Available in closed space. Used to indicate the humidity of the closed space, such as vaccum packaging.
When used in non-closed space, if the space humidity exceeds the highest value of Humidity Indicator Card, the Humidity Indicator Card cannot indicate the humidity of the space.
After articles are packed into bags (whether vacuumed or not), on initial stage, the humidity inside the bag is similar to the humidity outside the bag.
The speed of color changing of the Humidity Indicator Card is related to the humidity it lies. The higher humidity, the faster color changing.
Any packaging film has its MVT Rate( Moisture Vapor Transmission Rate). Please contact your packaging supplier for MVT Rate.
Please use Humidity Indicator Card timely after getting it out from its original packaging. Please use desiccant with Humidity Indicator Card to keep products store longer.
To know the effectiveness of desiccant, you can observing the color changing of Humidity Indicator Card.
To keep a specific dot on Humidity Indicator Card don’t change color, please confirm desiccant exert function of absorption of moisture.
The colors of the point of the dots are depending on their humidity. If humidity exceeds the humidity marked above the dots, the color inside the dots will change to pink gradually. The color depth is also depending on their humidity.
Please don’t let the blue part of dots be tainted with liquid water. If tainted, the color will become lighter and less effective

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