Oneirix Labs invented a perfectly white pigment, with no hue at all. This is unheard of, in the paint and pigment manufacturing business.
We achieved this by using Mie scattering along with our own modifications to radiative transfer equations. The mathematical result itself is surprising, considering that Mie scattering itself proves that no single refractive particle can be colour insensitive.
Paint and pigment manufacturers go to extreme lengths to carefully classify and declare the “slight hues” that their white pigments have. This has been the case because a pigment is made up of microscopic particles of one refractive index, embedded in a material of a different refractive index. Light scatters as it traverses the boundary between these different refractive indices. Multiple such scatterings cause light to reflect back from the pigment in a diffused fashion. Since every wavelength of light scatters a little differently, this creates a hue.
A pure white pigment would take away a lot of complexity in colour mixing, and help achieve far superior, consistent paint finishes than possible today.
Read more in the patent application Color insensitive scattering pigment.