B
NONMETALS
Appendix: Emissivity Values
Material | Emissivity (ε) |
Asbestos Board | . . . . . . . . . 0.96 |
Asphalt, tar, pitch | . . . . 0.95 – 1.00 |
Brick – red and rough | . . . . . . . . . 0.93 |
Brick – fireclay | . . . . . . . . . 0.75 |
Carbon – filament | . . . . . . . . . 0.53 |
Carbon – lampblack - rough deposit | . . . . 0.78 – 0.84 |
Glass - Pyrex, lead, soda | . . . . 0.85 – 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 – 0.67 |
Paints, lacquers, and varnishes – flat black lacquer | . . . . 0.96 – 0.98 |
Paints, lacquers, and varnishes – white enamel varnish | . . . . . . . . . 0.91 |
Porcelain – glazed | . . . . . . . . . 0.92 |
Quartz – opaque | . . . . 0.68 – 0.92 |
Roofing Paper | . . . . . . . . 0.91 |
Tape – Masking | . . . . . . . . 0.95 |
Water | . . . . 0.95 – 0.96 |
Wood – planed oak | . . . . . . . . . 0.90 |
