This product is a chemical indicator tape specially designed for pressure steam sterilization, with a long strip structure. The surface of the indicator tape contains chemical indicators that undergo chemical changes, accompanied by color changes, from light yellow to brown or black. The degree of its color is closely related to the humidity, temperature, and duration of the steam. If the color of the indicator tape does not change or the discoloration is lighter than the standard color, the surface has not reached the specified sterilization temperature and time.