| http://www.w3.org/ns/prov#value | - However, platinum metal has a relatively poor emissivity of the order of 0.08 at a wavelength of 5 nm at 1200??? K and an emissivity of 0.25 at a wavelength of 1 ??m, also at 1200??? K. The emissivity can, however, be improved by application of a suitable coating such as a metal black, an oxide or a silicate, chosen for wide band (e.g. of the order of 1 mm to 10 nm wavelength range) emissivity and
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