Abstract: An ink for use in ink jet recording which contains a dye and a pigment as colorants.

Abstract: An ink system comprising a first aqueous ink comprising a cationic pigment dispersion comprising a cationic dye and a pigment, and a second aqueous ink comprising an anionic dispersion comprising an anionic dispersant. The ink system reduces bleed between the two inks when they are applied side by side. The anionic dispersion in the second aqueous ink flocculates the cationic pigment dispersion in the first aqueous ink.

Abstract: The invention relates to aqueous colorant preparations containing A) between 0.1 and 50 wt. % of at least one organic and/or inorganic pigment and/or at least one organic colorant. B) between 0.01 and 80 wt. % of at least one naphthol-oxyalkylate sulfopropyl ether, one alkanol-oxyalkylate sulfopropyl ether or one alkylphenol-oxyalkylate sulfopropyl ether. C) between 0 and 30 wt. % of at least one organic solvent. D) between 0 and 20 wt. % of other standard derivatives and E) between 10 and 90 wt % of water, respectively in relation to the total weight (100%) of the colorant preparation. The colorant preparation is used, for example, in printing inks, especially ink jet printing inks.

Abstract: Water-based chemical indicator inks for ethylene oxide sterilization processes and methods for its use. The chemical indicator ink contains at least one pH indicator dye selected from the group consisting of Bromocresol green, Bromophenol blue, Methyl red, Ethyl orange, and combinations thereof. The pH indicator dye undergoes an irreversible color change when exposed to ethylene oxide vapor in the presence of low-temperature steam, but when exposed to other sterilization processes either does not undergo a color change or undergoes a color change that is different than is obtained when exposed to ethylene oxide.

Abstract: Disclosed herein is an ink comprising a pigment and a resin encapsulating a coloring material. The ink can provide an image high in optical density and excellent in rub-off resistance, water fastness and resistance to line marker, and exhibits excellent ejection stability from a recording head when used in ink-jet recording.

Abstract: Provided is an oil based ink for a ball-point pen comprising at least an alcohol-soluble dye, carbon black, a resin and an organic solvent, wherein the carbon black described above has a DBP oil absorption of 80 cc/100 g or less. The carbon black has preferably a particle diameter of 30 m&mgr; or less and a content of 1 to 15 mass % based on the total amount of the ink.

Abstract: Novel benzophenone derivatives and methods of making and using the same are disclosed. The novel compounds can display highly active photoinitiation and photopolymerization properties.

Abstract: An ink composition comprising: a self-dispersing carbon black, a binder, a stabilizing dye comprising at least as many groups comprising CO2H or COSH as groups comprising SO3H, and an aqueous vehicle. The stabilizing dye can improve the reliability and performance of the ink composition. The addition of the stabilizing dye can reduce or prevent the formation of material that blocks the printhead vias and throats as a result of the presence of a binder in the ink. The ink composition can reduce the amount of maintenance needed to retain all of a printhead's nozzles through the life of the printhead.

Abstract: An ink system comprising a first aqueous ink comprising a cationic pigment dispersion comprising a cationic dye and a pigment, and a second aqueous ink comprising an anionic dispersion comprising an anionic dispersant. The ink system reduces bleed between the two inks when they are applied side by side. The anionic dispersion in the second aqueous ink flocculates the cationic pigment dispersion in the first aqueous ink.

Abstract: An ink composition for oil-based ballpoint pens is comprised of a solvent, a colorant and an anti-corrosive wetting agent. The solvent is a water containing water-in-oil-type organic solvent. The colorant is a combination of a dye and a pigment, wherein the pigment is dispersed in the ink with a nonionic surfactant. The anti-corrosive wetting agent is a phosphate based surfactant. An oil-based ballpoint pen using the above ink is also included.

