A method for manufacturing platelet-shaped effect pigments includes the steps of a) providing a carrier substrate; b) applying aqueous washing ink droplets to the carrier substrate in first regions forming a first motif; c) applying a reflective coating to the carrier substrate such that a reflective coating is deposited on the carrier substrate in the form of a regular contiguous grid in second regions forming a second motif outside the first regions forming the first motif, wherein the first regions form the first motif and have the washing ink droplets form regular islands within the regular contiguous grid, and a reflective coating is deposited above the washing ink droplets in the first regions forming the first motif; and d) removing the washing ink droplets in the first regions together with the reflective coating present thereon and isolating the removed reflective coating in the form of platelet-shaped effect pigments.

An ink composition for use in digital offset printing including at least one component selected from the group consisting of a curable monomer and a curable oligomer; an optional dispersant; an optional photoinitiator; and at least one non-radiation curable additive, wherein the non-radiation curable additive is a detergent or an emulsifying agent, or wherein the non-radiation curable additive functions as a detergent or emulsifying agent when in the presence of a cleaning fluid, and wherein the non-radiation curable additive is a solid at a temperature of from about 20° C. to about 40° C.

An ink composition for use in digital offset printing including at least one component selected from the group consisting of a curable monomer and a curable oligomer; an optional dispersant; an optional photoinitiator; and at least one non-radiation curable additive, wherein the non-radiation curable additive is a detergent or an emulsifying agent, or wherein the non-radiation curable additive functions as a detergent or emulsifying agent when in the presence of a cleaning fluid, and wherein the non-radiation curable additive is a solid at a temperature of from about 20° C. to about 40° C.

An ink set includes an ink-jet color ink that contains a colorant, an organic solvent, a polymerizable compound, and a photopolymerization initiator and a clear ink which contains an organic solvent and a vinyl chloride-vinyl acetate copolymer and in which Mt2/Mt1 is 0.40 or more where Mt1 represents a total mass content of a nonvolatile component, and Mt2 represents a mass content of the vinyl chloride-vinyl acetate copolymer.

The present invention relates to [1] a process for producing a pigment water dispersion liquid of polymer particles containing an azomethine metal complex pigment (A), said process including the step of subjecting a mixture containing the azomethine metal complex pigment (A), an uncrosslinked aromatic group-containing polymer (b) and water to dispersion treatment using a medialess disperser at an accumulated input energy of not more than 5.0 kWh/kg, [2] a pigment water dispersion liquid containing an azomethine metal complex pigment (A) and a polymer dispersant (B), in which in an optical absorption spectrum of the pigment water dispersion liquid, a ratio of a maximum absorbance (A1.sub.max) in a wavelength range of not less than 440 nm and less than 465 nm to a maximum absorbance (A2.sub.max) in a wavelength range of not less than 420 nm and less than 440 nm [(A1.sub.max)/(A2.sub.max)] is not less than 1.000, and [3] a water-based ink for ink-jet printing, containing the aforementioned pigment water dispersion liquid.

An aqueous ink jet composition includes a first component which is at least one selected from the group consisting of C.I. Solvent Yellow 160: 1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a second component which is a dispersant having at least one chemical structure of a sulfo group and a salt thereof; and a third component which has a coumarin skeleton and at least one chemical structure of a sulfo group and a salt thereof.

A composition including a molecule comprising (1) a diacetylene moiety or diacetylene precursor; and (2) an alkyl additive; water; an optional co-solvent; an optional surfactant; an optional stabilizer; wherein the composition has the characteristic of color change after application of a stimulus. A process for preparing the composition. A process for preparing a product by printing the composition.

A press-through packaging material is disclosed including, in sequence, a substrate, an opaque underlayer laminated on at least a part of the surface of the substrate, and a printing layer that contains a colored metal pigment, and that is formed on at least a part of the surface of the opaque underlayer. The colored metal pigment includes a metal pigment, an amorphous silicon oxide film layer formed on the surface of the metal pigment, and metal particles supported on a part of or on the entire surface of the amorphous silicon oxide film layer, the opaque underlayer having a mass per unit area of 0.5 g/m.sup.2 or more and 3.0 g/m.sup.2 or less, and the printing layer having a mass per unit area of 1.0 g/m.sup.2 or more and 3.5 g/m.sup.2 or less.

A recording method includes an adhesion step of ejecting an ink composition from an ink jet head to be adhered to a recording medium; and a primary heating step of heating the adhered ink composition, and the adhesion step includes at least one main scanning in which while a relative position of the ink jet head and the recording medium is changed in a main scanning direction, the ink composition is adhered to the recording medium and at least one sub-scanning in which the relative position of the ink jet head and the recording medium is changed in a sub-scanning direction. In the recording method described above, the number of the main scannings performed on the same recording region of the recording medium is 5 or less, the ink composition is a water-based ink containing a pigment, a resin, and an organic solvent, and in a chart of logarithmic attenuation with temperature obtained by measurement of the ink composition using a rigid-body pendulum characteristics test, the ink composition has a temperature of a first thickening peak of 30° C. to 65° C. and a temperature of a maximum thickening peak of 70° C. or more.

An ink includes a first non-aqueous solvent and a polymer selected from among a polyethylenimine, an ethoxylated polyethylenimine, a perfluoroanthracene, and one or a plurality of conjugated thiols.