Nippon Kayaku Kabushiki Kaisha

Eastman-kodak Company

Tadahiko Tabe

Yoshiki Akatani

Yuji Suzuki

Takashi Fujimoto

Toshiya Takagi

Mariko Umeda

Katsunori Fujii

Shinsuke Shimizu

Yoshiyuki Dejima

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.

Water-based inkjet ink for tampering detection, method for inkjet printing using same, and printed article

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. 

Ink set for inkjet recording, recording method, and colored body using same

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. Employing a photosensitive original printing plate for relief printing including a support substrate (A); a photosensitive resin layer (B) provided thereon and having a photosensitivity to light in a predetermined wavelength region; and an ink holding layer (C) provided thereon; wherein the layer (C) is capable of retaining a light-shielding ink, and capable of constituting a light-shielding pattern inside the layer (C), the light-shielding pattern being formed by applying the light-shielding ink to the (C) in accordance with the pattern; and wherein the (C) at the area to which the light-shielding ink is not applied is substantially transparent to the light in the predetermined wavelength region.

Photosensitive original printing plate for relief printing, method for producing relief printing plate, and light-shielding ink for performing the method

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.

Growing community of inventors

Tokyo, Japan

Tadahiko Tabe