How to reduce the emissivity of metal surface?
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Answer : Surface emissivity is the amount of infrared energy emitted by a specific material. It is often expressed as a ratio or percentage of “1” with the “1.0” value being perfect “black body”. A material that emitted heat energy at half that rate, like polyester film, would have a rating of .50 or 50%. Objects like aluminum or copper, with low surface emissivity (low-e) do not transmit heat well because most of the infrared energy is reflected instead of absorbed.
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