Indicator element for showing when a predetermined temperature has been exceeded comprises an encapsulated indicator dissolved or emulsified in a liquid phase

摘要

Indicator element for showing when a predetermined temperature (T) has been exceeded comprising an encapsulated indicator dissolved or emulsified in a phase that is liquid at temperatures above T, is new. The indicator is released into the liquid phase only when the temperature exceeds T after having been below T, thereby producing an optically detectable change in the indicator element. An independent claim is also included for production of the indicator element by encapsulating the indicator, dissolving or emulsifying it in the liquid phase and introducing the product into a container.