1983 Cent Gas Bubbles Or Blistered Plating. Plus Question About Corrosion.

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Author	Replies: 7 / Views: 4,428
noobz Valued Member United States 64 Posts	Posted 08/22/2020 08:55 am Any idea of how to distinguish between the gas bubbles and the blistered plating. 1982 and earlier coins (3.1 gr.) usually have gas bubbles as per my research. My coin (1983) weight is 2.49 gr. It is extremely bubbly on both sides. I doubt it could take only 0.01 gr. weight of the coin (only if it is fat planchet or some). That is why I wonder if there is a possibility that it is printed on the wrong planchet. for the 1983 coins it is a known planchet error. Another concern is to tell the difference between the poped bubbles on the other coins and simple corrosion. Refer to second image. Thanks. Edited by noobz 08/22/2020 10:04 am Report this Post to the Staff

CoinHunter17 Pillar of the Community United States 1008 Posts	Posted 08/22/2020 10:04 am The 2nd image is from your other post. Try renaming the other pic of this coin. Report this Post to the Staff
noobz Valued Member United States 64 Posts	Posted 08/22/2020 10:07 am Other post had wrong uploded image. I corrected that. Report this Post to the Staff
coin searching Valued Member United States 182 Posts	Posted 08/22/2020 10:09 am bubbles or blistering should not effect the weight much so if the coin is struck with copper planchet, it should weight close the 3.1g. Here is what I found regarding gas bubbles and blister plating. https://www.coinworld.com/news/prec...es-vary.html Report this Post to the Staff
noobz Valued Member United States 64 Posts	Posted 08/22/2020 10:41 am Thanks for the link! It is very helpful one. Still living me with one question: reading the article I understand that the "Corrosion domes" are result of contaminants trapped beneath or penetrating the surface of aluminum, plated zinc, and plated steel coins can react with surrounding metal to form an expanding front of spongy, corroded metal. The resulting solid dome will superficially resemble a hollow plating blister or occluded gas bubble. In many cases the corroded metal bursts through and may fall out, leaving a crater. So how to tell the difference? If you ask me why - because corrosion is a damage, but blisters and bubbles are the mint errors. Correct me if I am wrong. Report this Post to the Staff
HGK3 Pillar of the Community United States 573 Posts	Posted 08/22/2020 4:48 pm In zinc cored Lincoln cents, blisters and plating bubbles are the same thing. As you noted, particles caught in between the copper plating and the zinc core, caused by improperly washing the zinc planchet, react and cause both the copper plating to bubble up and the zinc core to corrode. When the copper bubble bursts or breaks, the existing corrosion of the zinc core is now visible, but it was already there all along and the bubble/blister is evidence of this. Although they technically are the result of mistakes in the coin making process, blisters and plating bubbles as a result of this process are not generally considered to be mint errors. Report this Post to the Staff
noobz Valued Member United States 64 Posts	Posted 08/28/2020 10:37 pm Thanks. I still think it looks cool and I keep it for now Report this Post to the Staff
noobz Valued Member United States 64 Posts	Posted 08/28/2020 10:40 pm I do not know why this pictures jumping around on this forum Here are original one I put before Report this Post to the Staff
	Replies: 7 / Views: 4,428

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