Dongguan Onestep Packing Material Co., Ltd.

The non-cobalt humidity indicator card is used to quickly determine the humidity in a particular sealed package, in order to ensure that the humidity in the package is in line with the requirements of product packaging, through the humidity card to assess whether the desiccant in the sealed packaging has been regulating humidity to the safety and humidity range, humidity card can be visually from the color changes to determine the humidity situation. Non-cobalt humidity card is also reversible reaction, the specific packaging in the air humidity drying, humidity card corresponding humidity point of the color will be changed back to dry state. When dry the humidity card is brown, if the color in the circle from Brown to sea blue, indicating that the humidity in the package to reach or exceed the color circle corresponding to the relative humidity value.