Abstract: A dispersant comprising a polyester chain obtainable by polymerising a hydroxy carboxylic acid or lactone thereof such as E-caprolactone with a cyclic alkylene carbonate such as 5,5-dimethyltrimethylene carbonate. The dispersant may be in the form of a phosphate ester where the polyester chain is reacted with a phosphating agent such as polyphosphoric acid or the polyester chain may be attached to a polyamine or polyimine such as polyethyleneimine.

Abstract: Disclosed is an ink composition comprising a liquid ink vehicle, a colorant, and a cyclic siloxane monomer composition capable of undergoing a ring-opening polymerization process upon contact with an anionic base.

Abstract: The invention relates to a compound of the 1-aminoanthraquinone, anthanthrone, anthrapyrimidine, quinacridone, dioxazine, diketopyrrolopyrrole, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perinone, perylene, phthalocyanine, pyranthrone or thioindigo series, which compound has one or more sulfonate groups of formula (I) wherein R1 is methyl or ethyl, R2 is C6-C24alkyl, C6-C24alkenyl or C7-C24aralkyl, R3 and R4 are each independently of the other a chain consisting of 1, 2 or 3 members, each member independently of any other(s) being (CH2))2 O—, —(CH2)3O—,CH(CH3)CH2O—,—CH2CH(CH3)—O-or—CH2CH(CH2O—)O— and the chains being terminated by H, CH3, C2H5 ?or C(═O)CH3, m is a number from 0.3 to 1.0 and n is number from 0 to (1.0-m), the compound being suitable for use as a pigment dispersant and rheology improver.

Abstract: A polychromic ink composition depending on viewing angle comprises 0.5 to 40% by weight of cholesteric liquid crystal polymer particles whose maximum particle diameter is 1 to 200 &mgr;m, 1.0 to 30.0% by weight of binder resins, 0.05 to 20% by weight of pigments with a deep-colored coloring matter whose average particle diameter is 0.01 to 0.5 &mgr;m, 0.01 to 5.0% by weight of a shear-thinning property imparting agent, and water with respect to the total amount of the ink composition.

Abstract: Compositions containing a solvent and at least one compound of Formula (1) in which: R1 represents H, an optionally substituted C1-8carbyl derived group, or a group of Formula A: in which c is from 2 to 6; R3 represents H or optionally substituted C1-8carbyl derived group; R4 and R5 independently represent an optional substituent; R2 represents an optionally substituted C1-8carbyl derived group; X, Y and Z independently represent H or an optional substituent; M represents H or a cation; and m and n independently represent 0, 1 or 2, are useful as colorants for color filters for displays. Compounds of Formula (1) wherein at least one of R1, R2, X, Y or Z, represent SO3M or PO3M2 are also provided.

Abstract: An object of the present invention is to provide ink compositions possessing excellent lightfastness. The cyan ink composition according to the present invention comprises, as colorants, a cyan colorant selected from the group consisting of C.I. Pigment Blue 15:3, C.I. Pigment Blue 15:4, and a mixture of the cyan colorants, and a yellow colorant having a higher fading rate than the cyan colorant. The magenta ink composition according to the present invention comprises, as colorants, a magenta colorant selected from the group consisting of C.I. Pigment Red 122, C.I. Pigment Red 202, C.I. Pigment Red 209, and mixtures of the magenta colorants, and a yellow colorant having a higher fading rate than the magenta colorant.

Abstract: An ink jet ink composition including water, humectant and a metallized, phthalocyanine colorant, the metallized, phthalocyanine colorant having the formula: MPc(SO3X)a(SO2NRR′)b wherein: M represents a metal; Pc represents a phthalocyanine nucleus; each X independently represents hydrogen, alkali metal or an organic cation; a is from 0 to 3; b is from 1 to 4; each R independently represents a substituted or unsubstituted alkyl group having from 1 to about 15 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; and each R′ independently represents R or hydrogen; with the proviso that a+b is an average of from 2 to 4; and with the further proviso that at least about 50 wt. % of the metallized, phthalocyanine colorant is present in the composition as particles.

