> layer, not the dye per say. It may add to it, I don't
> know. The way I was always
> taught was black absorbs heat, and anything bright like
> white or silver reflects it.
> I would think the mass or thickness directly under the
> device is what will help
> keep it cool, and the find transfer the heat to cool it
> off by the air circulating past
> them. I can't see where black would help this at all,
> unless they say the black
> helps with the heat transfer to the air.
Black or dark colors aid in infrared exchanges in both
directions. This is why thermos jugs or bottles are the same
shiny clear surface no matter when used for hot or cold
liquids and heat exchangers that are not exposed to external
heat radiation are often black.
Aavid, a leading manufacturer of heatsinks, even advises it
is a good idea to use a black or dark anodized heatsink to
aid in radiation mode heat transfer unless the heatsink is
facing a hotter object nearby.
Black isn't a diode. Like a good antenna, it both radiates
and receives both directions better.
73 Tom
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