ColdMark is an irreversible temperature indicating label that provides an indication of temperature movement below a certain temperature threshold. Available in five models (-3°C, 0°C, 2°C, 5°C & 10°C), they utilize a chemicall y activated, irreversible dye color change that occurs when the monitored environment reaches a low threshold temperature (+/ -1°C). ColdMarks require special thermal packaging with overnight shipping to prevent a false positive reading prior to use.
Storage: The shelf life of the Cold Mark is two years from date of manufacture. Store the ColdMark indicator in a temperature environment no colder than 5°C above the response temperature. Preconditioning is not required.
Application: Remove the liner from the pressure-sensitive backing, and secure the ColdMark on a clean, dry surface inside the shipping container or on the product.
Interpretation of Results: The appearance of violet color in the ColdMark bulb indicates that the specified low temperature has been reached. If the bulb remains clear and colorless, the environment in the monitored area has remained above the threshold temperature.