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Keywords:

  • accumulated heat exposure;
  • dye adsorption;
  • dye sublimation;
  • irreversible time-temperature integrators;
  • mass transfer
Thumbnail image of graphical abstract

Heat history monitor: Combination of the sublimation and adsorption processes of specific dyes can be used as a measure of accumulated heat exposure. Mass transfer from the sublimation layer to the adsorption layer strongly depends on temperature and results in a gradual color change in the adsorption layer. The total color change reflects the accumulated heat exposure.