Patent ID: 7441883

Claim:
A process for producing an inkjet ink composition, which comprises dispersing a coloring material in a non-aqueous solvent with a dispersant having no coloring material-dispersing property, the coloring material being covered with a resin insoluble in the non-aqueous solvent, wherein the dispersant is a graft polymer comprising a repeating unit of formula (1) in a main chain of the graft polymer: wherein R represents a hydrogen atom or a methyl group; X represents a halogen atom, OR 1 , —COOR 1 , —CON(R 1 )(R 2 ) or —OCOR 1 ; R 1 represents an organic group having a carbon number of 1 to 10; and R 2 represents a hydrogen atom or an organic group having a carbon number of 1 to 10.