A theoretical study into the hiding power of white TiO2-free coatings

 
The maximum theoretical hiding power of non-absorbing, potentially opacifying substances was calculated. For this, the particle size with maximum scattering was assessed. It was then calculated how the performance in hiding power compares to that of titanium dioxide. For comparable hiding power at equal PVC and without additional labelling, an at least 4 times thicker coating layer would be required. This would be a considerable increase in labour, raw material use and ecological footprint.