Sterilization indicator tapes

Steam (autoclave) sterilization indicator. The tapes indicate that the material has undergone a sterilization process.

191222:
The tape is marked with the word "CONTAMINATED," and once it has been autoclaved, the word "STERILIZED" appears.

191223:
The tape is marked with the following terms: "Batch," "Con." (control), and "Date."
On unused tape, the word "Sterilized" is visible; however, once the autoclave process is performed, the word "Sterilized" becomes much more pronounced.