Dongguan Onestep Packing Material Co., Ltd.

A humidity card is a card used to show the humidity status of a sealed space, and the percentage data above or on the side of the circle indicates relative humidity data corresponding to the circle. The humidity card can visually determine the humidity condition from the color change. When dry the humidity card is blue, if the color in the circle from blue to pink, indicating that the humidity in the package reached or exceeded the relative humidity value of the circle.