I'm new to collecting and am confused about what people mean when talking about lamination errors. I just found this 1973 S penny and was wondering if this is an example. Thanks for any help
Not a lamination. Finned rim. Pressure high enough and possible a slight offsetting of the die allows metal to squeeze up between the neck of the die and the collar. Forms a raised "fin" of metal along the edge of the coin on top if the rim.
Lamination errors are primarily found on clad coins. The 1973 penny in your example is a solid coin made from the same metal throughout (Brass - 95% copper, 5% zinc)
Maybe those are usually the ones I notice. Are lamination errors more frequent among non-clad coins than clad coins?
Maybe what you're thinking of is clad plating or copper plating issues which is different than laminations. By definition laminations are a defect in the metal that is present before the minting process.