pigment dispersion

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Title: Process for the preparation of pigment dispersion, pigment dispersion obtained by the same, ink jet recording ink comprising the same, and recording method and recorded material using the same Date: // Applicants: Name: Ota Hitoshi City: Nagano State: Country: JP Assignees: Organization Name: Seiko Epson Corporation City: Tokyo State: Country: JP Abstract: Provided is a process for the preparation of a pigment dispersion which comprises a pigment surface treatment step of introducing at least one hydrophilic dispersibility-provid ing group onto the surface of a pigment directly and/or with the interposition of a polyvalent group, and a dispersion step of dispersing a surface- treated pigment obtained at the surface treatment step in an aqueous medium, characterized in that the dispersion step

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