Emissivity table for infrared measurement

Aluminium, mill finish

170°C

0,04

Aluminium, non-oxidized

25°C

0,02

Aluminium, non-oxidized

100°C

0,03

Aluminium, heavily oxidized

93°C

0,20

Aluminium, highly polished

100°C

0,09

Cotton

20°C

0,77

Concrete

25°C

0,93

Lead

40°C

0,43

Lead, oxidized

40°C

0,43

Lead, grey oxidized

40°C

0,28

Chromium

40°C

0,08

Chromium, polished

150°C

0,08

Ice, smooth

0°C

0,97

Iron, sanded

20°C

0,24

Iron with cast skin

100°C

0,80

Iron with mill scale

20°C

0,77

Gypsum

20°C

0,90

Glass

90°C

0,94

Granite

20°C

0,45

Rubber, hard

23°C

0,94

Rubber, soft, grey

23°C

0,89

Cast iron, oxidized

200°C

0,64

Wood

70°C

0,94

Cork

20°C

0,70

Heat sink, black, anodized

50°C

0,98

Copper, slightly tarnished

20°C

0,04

Copper, oxidized

130°C

0,76

Copper, polished

40°C

0,03

Copper, rolled

40°C

0,64

Plastics: PE, PP, PVC

20°C

0,94

Paint, blue on aluminium foil

40°C

0,78

Paint, black, matt

80°C

0,97

Paint, yellow, 2 coats on aluminium foil

40°C

0,79

Paint, white

90°C

0,95

Marble, white

40°C

0,95

Masonry

40°C

0,93

Brass, oxidized

200°C

0,61

Oil paints (all colours)

90°C

0,92 - 0,96

Paper

20°C

0,97

Porcelain

20°C

0,92

Sandstone

40°C

0,67

Steel, heat-treated surface

200°C

0,52

Steel, oxidized

200°C

0,79

Steel, cold-rolled

93°C

0,75 - 0,85

Clay, fired

70°C

0,91

Transformer varnish

70°C

0,94

Brick, mortar, plaster

20°C

0,93

Zinc, oxidized

-

0,10