... performance standards of European, International and ISO approved. All the inks are the original development exclusively for our sterilization control systems, autoclave tape, bowie & dick test pack, multi variable steam indicator class 4 - class 6, helix control test pack, indicator labels, autoclave indicator tape, indicator label gun, container seals, sterilization equipments, sterilization control, sterilization monitoring, bowie dick test, infection control, cssd, steam sterilization, as non-toxic, environmentally safe for usage and disposal. Our inks do not contain and lead or other heavy metal.