ASTM E423 Normal Spectral Emittance
ASTM E423 test method specifies an accurate method for determining the normal spectral emittance of electrically nonconducting materials at temperatures ranging from 1000 to 1800 K and wavelengths ranging from 1 to 35 m. This test method necessitates the use of particular specimen size and design, as well as particular heating and viewing procedure.
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