| 摘要 |
The present invention relates to a functional label, having an organic acid coating for detecting external impact, for checking the freshness of a storage material and, more specifically, to a functional label having attached on the upper part thereof a pH indicator layer and an organic acid core coating layer, thereby enabling checking of the freshness of a storage material when a coating layer for detecting changes in temperature cracks in external temperature from -10°C to 40°C. |
