Originally used by Pillsbury for its Hungry Jack® syrup, they are now available for a range of products. They react within the temperature range of 24°F to 137°F. Temper-ature-indicating inks are available in a range of colors.
Temperature indicators
Opti-Therm(TM) temperature-sensitive labels from Mid America Div. of Menasha (Neenah, WI) tell consumers when a food product is at the proper serving temperature.
Feb 29, 1996
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