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Purdue Professor Xiulin Ruan and his team have developed the world s whitest white paint (Credit: Joseph Peoples/Purdue University)
Given that white was one of the first colors used in art in the 15th century, one would think that there is little room left to improve its whiteness. It turns out that is far from the case. A team of researchers led by Xiulin Ruan, a professor of mechanical engineering at Indiana s Purdue University, recently revealed an ultra-white paint that they believe could even help combat climate change.
The scientists, who spent six years creating the world s whitest white paint, assert that the options currently available make surfaces warmer rather than cooler. That s because they only reflect 80 to 90 percent of the sunlight and cannot make the exterior cooler than the surrounding temperature. The newly-revealed ultra-white paint not only reflects 98.1 percent of sunlight, but also prevents surface infrared heat from being absorbed.
collaboration
The whitest-ever paint has been produced by academic researchers, with the aim of boosting the cooling of buildings and tackling the climate crisis.
The new paint reflects 98 per cent of sunlight as well as radiating infrared heat through the atmosphere into space. In tests, it cooled surfaces by 4.5 C below the ambient temperature, even in strong sunlight. The researchers said the paint could be on the market in one or two years.
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White-painted roofs have been used to cool buildings for centuries. As global heating pushes temperatures up, the technique is also being used on modern city buildings, such as in Ahmedabad in India and New York City in the U.S.
Whitest-ever paint could help cool heating Earth, study shows
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