Beta 1760/IR1000 Mode D'emploi page 42

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Thermal
Substance
emissivity
Marble 0.94
Plaster 0.80 to 0.90
Mortar 0.89 to 0.91
Brick 0.93 to 0.96
Thermal
Substance
emissivity
Chromium
0.81
oxides
Copper
0.78
oxides
Iron oxides 0.78 to 0.82
Textiles 0.90