Humidity indicator cards are used in dry, packing for detecting the humidity leveling the dry pack environment. The indicating spots on the card are impregnated with a moisture sensitive chemical which will change color upon absorbing moisture. By varying the concentration of this chemical, the color change of the chemical can be controlled at different humidity levels. Thus, by reading the color change on the indicating spots, the user will be able to identify the actual level of humidity in the dry pack environment.

Our range of humidity indicator cards are carcinogen-free . the indicating spots contain a proprietary chemical which, in the dry state is Blue color. After absorbing moisture, the Blue color changes to Pink.