TEMPERATURE CONTROL MEDIUM

PROBLEM TO BE SOLVED: To provide a temperature control medium capable of showing highly accurate temperature history without generating a wrong reaction, confirming easily the temperature history, and avoiding a possibility of being broken. SOLUTION: Emulsified liquid 3 which is liquid at a room temperature and is solidified by being cooled to a prescribed temperature is stored in an involving material 2 comprising a sheet body 20, and its periphery is sealed. In the involving material 2, the sheet body 20 inner surface is in direct contact with the emulsified liquid 3 without interposing a material comprising an easily-exfoliative member on the sheet body 20 inner surface. The involving material 2 has a transparent part on a part where the emulsified liquid 3 can be viewed from the outside. The emulsified liquid 3 is melted by a temperature rise and generates phase separation. This temperature control medium 1 has the above-mentioned constitution. COPYRIGHT: (C)2006,JPO&NCIPI