Humidity indicator cards are used in sealed packaging of high-grade electronic components and instrumentation (e.g. integrated circuits, ICs, chips, etc.) that are sensitive to humidity. when the improvement of environmental requirements in the industry, environmentally humidity indicator cards without cobalt dichloride are produced.
Cobalt dichloride-free humidity indicator cards are used to show relative humidity in enclosed spaces. it cannot approach liquid water. Indicates that the colors within the dot vary with humidity, that the color changes in the dry and wet states of different products are easy to identify, and that the indicator values are stable and reusable.