Earlier investigations (Baughn, 1999; Sabatino, 2000; Smith, 2001) have reported hysteresis in the liquid crystal response, the hue-temperature behavior during cooling being significantly different from that during heating. Hysteresis is likely to occur if the heating cycle takes the liquid crystal material beyond its clearing point temperature. Conversely, the transient experiment may have been initiated below the event temperature. To eliminate hysteresis effects, proper care is taken to ensure that the test surface operates strictly between the pre-defined temperature limits. In the studies conducted by the authors, calibration of the liquid crystal sheet has been performed during the cooling of plate within the end point temperatures. By performing the calibration test several times, the authors have seen that the calibration curve is repeatable.