An ink set includes a reaction liquid containing coagulant; a first ink containing a color material; and a second ink containing a color material. The ink set is used for recording on a non-absorptive recording medium or a low-absorptive recording medium and for imparting the reaction liquid, the first ink, and the second ink to the recording medium in a superimposed manner in this order.

An aqueous pigment dispersion includes at least one dispersing agent having the general formula: ##STR00001## The aqueous pigment dispersion can be used in an aqueous inkjet ink which is useful for printing on textile fabrics.

An aqueous pigment dispersion includes at least one dispersing agent having the general formula: ##STR00001## The aqueous pigment dispersion can be used in an aqueous inkjet ink which is useful for printing on textile fabrics.

An active energy ray curable inkjet ink comprising a pigment (A), a colorant derivative (B), a pigment dispersing resin (C) and a polymerizable compound (D), wherein the pigment (A) contains a C.I. pigment blue 15:6 and a quinacridone-based pigment at a specific amount and a specific ratio, the colorant derivative (B) contains a quinacridone-based pigment derivative, and the pigment dispersing resin (C) has an acid value and an amine value in a specific range.

An active energy ray curable inkjet ink comprising a pigment (A), a colorant derivative (B), a pigment dispersing resin (C) and a polymerizable compound (D), wherein the pigment (A) contains a C.I. pigment blue 15:6 and a quinacridone-based pigment at a specific amount and a specific ratio, the colorant derivative (B) contains a quinacridone-based pigment derivative, and the pigment dispersing resin (C) has an acid value and an amine value in a specific range.

In one aspect the present disclosure relates to an aqueous inkjet ink composition comprising a yellow azo pigment, a pigment synergist, a polymeric dispersant, 5 to 20 wt % of a latex polymer, 5 to 40 wt % of an organic co-solvent that has a boiling point of a boiling point in the range of about 170° C. to about 285° C., and water. The pigment synergist comprises a pigment of the formula (I): ##STR00001##
where each of R.sub.1 to R.sub.10 is each independently selected from H, carboxylate, and/or a sulphonate group.

In one aspect the present disclosure relates to an aqueous inkjet ink composition comprising a yellow azo pigment, a pigment synergist, a polymeric dispersant, 5 to 20 wt % of a latex polymer, 5 to 40 wt % of an organic co-solvent that has a boiling point of a boiling point in the range of about 170° C. to about 285° C., and water. The pigment synergist comprises a pigment of the formula (I): ##STR00001##
where each of R.sub.1 to R.sub.10 is each independently selected from H, carboxylate, and/or a sulphonate group.

An ink-jet ink composition includes: a solvent; a pigment comprising a first powder, the surface of which, in the solvent, bears a first charge; an ionic polymer having a second charge, which is counter to the first charge; and polyvalent ions having the first charge. The ink composition has a surface tension of 53 mN/m or less.

An ink-jet ink composition includes: a solvent; a pigment comprising a first powder, the surface of which, in the solvent, bears a first charge; an ionic polymer having a second charge, which is counter to the first charge; and polyvalent ions having the first charge. The ink composition has a surface tension of 53 mN/m or less.

An ink set includes a pigment ink, containing a pigment, and a dye ink containing the compound represented by formula (y-1) below or a salt thereof. ##STR00001##