The present invention provides an anti-counterfeit ink composition including organic-inorganic hybrid infrared absorbing particles, and either a dispersant or a surfactant, or both, wherein the organic-inorganic hybrid infrared absorbing particles include infrared absorbing particles and a coating resin that covers at least a part of a surface of the infrared absorbing particles.

The present invention provides an anti-counterfeit ink composition including organic-inorganic hybrid infrared absorbing particles, and either a dispersant or a surfactant, or both, wherein the organic-inorganic hybrid infrared absorbing particles include infrared absorbing particles and a coating resin that covers at least a part of a surface of the infrared absorbing particles.

A conductive paste composition includes a conductive powder (A) and a resin component (B). A silver-based powder containing at least silver is used as the conductive powder (A), at least one of a thermosetting resin and a thermoplastic resin is used as the resin component (B). The conductive paste composition further contains a specific ester-based compound (C) having a molecular weight within a range of 150 to 2000 or a specific ether/amine-based compound (D) having a molecular weight within the range of from 150 to 30,000.

A conductive paste composition includes a conductive powder (A) and a resin component (B). A silver-based powder containing at least silver is used as the conductive powder (A), at least one of a thermosetting resin and a thermoplastic resin is used as the resin component (B). The conductive paste composition further contains a specific ester-based compound (C) having a molecular weight within a range of 150 to 2000 or a specific ether/amine-based compound (D) having a molecular weight within the range of from 150 to 30,000.

A pigment composition for a pigment contained in ink or the like is provided, the pigment composition being capable of better preventing oxidation of the pigment from occurring in the ink or after printing, and better reducing discoloration of the pigment, even when the pigment has a small particle size such as a nanometer size. Further, a tablet and a capsule are provided. For example, the pigment composition includes: a black iron oxide; a dispersion medium; a dispersant; and an oxidation inhibitor, wherein the black iron oxide has a median diameter D50 of 30 nm or greater and 1 μm or less, and the oxidation inhibitor is reduced isomaltulose.

A pigment composition for a pigment contained in ink or the like is provided, the pigment composition being capable of better preventing oxidation of the pigment from occurring in the ink or after printing, and better reducing discoloration of the pigment, even when the pigment has a small particle size such as a nanometer size. Further, a tablet and a capsule are provided. For example, the pigment composition includes: a black iron oxide; a dispersion medium; a dispersant; and an oxidation inhibitor, wherein the black iron oxide has a median diameter D50 of 30 nm or greater and 1 μm or less, and the oxidation inhibitor is reduced isomaltulose.

A method of producing an image recorded material is a method including an image recording of sequentially applying a pretreatment liquid containing an aggregating agent, a first ink containing a first resin, and a second ink containing a second resin onto an impermeable base material to record an image, in which in the image recording, the image is recorded under a condition in which a ratio of a total applied mass of the first resin and the second resin per unit area to an applied mass of the aggregating agent per unit area in an overlapping region formed such that a region where the pretreatment liquid is applied, a region where the first ink is applied, and a region where the second ink is applied overlap each other in plan view is generated is 16.0 or greater and 30.0 or less.

A method of producing an image recorded material is a method including an image recording of sequentially applying a pretreatment liquid containing an aggregating agent, a first ink containing a first resin, and a second ink containing a second resin onto an impermeable base material to record an image, in which in the image recording, the image is recorded under a condition in which a ratio of a total applied mass of the first resin and the second resin per unit area to an applied mass of the aggregating agent per unit area in an overlapping region formed such that a region where the pretreatment liquid is applied, a region where the first ink is applied, and a region where the second ink is applied overlap each other in plan view is generated is 16.0 or greater and 30.0 or less.

A dye ink composition includes: a coloring agent, water, and a compound represented by the general formula (III) as defined herein, in which the coloring agent contains at least one dye selected from the group consisting of a dye represented by the general formula (I) as defined herein and a dye represented by the general formula (II) as defined herein.

A dye ink composition includes: a coloring agent, water, and a compound represented by the general formula (III) as defined herein, in which the coloring agent contains at least one dye selected from the group consisting of a dye represented by the general formula (I) as defined herein and a dye represented by the general formula (II) as defined herein.