Unstruck planchet

An unstruck planchet is a blank coin that has not been struck by a die, resulting in a coin that has no design or markings. This type of error can occur during the manufacturing process when a planchet is not properly fed into the coin press or when a planchet is not struck with enough force to leave an impression. Unstruck planchet errors can also occur when a foreign object, such as a piece of debris, becomes lodged in the coin press and prevents a planchet from being struck properly.

Unstruck planchet errors can also occur when the metal used to make the planchet is improperly mixed or when the planchet is not properly annealed. Annealing is the process of heating and cooling the metal to improve its properties, and if the planchet is not annealed properly, it can become too hard or brittle, which can lead to errors during the striking process.

Unstruck planchet errors can be classified into two categories:

• Type one errors occur when the planchet is not fed into the coin press and does not receive a design or markings.
• Type two errors occur when the planchet is fed into the coin press and is struck with enough force to leave an impression, but the impression is weak or incomplete.

Type one errors are more rare and valuable than type two errors because they are completely blank and have no design or markings. Type two errors are less valuable because they still have some markings or design, but they are incomplete or weak.