Barium Sulfate Paint

https://gizmodo.com/worlds-whitest-paint-can-now-be-used-to-cool-cars-and-p-1849613597

https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1010&context=cpl_techniquesinstruments

https://pubs.acs.org/doi/10.1021/acsami.1c02368

https://www.sci.news/othersciences/materials/whitest-paint-09570.html