ONNLINE DT-8863 Operating Manual page 10

measuring shiny or polished metal surfaces. To compensate,
cove the surface to be measured with masking tape or flat
black paint. Allow time for the tape to reach the same
temperature as the material underneath it. Measure the
temperature ºF the tape or painted surface.
Emissivity Values
Substance Thermal
emissivity
Asphalt 0.90 to 0.98
Concrete 0.94
Cement 0.96
Sand 0.90
Earth 0.92 to 0.96
Water 0.92 to 0.96
Ice 0.96 to 0.98
Snow 0.83
Glass 0.90 to 0.95
Ceramic 0.90 to 0.94
Marble 0.94
Plaster 0.80 to 0.90
Mortar 0.89 to 0.91
Brick 0.93 to 0.96
Substance Thermal
emissivity
Cloth (black) 0.98
Human skin 0.98
Lather 0.75 to 0.80
Charcoal 0.96
(powder)
Lacquer 0.80 to 0.95
Lacquer 0.97
(matt)
Rubber 0.94
(black)
Plastic 0.85 to 0.95
Timber 0.90
Paper 0.70 to 0.94
Chromium 0.81
oxides
Copper 0.78
oxides
Iron oxides 0.78 to 0.82
Textiles 0.90
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