THERMAL HISTORY DISPLAY MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a thermal history display material capable of accurately displaying the thermal history (temperature - time history) of an article by hue change even when it is exposed to a high-temperature condition for a long time or many times.SOLUTION: The thermal history display material is formed of a laminated body including: a thermal history display layer in which an associative fluorescent dye having a fluorescent wavelength differing between an excimer state and a monomer state is fixed in a specific molecular dispersion state; and a protective resin layer disposed on at least one surface side of the thermal history display layer. All layers that are in contact with the thermal history display layer do not include an adhesive resin.