Abstract: A thermal history detection label for detecting a thermal history over a temperature range to be monitored while suppressing an increase in label size is provided. The thermal history detection label is configured to detect a thermal history by the permeation of a molten permeating material into a permeation body, and the thermal history detection label includes a permeating material that integrally includes a first permeating material having a first melting point and a second permeating material having a second melting point higher than the first melting point, and a permeation body into which the permeating material permeates.

Abstract: A thermal history detection label for detecting a thermal history over a temperature range to be monitored while suppressing an increase in label size is provided. The thermal history detection label is configured to detect a thermal history by the permeation of a molten permeating material into a permeation body, and the thermal history detection label includes a permeating material that integrally includes a first permeating material having a first melting point and a second permeating material having a second melting point higher than the first melting point, and a permeation body into which the permeating material permeates.

Abstract: A temperature sensitive piece 9 has a waxed layer 7 formed on a colored face 4 of a colored paper 6 having an arbitrary plane shape. The waxed layer 7 is formed of a mixture of a proper amount of viscous material and powdered petroleum wax melting at selectively preset temperature. The temperature sensitive piece 9 is affixed to a sheet-shaped base 1 with the waxed layer 7 being located close to the front face of the temperature sensor label. The entire face of the base 1 facing the front face of the temperature sensor label is covered with a transparent film 5.

Abstract: A temperature sensitive piece 9 has a waxed layer 7 formed on a colored face 4 of a colored paper 6 having an arbitrary plane shape. The waxed layer 7 is formed of a mixture of a proper amount of viscous material and powered petroleum wax melting at selectively preset temperature. The temperature sensitive piece 9 is affixed to a sheet-shaped base 1 with the waxed layer 7 being located close to the front face of the temperature sensor label. The entire face of the base 1 facing the front face of the temperature sensor label is covered with a transparent film 5.