An ink jet recording apparatus includes an ink composition, an ink encasement in which the ink composition is encased, a recording head that ejects the ink composition, and a carriage configured to move the recording head back and forth. The carriage carries the ink encasement, with the ink encasement integrated with the carriage. The ink encasement has an ink fill port that opens and shuts as a port through which the ink composition is loaded. The ink composition contains a water-soluble dye and a polyhydric alcohol with a normal boiling point of 270° C. or above, with the percentage of the polyhydric alcohol being 26.0% by mass or less of the total amount of the ink composition.

An object is to provide an ink-jet ink satisfying rapid-drying properties, long decap time, and intermittent long-run printability. The object can be achieved by an ink-jet ink comprising an organic solvent, a surfactant, and a coloring material, wherein the organic solvent contains 1,3-dioxolane.

An object is to provide an ink-jet ink satisfying rapid-drying properties, long decap time, and intermittent long-run printability. The object can be achieved by an ink-jet ink comprising an organic solvent, a surfactant, and a coloring material, wherein the organic solvent contains 1,3-dioxolane.

An ink jet composition of the present disclosure includes: water; a polyester resin having sulfo groups; and a colorant, the colorant is contained in particles formed from a material containing the polyester resin, and the sulfo groups have a high abundance ratio at a surface of each of the particles as compared to that at a center thereof.

An ink jet composition of the present disclosure includes: water; a polyester resin having sulfo groups; and a colorant, the colorant is contained in particles formed from a material containing the polyester resin, and the sulfo groups have a high abundance ratio at a surface of each of the particles as compared to that at a center thereof.

An example of an inkjet ink composition includes an aqueous vehicle, a colorant dispersed or dissolved in the aqueous vehicle, silica nanoparticles dispersed in the aqueous vehicle, and modified silica nanoparticles dispersed in the aqueous vehicle. Each modified silica nanoparticle includes a silica core as well as a hydrophobic silane coupling agent attached to the silica core.

An example of an inkjet ink composition includes an aqueous vehicle, a colorant dispersed or dissolved in the aqueous vehicle, silica nanoparticles dispersed in the aqueous vehicle, and modified silica nanoparticles dispersed in the aqueous vehicle. Each modified silica nanoparticle includes a silica core as well as a hydrophobic silane coupling agent attached to the silica core.

An ink jet composition of the present disclosure includes water; a polyester resin having sulfo groups; and a colorant, the colorant is contained in particles formed from a material containing the polyester resin, and the particles have an average particle diameter of 100 nm or less and are contained in the ink jet composition at a content rate of 15 percent by mass or more.

An ink jet composition of the present disclosure includes water; a polyester resin having sulfo groups; and a colorant, the colorant is contained in particles formed from a material containing the polyester resin, and the particles have an average particle diameter of 100 nm or less and are contained in the ink jet composition at a content rate of 15 percent by mass or more.

An ink jet textile printing ink composition contains a sulfonic acid group-containing dye having a ligand coordinated to a metal atom, the ligand being represented by Formula (1) below: ##STR00001## wherein at least one of R.sub.1 and R.sub.3 represents SO.sub.3.sup.− or SO.sub.3Y, where Y represents a hydrogen atom, an alkali metal atom, or an alkaline earth metal atom; when not representing SO.sub.3.sup.− or SO.sub.3Y, R.sub.1 and R.sub.3 represent a halogen atom or a hydrogen atom; R.sub.2 and R.sub.4 each independently represent a hydrogen atom, a halogen atom, a sulfo group, a nitro group, an aryl group, a sulfonamide group, a carboxy group, an alkyl group of 1 to 4 carbon atoms, SO.sub.2NHR.sub.5, or COOR.sub.5, where R.sub.5 represents a hydrogen atom or an alkyl group; and X represents a metal atom.