Indicator Inks are utilized to manufacture Chemical Indicators (CIs) that demonstrate when items have been exposed to a given sterilization process. The CIs manufactured using True Indicating's Inks change from an initial color to a signal color once processed; the color is irreversible, and provides end users with assurance that the item(s) have been properly processed prior to use. CIs are used by healthcare and dental facilities, in the industrial setting including medical device manufacturers, pharmaceutical and biotechnology companies, in veterinary offices and tattoo parlors and for foods, many of which are irradiated.