This card contains 5 blue crystals. Each crystal represents a different level of relative humidity. When exposed to humidity for 24 hours or more the crystal dissolves unto a large blue spot above the indicated humidity percentage. The highest percentage indicated by a dissolved crystal is the maximum amount of humidity that the item has been exposed to; once dissolved the spot will remain even if the relative humidity has fallen below the indicated percentage for a prolonged time.
|Product Code||Description||Indicates (%RH)||Size (inch)||Pack Size|
|ANT56789||Maximum spot HIC||50, 60, 70, 80, 90||4.5 x 3||50 cards per gallon|