RayTek 54301 - Manual (Page 92)

Appendix
N
ON
-M
ETALS
Material Emissivity
3.9 µm 5 µm 8 – 14 µm
Asbestos 0.9 0.95
Asphalt 0.95 0.95
Basalt 0.7 0.7
Carbon
Unoxidized 0.8-0.9 0.8-0.9
Graphite
0.7-0.9 0.7-0.8
Carborundum 0.9 0.9
Ceramic 0.8-0.95 0.95
Clay 0.85-0.95 0.95
Concrete 0.9 0.95
Cloth 0.95 0.95
Glass
Plate 0.98 0.85
“Gob” 0.9 —
Gravel 0.95 0.95
Gypsum 0.4-0.97 0.8-0.95
Ice — 0.98
Limestone 0.4-0.98 0.98
Paint (non-al.) — 0.9-0.95
Paper (any color) 0.95 0.95
Plastic, opaque at 500 µm
(20 mils) thickness
0.95 0.95
Rubber 0.9 0.95
Sand 0.9 0.9
Snow — 0.9
Soil — 0.9-0.98
Water — 0.93
Wood, Natural 0.9-0.95 0.9-0.95
Tab. 11: Typical Emissivity Values for Non‐Metals
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