The proof that an instrument pack has been sterilized is achieved by using a?

The proof that an instrument pack has been sterilized is achieved by using a sterilization indicator. Sterilization indicators are devices that are placed inside the sterilization pack and change color or appearance when exposed to the sterilization process. This provides an indication that the instruments have been properly sterilized and are safe for use. Different types of sterilization indicators include chemical indicators, biological indicators, and mechanical/physical indicators.