14
APPENDIX
EMISSIVITIES OF COMMON MATERIALS
Material
Emissivity
Gold (pure, highly polished)
0.02
Aluminum foil
0.04
Aluminum disc
0.18
Aluminum (household, flat)
0.01
Aluminum (polished plate)
0.05
Aluminum (rough plate)
0.06
Aluminum (oxidized)
0.15
Aluminum surfaced roofing
0.22
Tin (bright tinned iron sheet)
0.04
Nickel wire
0.10
Lead (99.95% pure, unoxidized)
0.06
Copper
0.18
Steel
0.55
Zinc (galvanized sheet iron, bright)
0.23
Brass (highly polished)
0.03
Brass (hard rolled, polished w/lines)
0.04
Iron galvanized (bright)
0.13
Iron plate
0.69
