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<p>[QUOTE=&quot;foundinrolls, post: 534640, member: 4350&quot;]I took this from my post on another thread where i explained what a lamination error is:</p><p><br /></p><p>&nbsp;A lamination error starts when impurities or gas gets trapped inside the metal strip as it is being rolled out to create the strip used to make blanks that ultimately are used to make the planchets that are then used to strike coins.</p><p><br /></p><p>If the impurity is near the surface of the coin, a section can peel up or appear to be peeling from the surface of the coin. It can look like a jagged area of metal on the surface of the coin. That is what we usually refer to as a &quot;lamination error&quot;.</p><p><br /></p><p>If a planchet is so bad that the entire planchet splits before or after a coin is struck, we get what we call a &quot;split planchet&quot; error. Sometimes a coin can be struck on a full planchet that then splits into two halves with each half having the outer details the way they would appear on a normal coin. The inner portion would be rough and usually striated as that is how the inside of a planchet looks due to the process used to roll the metal into strips. Also, in the case of a &quot;split planchet&quot; error that splits after the strike, we can usually see some of the details of the coin in the striated part of the metal that is imparted by the striking of the coin. The inner part of the planchet is actually effected by the strike so a ghostly image of the coins detail is seen.</p><p><br /></p><p>It gets more complicated with a planchet that splits in two before the strike. The resulting coin can be weakly struck on one side and still somewhat &quot;striated&quot; on the other side but sometimes more details appear.</p><p><br /></p><p>When we deal with coins that have plating that is compromised or missing, we describe them as plating errors. So if the actual plating is peeling, we wouldn&#039;t usually call that a lamination error.</p><p><br /></p><p>If on the other hand, a plated cent should be struck on a planchet that is indeed suffering from the effects of an interior gas bubble or an interior impurity. We could see a lamination error on a plated coin.</p><p><br /></p><p>That should not be confused with the little bubbles on the surface caused by corrosion that is taking place under the copper plating.</p><p><br /></p><p>Without better pictures, I can&#039;t tell if the coin at the beginning of the thread exhibits effects of damage or corrosion or if it does actually have a lamination error.[/QUOTE]</p><p><br /></p>

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