Product Manual

Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Chromium
polished 50 T 0.10 1
Chromium polished 500–1000 T 0.28–0.38 1
Clay fired
70 T 0.91 1
Cloth
black 20 T 0.98 1
Concrete
20 T 0.92 2
Concrete dry 36 SW
0.95 7
Concrete rough 17 SW
0.97 5
Concrete
walkway
5
LLW 0.974 8
Copper commercial,
burnished
20 T 0.07 1
Copper electrolytic, care-
fully polished
80 T 0.018 1
Copper
electrolytic,
polished
–34 T 0.006 4
Copper
molten 1100–1300 T 0.13–0.15 1
Copper
oxidized 50 T 0.6–0.7 1
Copper
oxidized to
blackness
T 0.88 1
Copper
oxidized, black 27 T 0.78 4
Copper
oxidized, heavily 20 T 0.78 2
Copper
polished 50–100 T 0.02 1
Copper
polished 100 T 0.03 2
Copper
polished,
commercial
27 T 0.03 4
Copper polished,
mechanical
22 T 0.015 4
Copper pure, carefully
prepared surface
22 T 0.008 4
Copper
scraped 27 T 0.07 4
Copper dioxide
powder T 0.84 1
Copper oxide
red, powder T 0.70 1
Ebonite T 0.89 1
Emery
coarse 80 T 0.85 1
Enamel 20 T 0.9 1
Enamel lacquer 20 T 0.85–0.95 1
Fiber board hard, untreated 20
SW
0.85 6
Fiber board masonite 70
SW
0.75 9
Fiber board masonite 70 LW 0.88 9
Fiber board particle board 70
SW
0.77 9
Fiber board particle board 70 LW 0.89 9
Fiber board porous, untreated 20
SW
0.85 6
Gold
polished 130 T 0.018 1
Gold polished, carefully
200–600 T 0.02–0.03 1
Gold
polished, highly 100 T 0.02 2
Granite
polished 20 LLW 0.849 8
#T559828; r. AC/ 9610/10386; en-US
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