1.Humidity indicator card is a kind of accurate and convenient humidity testing means, through the color change of the indicting dots on the card. 

2.Easy to clearly observe the relative humidity inside the current packaging.

3.Cobalt Dichloride free series, Cobalt free series, Cobalt and Halogen free series humidity indicator, which can meet the needs of humidity indication on different occasions and under different environment.

4.Widely indicating range can be customized from 10-90%.

5. Color change: Blue-Pink(common HIC), or brown to light blue(Cobalt-free HIC) .