Generally, the lower the temperature in the environment, the slower the tape will react. Temperatures below 0°F (-17°C) result in an exponentially longer response time, possibly even months/years. In higher temperatures, the color changing process is accelerated. Temperatures above 350°F (176°C) are  known to break down the chemo-chromic pigments over time, deactivating the ability for the tape to change color. Further testing in developing a higher temperature ceiling is ongoing.