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Researchers at Purdue Create the Whitest White Paint in the World

Barium Sulfate, which is also used to make photo paper and cosmetics white, is present in extremely high concentrations in this paint.

It is regarded as a sustainability breakthrough that could lessen or possibly eliminate the need for air conditioning and the energy required to power it.

The researchers explored more than 100 materials before settling on only 10. A total of 50 distinct formulations for each material were then evaluated in the lab.

That's when they discovered barium sulfate. The concentration and size of the compound serve as the two major defining characteristics of the paint.

This whitest white paint resembles Vantablack, which can block up to 99.9% of visible light. Ruan's lab arrived on a paint that reflects up to 98.1% of sunlight.

Nearly all of the sunlight that hits this paint is reflected; no energy is being absorbed. Then it also emits thermal energy into outer-space meaning it sends out more heat than it takes in.

Without using any electricity at all, the paint naturally cools itself below ambient, creating free refrigeration.

The world's whitest paint, developed by Xiulin Ruan and his team was recently given this designation in the Guinness Book of  World Records.

also read our article on the 'whitest ever paint' only on Newsum

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images: USA today
videos: pbs news hour