Provided is an ink jet liquid composition including an organic solvent, a bifunctional urethane (meth)acrylate oligomer having a weight-average molecular weight of 2,000 to 15,000, a photopolymerization initiator, and a vinyl chloride-vinyl acetate copolymer, in which a content of the organic solvent is 40% by mass or more and 90% by mass or less with respect to a total mass of the liquid composition. Also provided is an ink jet recording method using the ink jet liquid composition.

Provided is an ink set including: a first ink that is white and contains water, hollow resin particles, and at least one organic solvent; and a second ink that contains water and at least one organic solvent and is to be applied on a first image formed with the first ink to form a second image, wherein an average thickness difference (A-B) between an average thickness (A) of the first image before the second ink is applied and an average thickness (B) of a white region in the first image after the second image is formed is 1 μm or greater but 3 μm or less.

Provided is an ink set including: a first ink that is white and contains water, hollow resin particles, and at least one organic solvent; and a second ink that contains water and at least one organic solvent and is to be applied on a first image formed with the first ink to form a second image, wherein an average thickness difference (A-B) between an average thickness (A) of the first image before the second ink is applied and an average thickness (B) of a white region in the first image after the second image is formed is 1 μm or greater but 3 μm or less.

An ink set includes an ink A including water, a first organic solvent, and a first pigment and an ink B including water, a second organic solvent, a second pigment, and a urethane resin particle. The first organic solvent includes at least one of N,N-dimethyl-β-buthoxy propionamide, N,N-dimethyl-β-methoxy propionamide, and 3-ethyl-3-hydroxymethyl oxetane and has a mixing solubility parameter A of 10.00 to less than 13.00 and the second organic solvent has a mixing solubility parameter B of 13.00 to 16.00.

An ink set includes an ink A including water, a first organic solvent, and a first pigment and an ink B including water, a second organic solvent, a second pigment, and a urethane resin particle. The first organic solvent includes at least one of N,N-dimethyl-β-buthoxy propionamide, N,N-dimethyl-β-methoxy propionamide, and 3-ethyl-3-hydroxymethyl oxetane and has a mixing solubility parameter A of 10.00 to less than 13.00 and the second organic solvent has a mixing solubility parameter B of 13.00 to 16.00.

The present invention relates to an inkjet ink comprising a photo-chromic colorant and a UV absorber. The ink may be used as a time-temperature indicator and is particularly useful in packaging food and/or drink to provide an indication of the quality of the contents.

An inkjet recording method for printing an inkjet recording medium comprising an ink-receiving layer containing inorganic pigment, starch and copolymer latex on a surface of a base with inkjet ink as aqueous pigment ink, a content of the inorganic pigment being 10 g/m.sup.2 or more to 35 g/m.sup.2 or less in the ink-receiving layer,and a content of calcium carbonate being from 80% by weight or more to 100% by weight or less, the inkjet ink containing one or more selected from self dispersed pigment and pigment containing water-insoluble polymer particles, from 10% by weight or more to 48% by weight or less of a water-soluble organic solvent A having a boiling point of 230° C. or less, from 0% by weight or more to 5.0% by weight or less of a water-soluble organic solvent B having a boiling point of 280° C. or more, from 42% by weight or more to 70% by weight or less of water.

A non-Newtonian photo-curable ink composition that comprises a structured network forming agent in an amount ranging from about 0.1 wt % to about 20 wt % by total weight of the ink composition; a salt in an amount ranging from about 0.05 wt % to about 20 wt % by total weight of the ink composition; an organic solvent; a photo-initiator; and a polymerizable material; wherein the ink composition has a first dynamic viscosity ranging from 25 cps to 10,000 cps at a first state and a second dynamic viscosity ranging from 1 cps to 50 cps at a second state. Also described herein is a method for making such non-Newtonian photo-curable ink composition and a method for producing printed images using such non-Newtonian photo-curable ink composition.

A non-Newtonian photo-curable ink composition that comprises a structured network forming agent in an amount ranging from about 0.1 wt % to about 20 wt % by total weight of the ink composition; a salt in an amount ranging from about 0.05 wt % to about 20 wt % by total weight of the ink composition; an organic solvent; a photo-initiator; and a polymerizable material; wherein the ink composition has a first dynamic viscosity ranging from 25 cps to 10,000 cps at a first state and a second dynamic viscosity ranging from 1 cps to 50 cps at a second state. Also described herein is a method for making such non-Newtonian photo-curable ink composition and a method for producing printed images using such non-Newtonian photo-curable ink composition.

An active-energy-ray-curable composition, a cured material of the active-energy-ray-curable composition satisfying a critical load of 5.0 g or more but 25.0 g or less, the critical load being obtained by a continuous loading test method using a variable normal load friction and wear measurement device, the cured material having an average thickness of 10 μm and being formed by coating the active-energy-ray-curable composition on a substrate and by irradiating and curing the active-energy-ray-curable composition with active energy rays having illuminance of 1.5 W/cm.sup.2 and an amount of irradiation of 200 mJ/cm.sup.2.