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Emissivities of Common Materials (Con’t)
Material
Temperature
°C Emissivity
ELECTRIC MATERIALS
Epoxy glass plate
0.86
Epoxy hydroxybenzene plate
0.80
Gilded sheet copper
0.30
Solder-coated copper
0.35
Tin-coated lead wire
0.28
Brass wires
0.87
0.88
Block talcum terminal
0.87