“To achieve this level of radiative cooling below the ambient temperature, we had to apply a layer of paint at least 400 microns thick,” Xiulin Ruan, a Purdue professor of mechanical engineering and developer of the paint said. “That’s fine if you’re painting a robust stationary structure, like the roof of a building. But in applications that have precise size and weight requirements, the paint needs to be thinner and lighter.”
Researchers at Purdue University in Indiana, USA, having already developed ‘the world’s whitest paint’, have gone a step further and created a formulation [.]
The world's whitest paint – seen in this year's edition of Guinness World Records and "The Late Show With Stephen Colbert" – keeps surfaces so cool that it could reduce the need for air conditioning.