PRINT ACTIVATABLE ENVIRONMENTAL SENSOR PROVIDING A DELAYED THRESHOLD TEMPERATURE RESPONSE

Abstract: printer activatable environmental exposure indicators utilizing chemical encapsulation are disclosed herein. an example activatable environmental exposure indicator includes a substrate, an environmental indicator material configured to respond to a predetermined environmental stimulus, a plurality of microcapsules on or embedded in the substrate, and a bar code layer containing a bar code symbol and a viewing area. the microcapsules contain the environmental indicator material and are configured to respond to at least one of an activation temperature and an activation pressure by allowing the environmental indicator material to be released from the microcapsules. the environmental indicator material, after being released from the microcapsules, is configured to respond to exposure to the predetermined environmental stimulus by causing a detectable response.

Inventor(s): Brian S. HUFFMAN, Deniz BOYU, Mohannad ABDO

CPC Classification: G06K19/06037 ({multi-dimensional coding})

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