| 摘要 |
PROBLEM TO BE SOLVED: To provide an oxygen indicator that allows visual step-by-step confirmation of a change in amount of oxygen with time after switch from a deoxygenated state to an aerobic state.SOLUTION: An oxygen indicator includes a sequentially laminated structure of a base material 1, an oxygen indicator layer 2 with an oxygen detecting function, and an oxygen gas barrier layer 3. The oxygen indicator layer 2 has a uniform thickness, and the oxygen gas barrier layer 3 is made of different regions with different film thicknesses.SELECTED DRAWING: Figure 1 |
