There is provided a non-aqueous ink jet ink composition, including a pigment, a non-aqueous solvent, and a surfactant, in which the ink composition contains an acetylene glycol-based surfactant having a HLB value of 1.0 to 6.0 as the surfactant.

An ink jet recording method comprising ejecting an ink from a recording head to record an image on a recording medium using an ink jet recording apparatus. The ink jet recording apparatus includes a main tank, a sub tank, and a recording head. The ratio of the maximum ink storage amount of the main tank to the maximum ink storage amount of the sub tank is 3.0 or more to 50.0 or less. The ink contains a pigment and a particular water-soluble organic solvent. The ratio of the water-soluble organic solvent content to the pigment content is 2.0 or more to 10.0 or less. The ink has a temperature at which the ratio of the viscosity of the ink in the recording head to the viscosity of the ink at a temperature of 25° C. is 0.8 or less.

An ink jet recording method comprising ejecting an ink from a recording head to record an image on a recording medium using an ink jet recording apparatus. The ink jet recording apparatus includes a main tank, a sub tank, and a recording head. The ratio of the maximum ink storage amount of the main tank to the maximum ink storage amount of the sub tank is 3.0 or more to 50.0 or less. The ink contains a pigment and a particular water-soluble organic solvent. The ratio of the water-soluble organic solvent content to the pigment content is 2.0 or more to 10.0 or less. The ink has a temperature at which the ratio of the viscosity of the ink in the recording head to the viscosity of the ink at a temperature of 25° C. is 0.8 or less.

A set of compositions for ink jet textile printing includes an ink composition and a coating composition, the ink composition containing a pigment, resin particles, and water, and the coating composition containing resin particles and water. The resin particles contained in the ink composition contain any of a urethane resin, a polycarbonate resin, an acrylic resin, and a styrene resin. The amount of the resin particles in the ink composition is from 1 to 5 parts by mass on a solids basis per part by mass of the pigment on a solids basis. The Young's modulus of dried film of the ink composition is from 1 to 25 MPa, and that of dried film of the coating composition is 50 MPa or less and higher than that of dried film of the ink composition.

A set of compositions for ink jet textile printing includes an ink composition and a coating composition, the ink composition containing a pigment, resin particles, and water, and the coating composition containing resin particles and water. The resin particles contained in the ink composition contain any of a urethane resin, a polycarbonate resin, an acrylic resin, and a styrene resin. The amount of the resin particles in the ink composition is from 1 to 5 parts by mass on a solids basis per part by mass of the pigment on a solids basis. The Young's modulus of dried film of the ink composition is from 1 to 25 MPa, and that of dried film of the coating composition is 50 MPa or less and higher than that of dried film of the ink composition.

There are provided an aqueous pigment dispersion containing a pigment, hydrophilic fumed silica, and an aqueous medium; an ink jet recording ink containing such an aqueous pigment dispersion; and a printed article using the aqueous pigment dispersion. The average particle size of the hydrophilic fumed silica is preferably not more than 250 nm. The amount of the hydrophilic fumed silica is preferably in the range of 20 to 300 mass % relative to the amount of the pigment. The amount of the pigment is preferably in the range of 0.5 to 30 mass % relative to the amount of the whole aqueous pigment dispersion.

There are provided an aqueous pigment dispersion containing a pigment, hydrophilic fumed silica, and an aqueous medium; an ink jet recording ink containing such an aqueous pigment dispersion; and a printed article using the aqueous pigment dispersion. The average particle size of the hydrophilic fumed silica is preferably not more than 250 nm. The amount of the hydrophilic fumed silica is preferably in the range of 20 to 300 mass % relative to the amount of the pigment. The amount of the pigment is preferably in the range of 0.5 to 30 mass % relative to the amount of the whole aqueous pigment dispersion.

Examples provide inkjet ink sets and related methods. An ink set may include a pre-treatment fixing fluid, an ink, and a post-treatment fluid including a wax and a binder present in the post-treatment fluid in a range of about 10 weight percent to about 30 weight percent.

Examples provide inkjet ink sets and related methods. An ink set may include a pre-treatment fixing fluid, an ink, and a post-treatment fluid including a wax and a binder present in the post-treatment fluid in a range of about 10 weight percent to about 30 weight percent.

An ink jet textile printing ink set of the present disclosure includes an ink composition and a process liquid composition, wherein the process liquid composition contains a cationic compound and a compound having one quaternary ammonium in its molecule, and the ink composition contains a pigment and an organic solvent, where the organic solvent is a polyhydric alcohol solvent and the content thereof is 10.0 mass % or more and 55.0 mass % or less.