White Paint, Squared

Scientists at Purdue University have created the whitest white paint ever made–a paint so white it has been recognized by the Guinness Book of World Records as the whitest paint in history. (Who would have thought there was even such a category?)

This isn’t of interest to only those people who like to go to paint stores to get those little paint squares and then debate whether their ceilings should be painted in eggshell, or pearl, or alabaster. The whole point of the whitest paint invention process was to try to develop a paint that could actually conserve energy, and thereby address climate change, by making a paint that is as reflective of sunlight as possible. As scientists worked on the problem, they discovered that sunlight reflection and dazzling whiteness went hand in hand.

The new paint is much more reflective than commercially available white paint–bouncing back 98.1 percent of solar radiation–and it also emits infrared heat. As a result, a surface coated with the paint, such as a roof, or the walls of a house, becomes cooler than the surrounding temperature. Using the paint therefore could help to cool buildings and reduce the need for air conditioners and their power consumption, which could relieve the pressure on the nation’s already taxed power grid and the environmental effects associated with generation of electric power.

It’s a pretty ingenious, and painless, way of conserving energy. And who knew? It turns out that inventing a brilliant new white paint is a lot more exciting than watching paint dry.

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