Dispersion of water-insoluble colorant, method of producing substance containing water-insoluble colorant, fine particles of water-insoluble colorant, dispersing agent for water-insoluble colorant, and recording liquid, ink set, printed article, method of forming image and image forming apparatus using the same

摘要

A dispersion of a water-insoluble colorant containing: a medium containing water; fine particles of the water-insoluble colorant; and a polymer compound or a surfactant that includes at least one kind of electron-withdrawing group or group of atoms represented by any one of formulae (I) to (IV) as its hydrophilic part:
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wherein at least one of X<Sub>1</Sub> and X<Sub>2</Sub> represents an electron-withdrawing linking group on the condition that when at least one of X<Sub>1</Sub> and X<Sub>2</Sub> is not the linking group, the at least one of X<Sub>1</Sub> and X<Sub>2</Sub> represents an electron-withdrawing substituent; R<Sub>1</Sub> represents a hydrogen atom or a substituent; and M represents a hydrogen atom or a metal atom.