The thin planchet consists of incomplete reeding. This coin was struck on a Sacagawea dollar planchet. A lamination flaw is a planchet defect that results from metal impurities or internal stresses. The Barbadian dollar coins are now minted in a plated-steel planchet first issued in 2007. The 1982 nickel dollar exists on a rolled thin planchet. An older word for planchet is flan. When a coin is struck, the planchet is not heated. Strike errors occur when the planchet is struck. After striking, it becomes a coin and is no longer a planchet. The preparation of the flan or planchet has varied over the years. A much rarer error is a denomination struck on a foreign planchet. Occasionally, a planchet will escape the mint without having been struck. Overdates, mules, brockage, double denomination, and struck on the wrong planchet errors are often valuable. Others attribute these marks to surfacing tools used as a part of planchet preparation. Finally, a round planchet with an eleven-sided inner border was chosen for the smaller dollar.