Abstract: Nutritional or ingestible ink composition for ink jet printing comprising: a binder comprising at least 0.5% by weight, with respect to the total weight of the ink, of at least one zein; a solvent comprising at least 10% by weight, with respect to the total weight of the ink, of one or more nutritional or ingestible solvent(s); and at least 0.1% by weight, with respect to the total weight of the ink, of one or more nutritional or ingestible dye(s) and/or pigment(s). Dispersion of particles of at least one pigment in at least one polar solvent comprises at least one zein as dispersing agent to facilitate the dispersing of particles and stabilize the dispersion. A process for marking a substrate, in particular a foodstuff, by ink jet printing with the foregoing composition and substrate, for example eggshell, provided with such a marking.

Abstract: Disclosed are solid pigment preparations containing (A) 60 to 95 per weight of at least one pigment, (B) 5 to 40 percent by weight of at least one water-soluble anionic surface-active additive from the group of the homopolymers and copolymers of ethylenically unsaturated monocarboxylic acids and/or ethylenically unsaturated dicarboxylic acids which can additionally contain monopolymerized vinyl monomers having no acid function, the alkoxylation products of said homopolymers and copolymers, and the salts of said homopolymers and copolymers and the alkoxylation products thereof, and (C) 0 to 20 percent by weight of at least one nonionic surface-active polyether-based additive as essential components. Also disclosed are a method for the production thereof and methods for dyeing macromolecular organic and inorganic materials.

Abstract: Colorant preparations contain the following ingredients: a) at least one dispersed, substantially water insoluble dye, b) water, c) at least one dispersant d) a compound of the general formula I where R1, R2 are independently selected from hydrogen, (CH2—CH2—O)nH or (CH(CH3)—CH2—O)n—H, where n is an integer from 1 to 8; (CH2—CH2—O)a—(CH(CH3)—CH2—O)b—(CH2—CH2—O)c—(CH(CH3)—CH2—O)d—H, where a, b, c, d are each an integer from 0 to 7 and a+b+c+d=9. R3 is selected from straight-chain C2-C10-alkyl, C6-C14 aryl, identicallly or differently substituted by hydrogen or C1-C8-alkyl CH2—O—R4 where R4 is selected from C1-C10-alkyl.

Abstract: Nutritional or ingestible ink composition for ink jet printing which is liquid at ambient temperature comprising: a) a binder comprising at least 0.5% by weight, with respect to the total weight of the ink, of at least one zein; b) a solvent comprising at least 10% by weight, with respect to the total weight of the ink, of one or more nutritional or ingestible solvent(s); c) at least 0.1% by weight, with respect to the total weight of the ink, of one or more nutritional or ingestible dye(s) and/or pigment(s). Dispersion of particles of at least one pigment in at least one polar solvent comprising at least one zein as dispersing agent. Use of at least one zein to facilitate the dispersing of particles of at least one pigment in at least one polar solvent and to stabilize the said dispersion. Process for marking a substrate, in particular a foodstuff, by ink jet printing with the said composition and substrate, for example eggshell, provided with such a marking.

Abstract: Aqueous carbon black dispersions contain carbon black and cationic and non-ionic surfactants in addition to water. The dispersions are produced by dispersing the carbon black and the other components in water with bead mills, ultrasonic mills or an Ultra Turrax mixer. The dispersions can be used to produce inks, lacquers and printing inks.

Abstract: Chroma is increased, color-to-color bleed is reduced, and edge acuity is increase for dye-based inks by an underprinting technique. A dye-based ink-jet ink printing system is provided, comprising cyan, yellow, and magenta inks, each ink contained in a separate ink pen. Each ink contains at least one water-soluble dye and vesicles. The vesicles are present in an amount sufficient to contain a substantial fraction of dye molecules within the water pool of the vesicles. The vesicles formed from a surfactant having a first polarity. The printing system further comprises an additional pen containing a fixer having a second polarity, opposite to the first polarity. Further, an ink-jet printer that includes the dye-based ink-jet ink printing system is configured to print the fixer on a print medium, followed by printing at least one ink on the fixer. A method for improving chroma, color-to-color bleed, and edge acuity in a dye-based ink-jet ink.