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Found this tonight, seems like reasonable testing.
http://static.monolithic.com/plan-design/ceramic/index.html

Editors update 09-17-02: The federal trade commision has ruled against companies that make claims that their paints have insulative value. The formal complaint, agreement and other documents can be viewed at http://www.ftc.gov/opa/2002/04/kryton.htm.


As can be seen from the graphs, there is little difference in temperature between the white paint and the ceramic coatings. Under no conditions can the ceramic coating be called an insulation. It is simply a reflective surface.
 

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This is why Algore et al can continue to propagate his global warming scam - the general population is 1) woefully ignorant of technical issues and, b)willing to believe any claim that seems to get something for nothing.

To review, resistance to heat through a media can be accomplished several ways. Most obvious is some sort of insulation such as a glass wool blanket as in our house walls, evacuated chamber as in a Thermos bottle. Second is to eliminate convection (fluid flow between the two different temperature regions) and most situations do that such as a sealed house wall, exhaust pipe w/ good gaskets, etc. Finally there is a large radiant heat transfer component that is abated with white colored and/or polished surfaces. A perfectly polished, perfectly white surface emits or absorbs (depending on whihc are is hotter) no radiation whereas a perfect black surface emits or absorbs large quantities of radiation. Obviously it is impossible to achieve perfect surfaces in either extreme but we can get in the high 90s% efficiency. It is this radiant heat reduction where these special surfaces have their claim and it is pretty effective but in no way can they achieve an R22 with white paint! The surfaces are still as hot and although they don't emit much radiant heat so achieve significant 'insulation' in that respect, they still transfer a lot of heat due to convection of air past them.
 
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