| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate with an oxygen indicator function, capable of enabling a consumer or a producer to easily discriminate oxidation degradation of a content by a color tone shown by an oxygen indicator, and to provide a packaging bag using the laminate.SOLUTION: A laminate comprises an oxygen indicator containing a color material for performing coloration under the presence of oxygen on at least one surface, and a base material subjected to printing pattern for determining an oxygen state. In the laminate, the color tone of the printing pattern for determining the oxygen state is the same as the color tone of allowable upper limit of oxygen concentration shown by the oxygen indicator. |
