Gammatex irradiation sterilisation indicators are Class 1 process indicators, manufactured in compliance with ISO 11140-1:2005 "Sterilisation of health care products - Chemical indicators".

Gammatex gamma sterilisation indicators undergo a simple yellow to red colour change when exposed to gamma radiation.

They are used in the industry as qualitative process indicators for the gamma irradiation sterilisation process.

Processed labels can also be retained as part of a quality control validation record.