TEMPERATURE CONTROL MEDIUM

PROBLEM TO BE SOLVED: To provide a temperature control medium that can show accurate temperature history, allows recognition of the temperature history of an article inside a box body easily without opening the box body, extremely hardly breaks, and can minimize the damage even if it breaks. SOLUTION: Emulsified liquid 3 that is liquid at room temperature and is coagulated by cooling to a predetermined temperature is stored in a capsule material 2 made of a sheet body, and the periphery is closed. The capsule material 2 storing the emulsified liquid 3 is stored in a casing 4 having shape retention nature so as to form an air layer 6 between the capsule material 2 and the casing 4. The capsule material 2 and the casing 4 partly have a transparent section allowing the emulsified liquid 3 to be visually inspected from the outside. The emulsified liquid 3 is fused and phase-separated by temperature rise. The temperature control medium 1 has the constitution. COPYRIGHT: (C)2006,JPO&NCIPI