Abstract: An aqueous ink comprising at least a colorant, a water-soluble organic solvent and a compound represented by general formula (I) shown below, wherein said water-soluble organic solvent stays liquid at a temperature of not higher than 40° C., exhibits a water solubility of not lower than 1% by weight at a temperature of 20° C. and a saturated vapor pressure of not higher than 1.7 Pa at a temperature of 20° C.

Abstract: Disclosed are a cyan ink containing a copper phthalocyanine dye which can realize images much less susceptible to deterioration upon exposure to visible light, a yellow or magenta ink, to be used with a cyan ink containing a copper phthalocyanine dye, capable of realizing color images much less susceptible to deterioration upon exposure to visible light, and an ink set comprising at least a cyan ink, a yellow ink, and a magenta ink and capable of realizing color images much less susceptible to deterioration upon exposure to visible light. The copper phthalocyanine dye undergoes color change and fading upon exposure to visible light. This is considered attributable to deterioration and decomposition of the dye by photo-oxidation or photo-reduction.

Abstract: A recording ink includes at least a water-soluble azopyridone dye of the following formula (1) and a water-soluble organic solvent: 1

Abstract: A recording liquid for ink jet containing a solid fine particle dispersion obtained by dispersing in a medium a compound represented by the following general formula (I) or (II), and an ink jet recording method of recording using the recording liquid for ink jet containing the solid fine particle dispersion obtained by dispersing in a medium a compound represented by the following general formula (I) or (II): 1

Abstract: The present invention is directed to using cryoprotectants to improve freeze-thaw stability in an ink-jet ink composition.

Abstract: The present invention relates to a family of new porphine compounds for use as colorants and/or colorant stabilizers. The new porphine compounds may be used alone as a magenta dye or may be used in combination with one or more colorants to provide light stability to colorants. The present invention further relates to inks containing the new porphine compounds and a method for making the new compounds. The present invention also relates to improved methods of making Cu-meso-tetra-(2-sulfanatophenyl)-porphine (designated o-CuTPPS4). The improved processes allow the production of o-CuTPPS4 at lower cost and higher yields compared to conventional methods of making o-CuTPPS4. The present invention further relates to the use of o-CuTPPS4 as a colorant stabilizer for a variety of colorants, especially magenta colorants.

Abstract: A dye and a recording material employing the dye are disclosed. The dye is represented by formula B═N—A In the formula, A represents a metal-free atomic group necessary to form a condensed ring having —NR1R2 as a substituent on the ring, except for one ring in which a carbon atom on the ring combines with the nitrogen atom in the formula. B represents a coupler component and combines with a nitrogen atom in the formula at coupling position of the coupler component. R1 and R2 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, and a heterocycle which may have a substituent, and R1 and R2 may combine with each other to form a ring.

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: This consists in an ink composition containing: a coloring agent, 2-pyrrolidone, a specific surfactant, a butyl ether-based solvent, water, and a water-soluble organic solvent. With the present invention, it is possible to provide an ink composition with which clogging cannot occur, which is of excellent discharge stability, and which affords excellent printing quality by preventing blurring.

Abstract: An ink-jet ink which comprises a dye dispersed product, an oil-soluble dye being dissolved in a high boiling point organic solvent which has a boiling point of 150° C. or more and has a specific inductive capacity at 25° C. of 3 to 12, the oil-soluble dye is emulsified and dispersed in a water-based medium, and the dye dispersed product is formed. Further, a method of manufacturing an ink-jet ink, in which an oil-soluble dye is dissolved in a high boiling point organic solvent which has a boiling point of 150° C. or more and has a specific inductive capacity at 25° C. of 3 to 12, and the oil soluble dye is emulsified and dispersed at a pressure of 50 MPa or more using a high-pressure emulsifying and dispersing device.

Abstract: Phthalocyanine compounds of Formula (1) have utility as colorants in inks for ink-jet printing, where Formula (1) represents: which comprises any form of the compound: such as salt; stereoisomer, zwitterion, polymorph, complex, isotopic form, combinations thereof in the same species and mixtures thereof; where: M represents H, metal, halometal, oxymetal and/or hydroxymetal; k is the inverse of half of the valency of M; Pc represents a phthalocyanine nucleus of Formula (2): L represents a linking group comprising an optionally substituted C1-30carbyl; A represents —O—, —S— or —NR3—, where R3 independently comprises H or optionally substituted C1-30carbyl; R1 comprises at least one group independently selected from: an optional substituent and optionally substituted C1-15carbyl; R2 comprises optionally substituted C1-30carbyl that comprises at least one alkyl group substituted by at least one of: hydroxy, carboxy and sulpho; z repres

Abstract: The present invention relates to a family of new porphine compounds for use as colorants and/or colorant stabilizers. The new porphine compounds may be used alone or may be used in combination with one or more colorants to provide light stability to colorants. The present invention further relates to inks containing the new porphine compounds and a method for making the new compounds. The present invention also relates to improved methods of making porphines. The improved processes allow the production of porphines at lower cost and higher yields compared to conventional methods of making porphines.

Abstract: A dye which is represented by any of the following general formula (1), (2), (3) or (4), an ink for inkjet recording which contains at least one of the dyes, and an ink jet recording method which uses the ink. The dye has heterocyclic group which may be substituted and has at least one ionic aqueous group in a molecule.

Abstract: An ink composition suitable for printing machine readable indicia on a substrate with an ink jet printing device is disclosed. The disclosed ink composition comprises water, a water soluble resin, a red fluorescent colorant material mixture comprising C.I. Basic yellow 40 dye, C.I. Basic Red 1 dye, and C.I. Basic Violet 11:1 dye, and a blue colorant material comprising C.I. Acid Blue 9. In the preferred embodiments of the ink composition, the dyes in the red fluorescent colorant material mixture are present in a weight ratio of approximately 1.12 to 1.36 to 1, respectively, and the weight ratio of the red fluorescent colorant material mixture to the blue colorant material is in the range of about 3.8 to 1 to about 46 to 1.

