| 摘要 |
PURPOSE: An environmental-friendly humidity indicator is provided to not contain chloride cobalt, and to easily detect stability of a packing state. CONSTITUTION: A humidity indicator comprises 0.01-5wt% of main indicator, 1-5wt% of adsorption material, 54-75wt% of water, 10-25wt% of pH controller, 0.01-0.5wt% of aqueous dye, and 1-15wt% of precipitation preventer. The humidity indicator comprises one or more selected from alizarin, bromocresol purple, benzaurine, cresol benzyne, phenol red, bromophenol red, chlorophenol red, ethyl red, and ethyl orange. The adsorption material comprises one or more selected from glycerine, calcium chloride, sodium chloride, magnesium chloride, sodium sulfate, and magnesium sulfate. |
