The Raytek North America website contains a table of spectral emissivity for metals with values at 1.0 micrometers (micron). 1.6 microns and the 8-14 micron waveband. Many values are blank or labelled “nr” for “Not Recommended”. Many others cover relatively wide spans of values, varying as much as a factor of 4. The metals covered include many metal and alloys types.
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