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Old 12-19-13, 07:27 PM   #25
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I think .. a infrared thermometer aimed at surface of of the bubble wrap then at the other trial material to compare the surface temperatures could find a winner.
The warmest surface temperature would be desirable I deduce.

Infrared thermometers are touchy, they do not like shiny surfaces so a area sprayed with flat black on each surface would insure continuity in the readings.
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