Die damage is a type of error that occurs when a foreign object is placed between the die and the planchet during the minting process. When solid fragments enter the beating chamber while the press is in operation, they can cause scratches or dents in the die, which will then be reflected in the coins minted with that die. It is essential for the assistant to identify any damage to the die and replace it promptly to avoid further damage to the coins.
Scratches and dents differ from die cracks, which are caused by wear and tear of the die over time. Scratches and dents have a specific shape, while die cracks have a more irregular shape. The error may progress in both cases.