Paper Thermometers completely waterproof 1-Temp Thermolabel features a temperature sensitive element that produces a non-reversible white to black color change at the rated temperature. This provides a clear indication that the temperature has been reached. The temperature element is fully enclosed and protected with a clear plastic overlay, providing both moisture protection and durability, making these labels ideal for a wide range of applications. The self-adhering indicators are available in packages of 24 labels each. Store in a cool dry, place.