For some military applications, paints with low infrared (IR) reflective pigments are used. "The total reflectance (specular and diffuse) of the type II primer coatings, relative to barium sulfate, shall be not greater than ten
percent throughout the range of 700 to 2,600 nanometers (nm)" as measured by a spectrophotometer.
The previous post gives an example of what I was thinking, although this is the first I saw the term "IR-Free".
In corrosion engineering, "IR drop" is a term used to describe a voltage drop as a result of current passing across a resistor (recall the very basic E=IR). I don't have a clue why the term "IR drop" is used vice "voltage drop", but its use is common.
