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.

Provided is a composition having moderate viscosity for coating properties and ejection properties, being applicable for firing at low temperatures, and leaving an extremely small amount of ash after firing. The composition of the present disclosure contains a miscible material of a compound represented by Formula (1) below and a compound (A) represented by Formula (A) below. In Formula (1) below, R.sup.1 represents a linear aliphatic hydrocarbon group having from 10 to 25 carbons; R.sup.2 and R.sup.3 are identical or different and represent an aliphatic hydrocarbon group having 2, 4, 6, or 8 carbons; R.sup.4 represents an aliphatic hydrocarbon group having from 1 to 8 carbons; R.sup.5 and R.sup.6 are identical or different and represent an aliphatic hydrocarbon group having from 1 to 3 carbons or a hydroxyalkyl ether group; and L.sup.1 to L.sup.3 represent an amide bond. In Formula (A) below, in the formula, R.sup.a and R.sup.c are identical or different and represent a hydrogen atom or an aliphatic hydrocarbon group that has from 1 to 12 carbons and may have a substituent; R.sup.b represents an aliphatic hydrocarbon group that has from 1 to 12 carbons and may have a substituent; and the substituents are each an amino group and/or a hydroxyl group.

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##

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##

An ink composition includes: a quantum dot including one or more ligands on a surface thereof; a first monomer including one or more epoxy groups; and a second monomer including one or more oxetane groups, wherein the one or more ligands include one or more polar moieties. An electronic apparatus includes a film formed utilizing the ink composition.

An ink composition includes: a quantum dot including one or more ligands on a surface thereof; a first monomer including one or more epoxy groups; and a second monomer including one or more oxetane groups, wherein the one or more ligands include one or more polar moieties. An electronic apparatus includes a film formed utilizing the ink composition.

Optically active formulations useful as inks in extrusion-based deposition techniques and solids formed of the formulations are described. Formulations include a cellulose derivative in a chiral nematic phase and a polyethylene glycol interspersed with the cellulose derivative as stabilization to the cholesteric pitch of the chiral nematic phase. The inks can be utilized in direct ink writing processes to produce printed films or three-dimensional structures with long-lasting colors that stem from the nanostructure of the chiral nematic phase. The ink can include reactive monomers which can be polymerized to create optically active solid elastomers.

Optically active formulations useful as inks in extrusion-based deposition techniques and solids formed of the formulations are described. Formulations include a cellulose derivative in a chiral nematic phase and a polyethylene glycol interspersed with the cellulose derivative as stabilization to the cholesteric pitch of the chiral nematic phase. The inks can be utilized in direct ink writing processes to produce printed films or three-dimensional structures with long-lasting colors that stem from the nanostructure of the chiral nematic phase. The ink can include reactive monomers which can be polymerized to create optically active solid elastomers.

Provided are an aqueous fluorescent ink with which a fluorescent color image having an excellent color developability and lightfastness can be recorded, and an ink cartridge and an ink jet recording method using this aqueous fluorescent ink. The aqueous fluorescent ink contains a resin particle dyed with a fluorescent dye, and a quinacridone pigment. The fluorescent dye includes a basic dye having a xanthene skeleton. The resin particle has a cyano group-containing unit. A mass ratio of a content (% by mass) of the quinacridone pigment to a content (% by mass) of the fluorescent dye is 1.0 times or less. The ink cartridge includes an ink storage portion storing this aqueous fluorescent ink. An image is recorded onto a recording medium by the ink jet recording method comprising ejecting the aqueous fluorescent ink from an ink jet recording head.

Provided are an aqueous fluorescent ink with which a fluorescent color image having an excellent color developability and lightfastness can be recorded, and an ink cartridge and an ink jet recording method using this aqueous fluorescent ink. The aqueous fluorescent ink contains a resin particle dyed with a fluorescent dye, and a quinacridone pigment. The fluorescent dye includes a basic dye having a xanthene skeleton. The resin particle has a cyano group-containing unit. A mass ratio of a content (% by mass) of the quinacridone pigment to a content (% by mass) of the fluorescent dye is 1.0 times or less. The ink cartridge includes an ink storage portion storing this aqueous fluorescent ink. An image is recorded onto a recording medium by the ink jet recording method comprising ejecting the aqueous fluorescent ink from an ink jet recording head.