| 摘要 |
PROBLEM TO BE SOLVED: To provide an ozone indicator capable of measuring the ozone concen tration or the like even in an especially high-concentration ozone atmosphere. SOLUTION: This ozone indicator is characterized by having at least (1) discoloring layer comprising an ozone detection ink and (2) an overcoat layer formed on a part or the whole of the discoloring layer. The ozone concentration measuring method using the indicator is also provided.
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