What do you call this type of error? At first glance I thought someone had damaged this penny, but the bubbles are under the writing not on top. Is this cause by gas being trapped or to much heat of some sort?
This is yet another example of the inferior production of zinc cents: 8 years later the contractors hired by the Mint still had not gotten the proper production procedure ironed out. The first zincs were begun in July 1982, and many had copper plating imperfections…just like this one. Oh, and BTW, there is no added value for this production defect…imo…Spark
A lot of collectors don't like these blistered cents. And a majority think that they are gonna explode and have zinc rot in no time. It is simply not true. Also, most think that a coin with blisters can't grade very high, and shouldn't be Gem or above, also not true. There are a few years that these blistered coins hold the top pop, MS67 and above. PS, 1990D is not one of them.
It’s all plating blisters. The coin is zinc and a very thin layer of copper covers the coin. It’s terrible what the mint is producing today and this is quite common.
Terrible. That zinker's a real stinker. They'd be better off just making them out of one material. One yeners in Japan hold up 100% better compared to the 83' and newer US Penny. I don't think the two metal's stay together well over the test of time.
I have never had a post 82 cent degrade when in a controlled environment. It is everyday use that degrades the coins, cup holders, ground, etc.
Way to prove me wrong Robec. These usually have minimal blisters and are quite smooth. Nice looking Lincoln.
I only had GI Joe’s set to use as a reference. Too bad he sold his set a few years ago. In looking at the rest of his set, the 1991-D was almost void of the blisters…..there were only a very few and those weren’t too prominent. From 1992 on all were clean. I was as surprised as you to see them as late as 1990.
The blisters will come out over the time. In order to preserve the environement must be stable. 90%+ of collector do not have those stable environements. the cooper and the zinc is suppose to oxide if are not inhibited. IMHO collecting those coins is wrong way to go long term if no steps was put in place. This option it is pricely.
So how does a collector create a stable environment? How much do you say it would cost to do so? Because I really want to preserve my bubbled and blistered Cents!
I can not answer of your premises. I will tell my location, the cost and what I done. I made a room 4x6x8 fire proof and anti EMF, submarine air puricator, 20% sable humidity and the temperature ar stable 15 Deg. The light I use is difused incandescent. In this room I keep except the gold, the coins, stamps, banknotes and some Pictures. Then I have other 3 safe all with air purifyers, 15 Deg and 20% humidity. In an room at 15 Deg, 20% humidity. Here I have more pictures, furniture artifacts, porcelain and alot of jade artifacts. All cost me around 20K. By my studies in my Lab I find that the plated coins will stay stable at 15 Deg and 20% humidity, not developing any form of sulfate, sulfide, and all the oxidation inhibite. In the begining maybe some tonning will develop, but after short period will stop because will miss any activator. For me was worth,, is up to you to decide how to do. Do not forgot: any coin will can have traces or S, human secretions, traces of oills, slabed or 2x2 H, O, C, N, S. or also fungus. 12 to 15 Deg it is any OR temperature for stop any chemical reactions. Hope help. Silvio
IMHO if the Mint will start to well polish the blancs (will never happened) the blisters will almost go out.
