Scientists have developed ultra-white paint that reflects 95.5% of sunlight, which can cool buildings

Researchers from Purdue University have developed a new white paint that can reflect more than 95% of the sunlight, making the surface temperature even lower than the ambient temperature
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After applying it to buildings, this new coating can help cut cooling costs and energy use
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• White surfaces and objects will reflect more light and therefore will maintain a lower temperature
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In theory, this can be used to help keep buildings cool-after all, air conditioners are one of the biggest energy consumers in summer, and studies have shown that painting buildings white can cool the entire city
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Over the years, scientists have developed many different radiant cooling coatings, using glass, Teflon or most commonly titanium dioxide to reflect sunlight
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But they all have their shortcomings
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In the new study, researchers at Purdue University developed a new formula
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They use cheaper calcium carbonate fillers and absorb less UV, so they stay cool
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The particle concentration in the paint has also reached 60%, and particles of various sizes are used, which all help it scatter more sunlight
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In general, the new radiant cooling paint can reflect 95.
5% of the light
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This is better than many other paints under development, which have reflectance between 80% and 90%, although it is worse than the record holder, Teflon paint, which has a reflectance of 98%
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