Patent ID: 6989054

Claim:
A titanium dioxide slurry for ink jet ink, which comprises water and surface-treated titanium dioxide particles dispersed in said water, said slurry having a concentration of said surface-treated titanium dioxide particles of from 30 to 70% by weight, said surface treatment being a treatment with an inorganic phosphoric acid compound, wherein said surface-treated titanium dioxide particles having a dispersed particle diameter distribution satisfying the following relationships: 0.1≦d 10 <0.15 (μm), 0.15≦d 50 <0.25 (μm), and 0.25≦d 90 <0.4 (μm) wherein d 10 , d 50 and d 90 denote particle diameters corresponding to cumulative weight fractions of 10%, 50% and 90%, respectively.