine, it has to occur during striking. If the error guys want to call it "Blistered Plating" that's OK with me. I wish to know what caused the blister. Trapped gas in the clad layer that was heated during striking would = occluded gas? Yes? No?

 

Well, I believe the blistering was called 'orange-peel effect' by a lot of people before kind of dropping that term.

Also, in an article by Ken Potter on numismaster.com, he says the cause of the blistering is "The cause of this error type is contamination of the electrolyte used in the barrel plating process that in time causes a condition known as “foaming.” At this point anti-foaming agents need to be added to the solution or it needs to be replaced but invariably a number of coins exhibiting this condition get out of the Mint every year."

So basically these errors, which can look like each other, are caused by different processes.

 

Please don't take this as a personal attack, as I appreciate your information and links. Let's call it a helpful clarification.

The view above by a lot of people is a completely ignorant use of the expression "Orange Peel." Blistering LOOKS NOTHING LIKE the surface of an orange! Blistering is an ideal term for the characteristic you are educating me about. In reality, "Orange Peel" is a term that has been used for many decades by professional numismatists to describe the "blocky, layered appearance" found mostly on the mirror surface of many Proof gold coins.

Thanks for this lead...Interesting reason for this characteristic that I shall follow up. Certainly tens of thousands of these coins get out each year.

 

orange peel effect is a characteristic of die deterioration, occluded gas bubbles are found on solid alloy coins, plating blisters whether hollow or solid are found on plated coins...

 

The above subject coin was found in a roll like this one. All 50 coins were 2015's and looked mint uncirculated.

 

I'm trying to contact Susan via e-mail. I'll let you know if I hear back from her.