To define the abnormal quality extent of a photographic film cartridge and to minimize the disposal extent.

An individual identification number 18 constituted of ten-digit alphanumeric characters is printed by an ink jet printer on the outer peripheral surface of the case body 16 of a plastic case 15 for storing the photographic film cartridge 2. The individual identification number 18 includes a production line number, a manufacture starting date and a tracking number as information, and the number of the master roll and also the number of the slit roll used for the photographic film cartridge 2 can be specified by checking the number against the production control information of the photographic film cartridge 2, thereby the cause of the defect and the extent of the defect can be accurately specified.