Abstract: A water-based inkjet ink for tampering prevention which readily allows detection of evidence of tampering by visual inspection using a variety of organic solvents on the written content of a printed article for financial securities or the like, a method for inkjet printing using the same, and a printed article. The water-based inkjet ink for tampering detection contains at least one type of disperse or oil-soluble dye which includes no cyano groups or azo groups, at least one type of dispersing agent, at least one type of water-soluble organic solvent and water.

Abstract: A dye ink set for ink jet recording, which has a wide color gamut, particularly for the hue range of magenta, blue, and cyan, and which has good ejection stability properties. The ink set includes ink compositions of two colors, a magenta ink composition and a cyan ink composition which contain a dye, water, and a water-soluble organic solvent, and the magenta ink composition contains a compound represented by formula (1) below or a salt thereof.

Abstract: A water-based inkjet ink for tampering prevention which readily allows detection of evidence of tampering by visual inspection using a variety of organic solvents on the written content of a printed article for financial securities or the like, a method for inkjet printing using the same, and a printed article. The water-based inkjet ink for tampering detection contains at least one type of disperse or oil-soluble dye which includes no cyano groups or azo groups, at least one type of dispersing agent, at least one type of water-soluble organic solvent and water.

Abstract: An ink set for inkjet recording, which has excellent water resistance and light resistance in the hue range of yellow-orange-magenta. The ink set includes two-color ink compositions, i.e., a) a magenta ink composition and b) an yellow ink composition, each of which includes a dye, water and a water-soluble organic solvent, wherein the magenta ink composition a) contains a compound produced by sulfonating a compound represented by the formula (1), a salt of the compound, or a mixture thereof as a coloring agent.

Abstract: A dye ink set for ink jet recording, which has a wide color gamut, particularly for the hue range of magenta, blue, and cyan, and which has good ejection stability properties. The ink set includes ink compositions of two colors, a magenta ink composition and a cyan ink composition which contain a dye, water, and a water-soluble organic solvent, and the magenta ink composition contains a compound represented by formula (1) below or a salt thereof.

Abstract: Provided are an original printing plate for relief printing that solves both the problems of the prior-art negative film or its alternatives, and problems of mask pattern formation directly on the surface of the photosensitive resin layer by an ink composition, as well as a method for forming an relief printing plate using the same.

Abstract: The present invention relates to an aqueous dispersion of a water-insoluble coloring material having superior shelf life stability which is suitable to an ink for ink-jetting, an ink composition superior in shelf life stability and discharge property, a method for inkjet recording using said ink composition, and recorded article obtained thereby. Said aqueous dispersion is characterized by comprising a water-insoluble coloring material, water, an anionic dispersing agent, and an alkylene oxide adduct of phytosterols and/or an alkylene oxide adduct of cholestanols, and said ink composition is characterized by further comprising an organic solvent in addition to the above components.

Abstract: The present invention relates to an aqueous dispersion of a water-insoluble coloring material having superior shelf life stability which is suitable to an ink for ink-jetting, an ink composition superior in shelf life stability and discharge property, a method for inkjet recording using said ink composition, and recorded article obtained thereby. Said aqueous dispersion is characterized by comprising a water-insoluble coloring material, water, an anionic dispersing agent, and an alkylene oxide adduct of phytosterols and/or an alkylene oxide adduct of cholestanols, and said ink composition is characterized by further comprising an organic solvent in addition to the above components.

Abstract: Provided are an original printing plate for relief printing that solves both the problems of the prior-art negative film or its alternatives, and problems of mask pattern formation directly on the surface of the photosensitive resin layer by an ink composition, as well as a method for forming an relief printing plate using the same.