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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