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 Increasing Emissivity
The surface
characteristics of a material determine its emissivity. To increase a
material’s emissivity, it is necessary to increase the emissivity of its
surface. Following are several methods of altering a material's surface
to increase its emissivity. For a given material, one or more of these
approaches may be effective. Choose the method that is easiest to
apply/remove and that has minimum affect on the temperature of the
material. Apply coatings, treatments, liquids, tapes, or powders as
thin as possible to prevent altering the thermal behavior of the
original material.
Apply a thin layer of tape
Apply a thin layer of paint, lacquer, or other high emissivity coating
Apply a thin coating of baby powder or foot powder
Apply a thin layer of oil, water, or other high emissivity liquid
Apply a surface treatment such as anodizing
Roughen the surface (may require substantial roughening)
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