Dishwasher sanitation temperature label White to black color change when temperature is reached Pack of 24 labels Made in the USA Waterproof A popular irreversible registering temperature indicator for dishwasher sanitation (and HACCP compliance). These test strips can be used in meeting the requirements of United States FDA Food Code, Section 4.7. Our completely waterproof 3-Temp Thermolabel features temperature sensitive elements that produces a non-reversible white to black color change at their rated temperature. This provides a clear indication that the temperature has been reached. The temperature elements are 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 16 labels each. Store in a cool, dry place.