COLDMARK
ThermoLabels
Model 51001
Model 51002
32°F / 0°C
26°F / -3°C
Before exposure,
bulb is colorless.
After exposure,
bulb turns violet.
Here’s How COLDMARK Works
The COLDMARK Indicator tube and bulb contain a specially formulated colorless fluid, a violetcolored
fluid, and a green colored fluid separating the two.
When the indicator is exposed to a temperature at or below the response temperature within 60
minutes, the colorless bulb solidifies and contracts. This draws the colored liquids into the bulb and
changes from clear and colorless to cloudy with streaks of violet. When the indicator is warmed to
above the response temperature again, the bulb changes irreversibly to a uniform violet.
Application is simple
COLDMARK’s construction makes it fast and simple to add the benefits of temperature monitoring to
your product.
Simply peel the release liner off the back of the indicator and adhere the pressure-sensitive adhesive
backing to a dry surface. You can place the indicator on the exterior or interior of a shipping container.
(COLDMARK indicators should not be placed where they are exposed to crushing pressure.)
Storage
Color change is irreversible and tamper-proof.
COLDMARK Indicators must be stored above their response temperature and should not be exposed
to temperatures exceeding 110°F/ 43°C.​