Ink compositions that include one or more radiation curable oil soluble components and one or more thermal solvents are provided, as well as methods of preparing such ink compositions and methods of using such ink compositions are provided. First and second user monitors are configured to communicate with an interrogator to establish the presence of the user monitors in a defined space. Access to and control of these ports is though a test linking module. The IC chip may be soldered to the printed wiring board and have a rated temperature range corresponding to an industrial grade or military grade integrated circuit.