Tamper-proof seal and method for using same

The unjust opening prevention seal 10, 300 used in relation to a sterile container is indicated. This seal is equipped with the piece 14, 314 of 延在する舌 from the main part part 12, 312 equipped with the sterilization directions material 16, and its main part part. The piece of a tongue is good in it being a form of one pair which sandwiches the high contraction internal layer 24, 324 of laminations which consist of inactivity outer layers 20 and 22, 320, 322 substantially. When a container is in a closed position and a latch mechanism is in a latch position, the piece of a tongue is constituted so that engaging of clutch may be carried out to the latch mechanism 106 of the sterile container 100. When this container is exposed to a sterile condition, it will contract, an outer layer will lie one upon another, and the piece of a tongue will form at least one pleat 200, 390, 392. Since the latch mechanism of a container is not opened unless the piece of a tongue of a seal fractures, it becomes possible to bring about a visible proof which shows that the latch mechanism was opened.