Grading Guide

Temp F˚ (C˚) Emissivity
Adobe
68 (20) 0.9
Asbestos
Board 100 (38) 0.96
Cement 32-392 (0-200) 0.96
Cement, Red 2500 (1371) 0.67
Cement, White 2500 (1371) 0.65
Cloth 199 (93) 0.9
Paper 100-700
(38-371)
0.93
Slate 68 (20) 0.97
Asphalt, pavement 100 (38) 0.93
Asphalt, tar paper 68 (20) 0.93
Basalt
68 (20) 0.72
Brick
Red, rough 70 (21) 0.93
Gault Cream 2500-5000
(1371-2760)
.26-.30
Fire Clay 2500 (1371) 0.75
Light Buff 1000 (538) 0.8
Lime Clay 2500 (1371) 0.43
Fire Brick 1832 (1000) .75-.80
Magnesite, Refractory 1832 (1000) 0.38
Grey Brick 2012 (1100) 0.75
Silica, Glazed 2000 (1093) 0.88
Silica, Unglazed 2000 (1093) 0.8
Sandlime 2500-5000
(1371-2760)
.59-.63
Carborundum
1850 (1010) 0.92
Ceramic
Alumina on Inconel 800-2000
(427-1093)
.69-.45
Earthenware, Glazed 70 (21) 0.9
Earthenware, Matte 70 (21) 0.93
Greens No. 5210-2C 200-750
(93-399)
.89-.82
Coating No. C20A 200-750
(93-399)
.73-.67
Porcelain 72 (22) 0.92
White Al2O3 200 (93) 0.9
Zirconia on Inconel 800-2000
(427-1093)
.62-.45
Clay
68 (20) 0.39
Fired 158 (70) 0.91
Shale 68 (20) 0.69
Tiles, Light Red 2500-5000
(1371-2760)
.32-.34
Tiles, Red 2500-5000
(1371-2760)
.40-.51
Tiles, Dark Purple 2500-5000
(1371-2760)
0.78
Concrete
Rough 32-2000
(0-1093)
0.94
Tiles, Natural 2500-5000
(1371-2760)
.63-.62
Brown 2500-5000
(1371-2760)
.87-.83
Black 2500-5000
(1371-2760)
.94-.91
Temp F˚ (C˚) Emissivity
Cotton Cloth
68 (20) 0.77
Dolomite Lime
68 (20) 0.41
Emery Corundum
176 (80) 0.86
Glass
Convex D 212 (100) 0.8
Convex D 600 (316) 0.8
Convex D 932 (500) 0.76
Nonex 212 (100) 0.82
Nonex 600 (316) 0.82
Nonex 932 (500) 0.78
Smooth 32-200 (0-93) .92-.94
Granite
70 (21) 0.45
Gravel
100 (38) 0.28
Gypsum
68 (20) .80-.90
Ice, Smooth
32 (0) 0.97
Ice, Rough
32 (0) 0.98
Lacquer
Black 200 (93) 0.96
Blue, on Al Foil 100 (38) 0.78
Clear, on Al Foil (2 coats) 200 (93) .08-.09
Clear, on Bright Cu 200 (93) 0.66
Clear, on Tarnished Cu 200 (93) 0.64
Red, on Al Foil (2 coats) 100 (38) .60-.74
White 200 (93) 0.95
White, on Al Foil (2 coats) 100 (38) .69-.88
Yellow, on Al Foil (2 coats) 100 (38) .57-.79
Lime Mortar
100-500
(38-260)
.90-.92
Limestone
100 (38) 0.95
Marble, White
Smooth, White 100 (38) 0.56
Polished Grey 100 (38) 0.75
Mica
100 (38) 0.75
Oil on Nickel
0.001" Film 72 (22) 0.27
0.002" Film 72 (22) 0.46
0.005" Film 72 (22) 0.72
Thick" Film 72 (22) 0.82
Oil, Linseed
On Al Foil, uncoated 250 (121) 0.09
On Al Foil, 1 coat 250 (121) 0.56
On Al Foil, 2 coats 250 (121) 0.51
On Polished Iron,
.001 Film
100 (38) 0.22
On Polished Iron,
.002 Film
100 (38) 0.45
On Polished Iron,
.004 Film
100 (38) 0.65
On Polished Iron,
Thick Film
100 (38) 0.83
Temp F˚ (C˚) Emissivity
Paints
Blue, Cu2O3 75 (24) 0.94
Black, CuO 75 (24) 0.96
Green, Cu2O3 75 (24) 0.92
Red, Fe2O3 75 (24) 0.91
White, Al2O3 75 (24) 0.94
White, Y2O3 75 (24) 0.9
White, ZnO 75 (24) 0.95
White, MgCO3 75 (24) 0.91
White, ZrO2 75 (24) 0.95
White, ThO2 75 (24) 0.9
White, MgO 75 (24) 0.91
White, PbCO3 75 (24) 0.93
Yellow, PbO 75 (24) 0.9
Yellow, PbCrO4 75 (24) 0.93
Paints, Aluminium
100 (38) .27-.67
10% Al 100 (38) 0.52
26% Al 100 (38) 0.3
Dow XP-310 200 (93) 0.22
Paints, Bronze
Low .34-.80
Gum Varnish (2 coats) 70 (21) 0.53
Gum Varnish (3 coats) 70 (21) 0.5
Cellulose Binder (2 coats) 70 (21) 0.34
Paints, Oil
All colours 200 (93) .92-.96
Black 200 (93) 0.92
Black Gloss 70 (21) 0.9
Camouflage Green 125 (52) 0.85
Flat Black 80 (27) 0.88
Flat White 80 (27) 0.91
Grey-Green 70 (21) 0.95
Green 200 (93) 0.95
Lamp Black 209 (98) 0.96
Red 200 (93) 0.95
White 200 (93) 0.94
Quartz, Rough, Fused
70 (21) 0.93
Glass, 1.98 mm 540 (282) 0.9
Glass, 1.98 mm 1540 (838) 0.41
Glass, 6.88 mm 540 (282) 0.93
Glass, 6.88 mm 1540 (838) 0.47
Opaque 570 (299) 0.92
Opaque 1540 (838) 0.68
Red Lead
212 (100) 0.93
Rubber, Hard
74 (23) 0.94
Rubber, Soft, Grey
76 (24) 0.86
Sand
68 (20) 0.76
Sandstone
100 (38) 0.67
Sandstone, Red
100 (38) .60-.83
Sawdust
68 (20) 0.75
Shale
68 (20) 0.69
Temp F˚ (C˚) Emissivity
Silica,Glazed
1832 (1000) 0.85
Silica, Unglazed
2012 (1100) 0.75
Silicon Carbide
300-1200
(149-649)
.83-.96
Silk Cloth
68 (20) 0.78
Slate
100 (38) .67-.80
Snow, Fine Particles
20 (-7) 0.82
Snow, Granular
18 (-8) 0.89
Soil
Surface 100 (38) 0.38
Black Loam 68 (20) 0.66
Plowed Field 68 (20) 0.38
Soot
Acetylene 75 (24) 0.97
Camphor 75 (24) 0.94
Candle 250 (121) 0.95
Coal 68 (20) 0.95
Stonework
100 (38) 0.93
Water
100 (38) 0.67
Waterglass
68 (20) 0.96
Wood
Low .80-.90
Beech Planed
158 (70) 0.94
Oak, Planed
100 (38) 0.91
EMISSIVITY CHART
Non-Metal and
Metal Materials
NON-METAL MATERIALS