Omega PX409-USB - Page 36

Emissivity Table
5
5-2
Material Emissivity (ε)
Asbestos Board ....................................................... 0.96
Asphalt, tar, pitch ............................................... 0.95 to 1.00
Brick – red and rough .................................................. 0.93
Brick – fireclay ....................................................... 0.75
Carbon – filament ..................................................... 0.53
Carbon – lampblack - rough deposit ................................ 0.78 to 0.84
Glass - Pyrex, lead, soda ......................................... 0.85 to 0.95
Marble – polished light gray ............................................ 0.93
Paints, lacquers, and varnishes – Black matte shellac .......................... 0.91
Paints, lacquers, and varnishes – aluminum paints ...................... 0.27 to 0.67
Paints, lacquers, and varnishes – flat black lacquer ..................... 0.96 to 0.98
Paints, lacquers, and varnishes – white enamel varnish ........................ 0.91
Porcelain – glazed .................................................... 0.92
Quartz – opaque ............................................... 0.68 to 0.92
Roofing Paper ........................................................ 0.91
Tape – Masking ...................................................... 0.95
Water ........................................................ 0.95 to 0.96
Wood – planed oak ................................................... 0.90
NONMETALS