These labels are known as TTI's ( Time Temperature Indicators) and show the length of time exposed to temperatures above the formulated activation. After activation, the ink begins to stain a filtered paper and permanently records how long the threshold cumulative temperature has been exceeded. Most labels have "one" threshold temperature but there are special items that use two or more temperature points. These usually require larger quantities purchase and/or special order requirements. Please call our Thermal Advisors.
TTI Labels are available with the following range. -4°F to 100°F (-20°C to 38°C) applications above 100°F/38°C must consider using Irreversible Temperature Labels.