Comments by "geemy" (@geemy9675) on "This Material Might Change How We Cool Our Houses Forever" video.

  1. e ink does it with tiny spheres that are black on one side and white on the other and can be switched with electric field. they don't have a lot of contrast though but I guess if you make the black side blacker and the white side whiter it can help. they have done it on prototype cars (BMW)
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