Abstract: Iron azo complex compounds of the formula (I) are used as charge control agents in electrophotographic toners and developers, in powder coating materials, electret materials and in electrostatic separation processes, in inkjet inks and in color filters.

Abstract: Disclosed herein is an ink-jet recording method comprising applying a plurality of inks to a recording medium by an ink-jet system to form dual- or multi-toned image on the recording medium, wherein each of the inks permits formation of such an image on a transparent recording medium whose a* and b* values of CIELAB determined by measuring the CIELAB color space of the image on a transparent recording medium with a single pass satisfy the relationship represented by the following formula (I); (a*2+b*2)½≦15  (I).

Abstract: Compounds of the general formula (I) wherein R1 represents hydrogen or a C1-C4-alkyl group, X represents the radical of aliphatic, cyclic or aromatic diamines and Y represents hydrogen or an alkali metal, and a process for their preparation and their use for dyeing organic substrates, and organic substrates dyed with these compounds.

Abstract: Metallized bisazo dyes of general formula (IX) or of general formula (X) wherein A, R1, R2, R3, M and Met are defined in the specification are excellent dyes for dying and printing cellulose containing materials and especially for the preparation of inks for ink jet printing.

Abstract: Disclosed are metal complexes of trisazo dyes of the general formula 4 1

Abstract: Provided are novel black azo dyes which are useful in ink compositions, especially ink jet ink compositions. The dyes and ink compositions of the present invention exhibit a good balance of optical density, print reliability, water fastness and light fastness.

Abstract: Disclosed is a black ink composition for ink jet recording, comprising at least carbon black, a black dye, a water-soluble organic solvent, and water, the black dye being a black dye represented by formula (I), C.I. Direct Black 154, or C.I. Direct Black 168: wherein M represents a cation of a group selected from the group consisting of a hydrogen atom, an alkali metal, ammonia, and an organic amine; m is 1 or 2; and n is 0 or 1.

Abstract: Disclosed are compositions useful in inks suitable for ink jet printing.

Abstract: A composition comprising: (i) a dye of Formula (1) or a salt thereof:  wherein n is 0 or 1; and (ii) at least one dye selected from a dye of the Formula (2), (3), (4), (5), (6), (7) and salts thereof as defined in the description. Also claimed are the above compositions further comprising a water-soluble yellow dye and optionally a water-soluble cyan dye; inks containing the compositions; an ink jet printing process using the inks; and a substrate printed with the inks.

Abstract: An aqueous ink composition contains a colorant and a humectant, and has a surface tension &ggr; of less than 50 mN/m when measured by a maximum bubble pressure method at 25° C., with a bubble frequency &ngr; of the aqueous ink composition being set at less than 1 Hz, and a surface tension &ggr; of more than 40 mN/m when measured by the maximum bubble pressure method at 25° C., with the bubble frequency &ngr; of the aqueous ink composition being set at more than 5 Hz. In addition, an ink-jet printing method for forming ink images on an image-receiving medium has the step of ejecting the above-mentioned aqueous ink composition in the form of droplets according to the recording signals at a recording frequency of 8 kHz or more.

Abstract: The invention relates to novel disazo dyes of the formula in which the substituents and indices have the meaning stated in the disclosure, that are suitable for dyeing and printing polymeric materials and for the preparation of recording liquids for ink jet recording apparatus.