Questionable 1930 Error Penny

Seriously, who needs an encylopedia or any kind of reference material with this community? You people are awesome? I shant never use the term delamination again. Lamination only from here on out, at least until I use the term delamination again ... DOH!

So, I'm still a bit confused as to what this might be. I'm also confused about the term solid-alloy. Isn't that an oxymoron?

So the blanks are multiple rolls of metal, potentially with impurities between the rolls? I wonder why that must be.

I call this a "lamination flaw." I don't like "delamination" because it implies an opposite result being more common.

An alloy, in this case, is several metals, primarily copper, being combined into the stock from which the coin was struck. Yes, an alloy can be a very solid metallic object.
The metal, as an alloy, was rolled to proper thickness (from a single sheet, not multiple) and blanks were then punched out of it to create the beginnings of coins. Mixing molten metals does not always create a completely homogenous blend. When it doesn't, then you find "lamination flaws."




That can create its own issues, but is not a common occurrence at all. Lamination problems are not caused by foreign debris.

Look at it this way: an alloy takes multiple metals, melted down and mixed together to form a single liquid. This is the same thing as pouring milk into your coffee and mixing it. This is cooled, rolled and cut into blanks before coining. Usually it is just a single homogeneous thing but sometimes it isn't mixed properly, perhaps there is a small part where the metals were not totally combined.

Right now the only circulation coin that is a simple alloy is the nickel, 75% copper mixed with 25% nickel. Pennies before mid-year 1982 were an alloy of 95% copper and 5% other metals (depending on the year). Dimes, Quarters, halves and dollars were an alloy of 90% silver and 10% copper for much of the time prior to 1964 although the ratio of silver to copper varied in the 18th and 19th centuries. Gold coins were an alloy of gold and copper.

Clad coins have multiple layers, some of the layers are alloys themselves. The current dime, quarter and half as well as the Ike and SBA dollars are clads of 75% copper and 25% nickel (same as the nickel coin) surrounding a core of straight copper. The "Golden Dollar" series are a clad as well, with a copper core and outer surfaces a variety of metals including copper and zinc.

Plated coins have a core of either an alloy or straight metal coated by a plating to provide a color or protection against the elements. The current penny (since 1982) is a zinc core plated by copper, and the 1943 penny was steel plated by zinc. Most small Canadian coins are also plated with a steel core.