The emission levels of different surfaces
Surface
Emission level
Surface
Emission level
Asphalt
0.90 – 0.98
Varnish (matt)
0.97
Concrete
0.94
Marble
0.94
Chromium oxide
0.81
Human skin
0.98
Ice
0.96 – 0.98
Mortar
0.89 – 0.91
Ferric oxide
0.78 – 0.82
Paper
0.70 – 0.94
Earth
0.92 – 0.96
Plastic
0.85 – 0.95
Hard plaster
0.80 – 0.90
Sand
0.90
Glass
0.90 – 0.95
Foam
0.75 – 0.80
Rubber (black)
0.94
Fabric (black)
0.98
Ceramic
0.90 – 0.94
Textiles
0.90
Carbon (powder)
0.96
Water
0.92 – 0.96
Copper oxide
0.78
Cement
0.96
Varnish
0.80 – 0.95
Brick
0.93 – 0.96
The emission ratios in the above table are approximate values. Parameters such as
the shape and characteristics of the material can affect the emissivity of an object.
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