Maximum Humidity indicator Card

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
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