ColdMark

A Freeze Indicator To Monitor Damaging Cold Temperatures
ColdMark Freeze Indicators put you in control even after your product has been shipped. With ColdMark, your customer will know at a glance if the product has been exposed to damaging or extreme temperatures during shipping or storage. The ColdMark indicator accurately shows if your product has been exposed to cold below 32°F/0°C. This is done by its colorless indicator bulb turns to an irreversible violet color as temperatures rise above the indicator's response temperature. (Other response temperatures are also available.)

Importantly, ColdMark is guaranteed to work within plus or minus 1 degree of this response temperature, the highest level of accuracy available in the industry. ColdMark Freeze Indicators are a strategic, value-added plus for your product, providing a permanent record that assures your customers of consistent quality.

How the ColdMark Works
The ColdMark Indicator tube and build contain a specially formulated colorless fluid, a violet-colored fluid, and a green-colored fluid separating the two.

When the indicator is exposed to a temperature at or below the response temperature for approximately 30 minutes, the colorless bulb fluid solidifies and contracts. This draws the colored liquids into the bulb and the bulb 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 the interior of a shipping container. (ColdMark Indicators should not be placed where the are exposed to crushing pressure.)

Real-world Applications

• Pharmaceuticals and blood products
• Food products
• Adhesives
• Photographic and film products

Specifications