Multiparameter chemical indicators to control the steam sterilization process, these are in the form of a paper strip with a perforation, on which it a blue test substance has been applied.

• Color transition from blue to dark

The class 4 chemical indicator reacts on two or more critical variables of steam sterilization process parameters water

The indicators are suitable for use in packages containing metal tools, porous materials, rubber, plastics and cotton underwear.

The response time of the indicator is controlled by precisely selected, a non-toxic chemical composition that is free of lead and other heavy metals.