| 摘要 |
PROBLEM TO BE SOLVED: To provide a temperature sensitive label which is capable of recording the total quantity of heat with time given to the objective body at a low cost. SOLUTION: Wax 2 in a sheet state which contains dispersion of pigments and which starts to melt at preliminarily determined temperature is overlapped on the top face of a wax absorbing material 1 in a sheet state in such a manner that the wax 2 is in a smaller area than the wax absorbing material 1 to leave a margin 3 in the periphery. Then a color developing material 5 in a sheet state which has a colored face 4 on one face and which changes from opaque to transparent to make the colored face visible through the sheet when the wax 2 melts and permeates is applied thereon with the colored face 4 in the side of the wax 2. A double face adhesive tape 6 is stuck to the back face of the wax absorbing material 1, and the whole top surface side is covered with a transparent film 7.
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