Two different types of white pigments - similar optical reaction

 
Titanium dioxide is one of the most widely used pigments and is mainly used in paints and coatings. In addition to being used as pigments in the 200 - 300 µm range, titanium dioxide is also used to coat interference pigments. If the optical properties of a titanium dioxide pigment are compared with those of a white interference pigment, comparable reactions with colored pigments can be observed. Green and blue colored pigments show an increase in chroma and brightness up to a turning point when they are mixed with white pigments or interference pigments. From this turning point, the chroma decreases and the brightness continue to increase. Red and yellow colored pigments show no increase in chroma. Especially with red colored pigments, the mixtures can experience significant color shifts. In the presentation, the optical properties of both white pigments are compared.