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The emissivity values listed in the following table are approximate values. Various factors such
as geometric shape and surface quality may affect an object‘s emissivity.
Surface
Emissivity
Aluminum (bare)
0.04
Asphalt
0.90 – 0.98
Cement
0.94
Ice
0.96 – 0.98
Iron oxide
0.78 – 0.82
Plaster
0.80 – 0.90
Glass, porcelain
0.92 – 0.94
Rubber (black)
0.94
Wood
0.94
Plastic
0.94
Paint (matt)
0.97
Foods
0.93 – 0.98
Human skin
0.98
Paper
0.97
Sand
0.90
Textiles
0.90
Water
0.92 – 0.96
Brick, grout
0.93 – 0.96