Surface - Radiation Absorptivity

Radiation surface absorptivity

The absorptivity is the amount of radiation absorbed by a surface compared to what is absorbed by a black body.

Aluminum, dull/rough polished 0.4 - 0.65
Aluminum. polished 0.1 - 0.40
Asbestos Cement, old 0.83
Black matte 0.95
Chromium plate 0.20
Iron, galvanized old 0.89 - 0.92
Grey paint 0.95
Light green paint 0.95
Limestone 0.33 - 0.53
Red clay brick 0.94
White paint 0.89

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