FUEL CARTRIDGE FOR FUEL CELL WHICH CAN DISPLAY THERMAL HYSTERESIS

PROBLEM TO BE SOLVED: To provide a fuel cartridge for a fuel cell capable of displaying thermal energy with time as well as temperature in consideration as thermal hysteresis, suited for high-speed production, and capable of displaying the thermal hysteresis at low cost. SOLUTION: The fuel cartridge 10 for a fuel cell for replenishing fuel to a fuel tank of a fuel cell main body generating power with the use of liquid fuel is provided with a thermal hysteresis display part 20 printing with an ink-jet printer a thermal hysteresis display ink composition displaying thermal hysteresis by temperature and time. From changes of colors of the thermal hysteresis display part 20, thermal hysteresis taking time as well as temperature in consideration can be known, and damage or the like due to heat of the fuel cartridge can be estimated. Further, by directly printing with the ink-jet printer, display can be made at high speed and at low cost, and the display is prevented from being peeled off to be separate as a label. With this, a user can stop using from the display of the thermal hysteresis, while the maker can grasp in what conditions it has been used. COPYRIGHT: (C)2008,JPO&INPIT