Inkjet ink

An inkjet ink comprising:

• a pigment dispersion containing an organic dispersant, a cyan pigment having an average particle diameter of not more than 200 nm, and a resinous dispersing agent, the organic dispersant being formed of at least one polymerizable compound, and the cyan pigment being included therein at an amount ranging from 2 to 30% by weight based on the organic dispersant;
• and
• an ionic compound;
• wherein a ζ-potential of the cyan pigment to the at least one polymerizable compound of the organic dispersant is confined within the range of +30 mV to +100 mV.

An inkjet ink comprising:

• a pigment dispersion containing an organic dispersant, a yellow pigment having an average particle diameter of not more than 200 nm, and a resinous dispersing agent, the organic dispersant being formed of at least one polymerizable compound, and the yellow pigment being included therein at an amount ranging from 2 to 30% by weight based on the organic dispersant;
• and
• an ionic compound;
• wherein a ζ-potential of the yellow pigment to the at least one polymerizable compound of the organic dispersant is confined within the range of −15 mV to +100 mV.

An inkjet ink comprising:

• a pigment dispersion containing an organic dispersant, a white pigment having an average particle diameter of not more than 300 nm, and a resinous dispersing agent, the organic dispersant being formed of at least one polymerizable compound, and the white pigment being included therein at an amount ranging from 2 to 50% by weight based on the organic dispersant;
• and
• an ionic compound;
• wherein a ζ-potential of the white pigment to the at least one polymerizable compound of the organic dispersant is confined within the range of +40 mV to +100 mV.