Moisture indicator cards is used in collaboration with dehumidifier and conditioner products. They show the quantity of moisture sensitively in the package.
Moisture indicator cards can be used as guaranteed control mechanism that shows if the packaged product is protecting against external factors during shipping and stocking. Also it performs a duty as a guarantee and informing mechanism that shows if the product sensitive for moisture is exposed to moisture on first open of package.
Also there are products that shows different moisture ranges related to application sensivity.