1. Suitable in monitoring the effect of 121℃ (132℃) steam chemical indicator strip in hospitals and other health departments.

2. Put it into the center of the sterilizaing package.

3.When the color reaches to the "Standard Color" or deeper, It indicates  that card has the qualifications for sterilizing. If not, it is not to qualified.

4. Storage: Keep it away from acid-base, moist, lighting environment.