Owner manual

73
Appendix
Emissivity table
Material
Temperature（°C ）
Emissivity
approximation
Metal
Aluminum
Polished aluminum
100
0.09
Commercial aluminum
foil
100
0.09
Electrolytic
chromeplate alumina
25～600
0.55
Mild alumina
25～600
0.10～0.20
Strong alumina
25～600
0.30～0.40
Brass
Brass mirror (highly
polished)
28
0.03
Brass oxide
200～600
0.61～0.59
Chrome
Polished chrome
40～1090
0.08～0.36
Copper
Copper mirror
100
0.05
Strong copper oxide
25
0.078
Cuprous oxide
800～1100
0.66～0.54
Liquid copper
1080～1280
0.16～0.13
Gold
Gold mirror
230～630
0.02