Abstract: Disclosed is an ink composition which comprises water, an acid dye, a monovalent salt, a polyquaternary amine compound, and an optional nonionic or cationic surfactant, said ink being substantially free of organic solvents. The ink is particularly suitable for applications such as ink jet printing and marking pens. The disclosed inks in some embodiments are substantially indelible. Also disclosed is a composition for removing the ink compositions from substrates to which they have been applied which comprises water and a dianionic surfactant, optionally further containing a salt, urea, and/or a viscosity building agent such as a gum.

Abstract: Ink compositions containing ultraviolet absorbing compounds of formula I wherein R1, R2 and R3 are defined herein, and wherein the compound contains one or two —SO3M groups, one —SO3M and one —CO2M group, or two —CO2M groups. Ink jet ink compositions containing ultraviolet absorbing compounds of formula IV wherein R2, R3, R4, R5 and R6 are defined herein, and wherein the compound contains one or two —SO3M groups, one —SO3M and one —CO2M group or two —CO2M groups, with the provision that either (1) R2 and R3 are not both hydrogen, or (2) R5 is not hydrogen. The ink compositions are adapted for ink jet printing.

Abstract: Water-fastness in aqueous ink-jet inks containing water-soluble dyes is achieved by using a specific ionic species having a charge opposite to that on the dye molecule. Anionic dyes typically contain sulfonate (or carboxylate) anionic groups. Using at least one specific ionic species of opposite charge, specifically, phosphonium salts, causes the colorant components to “crash” or precipitate out of the water-based ink onto the print medium due to the formation of a suitable charge complex between the ionic parts of the dye and the opposite charge of the counter-ion species. Other positively charged salts, such as quaternary ammonium salts, carbonium salts, iodonium salts, sulfonium salts, and pyrillium salts may be used to improve aqueous dispersion stability and thus printability. Such additional cationic salt partially replaces the phosphonium salt(s).

Abstract: 1. An ink comprising water, a water-dissipatable polymer and a dye, wherein the dye carries a group of the Formula (1): wherein: R1 is optionally substituted branched chain alkyl; and R2 is H, optionally substituted alkyl or optionally substituted aryl. The inks are useful in ink jet printers.

Abstract: Suitable phthalocyanine compounds of Formula (1) have utility as colorants in inks for ink-jet printing, where Formula (1) represents: which comprises any form of the compound: such as salt; stereoisomer, zwitterion, polymorph, complex, isotopic form, combinations thereof in the same species and mixtures thereof; where: M represents a metal or H; Pc represents a phthalocyanine nucleus of Formula (2): L represents a linking group comprising an optionally substituted C1-30hydrocarbyl; A represents a group comprising at least one of: amino and optionally substituted C1-30hydrocarbyl comprising at least one protonable nitrogen atom; but where A comprises other than an alkyl group substituted by at least one of: hydroxy, carboxy and sulpho; R1 represents a group independently comprising at least one of: an optional substituent and optionally substituted C1-5hydrocarbyl; z represents an integer from 0 to 4; w represents an integer from 1 to 5; and the sum of w+z is from

Abstract: A method of forming a printing ink, the method including combining a nitrogen-containing cyclic organic compound, a glycol ether or a glycol ether acetate, and a colorant; and homogeneously blending the nitrogen-containing cyclic organic compound, the glycol ether or the glycol ether acetate, and the colorant to form the ink jet printing ink.

Abstract: Disclosed is an ink composition which comprises (a) water, (b) a colorant; and (c) an additive selected from the group consisting of diamido quaternary dialkyl ammonium salts, bitail quaternary tetraalkyl ammonium salts, bitail imidazolium salts, bitail biomimetic phospholipid salts, specific bisquaternary salts, &bgr;-hydroxyethyl ethylene diamine fatty acids, specific polyammonium salts, ethoxylated polyamine compounds, biquaternary pyridinium salts, aminofunctional polyorganosiloxanes, and mixtures thereof.

Abstract: Phthalocyanine compounds of Formula (1) have utility as colorants in inks for ink-jet printing, where Formula (1) represents: which includes all IJP-effective forms of such compounds; and in which: M represents a metal or H; A represents C1 4alkylene; Pc represents a phthalocyanine nucleus of Formula (2): D represents NR4R5 or SC1-4alkyleneSO3H; R1, R2 and R3each independently represents H or C1-4-alkyl; R4 represents H,; or C1-4-alkyl optionally substituted by hydroxy; R5 represents C1-4alkyl optionally substituted by hydroxy and/or morpholino; or R4 and R5 together with the N atom to which they are attached form a morpholino ring; and x+y+z represents an average of from 3 to 4.

Abstract: An ink jet printer is disclosed, which jets a water-soluble ink from a recording head comprising at least an ink passage-forming member and an orifice through the orifice to form flying droplets which form a dot image on a recording medium, wherein at least a portion of the ink passage-forming member is composed of borosilicate glass and the water-soluble ink comprises at least one of urea and thiourea. Further, an ink for use in the ink jet printer is also disclosed.

Abstract: The present invention is directed to compositions containing a colorant and at least one porphine. The present invention includes an ink set of one or more inks which have substantially identical light fastness properties. One or more of the inks of the ink set includes a colorant and at least one porphine. The porphine imparts light-stability to the colorant so that the colorant does not fade when exposed to electromagnetic radiation such as sunlight or artificial light. The ink set provides a range of colored inks having similar light-stability.