Welcome to Pirta
The world needs a better method of cooling
Father and son team develop world’s coolest paint in home garage during Covid-19. Pirta paint in full sun is cooler than being in the shade!
Engineering dynamos Howard and Robert Atkin began working on the revolutionary paint formula during the Covid-19 lockdown before launching a rigorous validation process with the University of Leeds, the University of Utah and Mahatma Gandhi University, testing more than 800 samples over a two-year period.
Final results - set to be published by the University’s Materials Science and Engineering Department - will reveal exceptionally high emissivity, or ability to release heat, reaching 0.998 on a scale of 0-1. Due to its unique properties, the paint formula can reduce surface temperature by up to 64°C (114.4°F) compared to a black surface.
Lab figures also show a peak reflectance of 99.82% across visible and ultraviolet light spectrums. The overall performance was calculated using both reflectivity and emissivity scores, returning a Figure of Merit of 0.934.
In addition, the paint formula’s Solar Reflective Index (SRI), recognised in the USA as an industry standard for measuring material thermal properties, was valued at 116.8. While most materials have an SRI between 1 and 100, higher values indicate greater reflectance and emissivity and an improved ability to passively cool a structure.
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