Ti-Pure R-931 Rutile titanium dioxide DuPont Titanium Technologies Color pigment & dye Filler >> Titanium dioxide Architectural / Decorative Ti-Pure® R-931 is a rutile titanium dioxide pigment designed to provide maximum hiding in high-quality, high-PVC architectural coatings. It is manufactured by the chloride process and has the following general properties. Ti-Pure® R-931 is a pigment with an excellent balance of hiding power and film integrity in emulsion and solvent flat paints. It is most efficient in coatings of 45–60 PVC with TiO2 loading of 2 lb/gal (0.24 kg/L) or higher. The surface oxide treatment provides optical spacing in crowded systems, so that TiO2 efficiency is maximized while maintaining the highest level of film integrity. Rutile titanium dioxide. Used in architectural coatings. Possesses very good balance of hiding power and film integrity.