| 摘要 |
PROBLEM TO BE SOLVED: To provide a cold pack with which a user can easily observe whether the cooling state is as intended.SOLUTION: A cold pack is provided, comprising a cooling composition whose color changes before and after the freezing, the cooling composition containing dyes, ammonium chloride, and a solvent. The content of the dyes in the cooling composition is 2000 ppm or less, and a part of the dyes is not dissolved in the cooling composition when its temperature is at any point between 20 and 25°C. |