Abstract: The present invention describes a method of producing an image which is visually distinct from its reproductions. This method comprises the steps of formulating an ink composition comprising a liquid vehicle and at least one modified pigment having attached at least one organic group and applying this ink composition to a substrate. Methods of determining the authenticity of an image and of verifying the date of creation of an image is also described.

Abstract: There are provided a pigment-containing coloring material stably dispersible in a high concentration in various organic solvents, and a process for producing the same. The production process of the coloring material is characterized by comprising the steps of: providing a solution comprising (1) a soluble pigment precursor which is convertible into an insoluble pigment, (2) a solvent capable of dissolving the soluble pigment precursor therein, and (3) a stabilizing agent comprising an organic compound having a structure or a functional group capable of stabilizing the dispersibility of the insolubilized pigment in the solvent; and converting said soluble pigment precursor into an insoluble pigment to obtain the coloring material containing the insolubilized pigment dispersed stably in the solvent.

Abstract: An ink set which comprises a black ink containing an aqueous medium and a pigment dispersed in the aqueous medium by an action of an ionic group, and at least two color inks each containing a coloring material and an aqueous medium, wherein (i) respective images formed with the respective color inks have the same &Dgr;E or have the difference in &Dgr;E that is 10 or less in a CIELAB color space display system in a fading test under conditions that cause fading corresponding to pseudo-indoor sunlight fading through a window for 3 years or more, and (ii) at least one of the color inks contains at least one of a coloring material and an additive that destabilize dispersion stability of the pigment in the black ink. The ink set can provide a high quality multicolor image keeping color balance after long preservation and showing less bleeding between black and color regions.

Abstract: The object of the present invention is to provide a double-color ink which is capable of producing a double-color effect stably for a long period of time. The present invention relates to a double-color ink comprising (1) metal powder pigments, (2) water, (3) at least one water-soluble organic solvent selected from the group consisting of alcohols, glycols and glycol ethers having a branched hydrophobic group(s) and (4) at least one water-soluble dye selected from the group consisting of anthraquinone dyes, carbonium dyes and metal complex dyes; and a writing utensil using the same as an ink.

Abstract: An ink jet ink composition including water, humectant and a metallized, phthalocyanine colorant, the metallized, phthalocyanine colorant having the formula: MPc(SO3X)a(SO2NRR′)b wherein: M represents a metal; Pc represents a phthalocyanine nucleus; each X independently represents hydrogen, alkali metal or an organic cation; a is from 0 to 3; b is from 1 to 4; each R independently represents a substituted or unsubstituted alkyl group having from 1 to about 15 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; and each R′ independently represents R or hydrogen; with the proviso that a +b is an average of from 2 to 4; and with the further proviso that at least about 50 wt. % of the metallized, phthalocyanine colorant is present in the composition as particles.

Abstract: A pigment dispersant including 80-97% by weight, based on the weight of thepigment dispersant, of a first polymer comprising as copolymerized units 15-75% by weight, based on the first polymer weight, ethylenically unsaturated carboxylic acid-functional monomer, the polymer having a Mw from 4,000 to 16,000, and the polymer having a Tg greater than 70° C.; and 3-20% by weight, based on the weight of the pigment dispersant, of a poly(ethylene oxide/propylene oxide) block second polymer having an Mw from 3,000 to 20,000 and an HLB value of 16 to 32 is provided. And the invention relates to a method for dispersing a pigment in an aqueous medium using the pigment dispersant, an aqueous pigment dispersion including the pigment dispersant, and an aqueous ink including the pigment dispersion.

Abstract: An ink set of the present invention that can effectively inhibit ink from blotting by using a betaine compound, which comprises at least four kinds of inks including colorless ink, wherein at least one ink of the at least four kinds of inks contains a betaine compound.

Abstract: Water-based chemical indicator inks for ethylene oxide sterilization processes and methods for its use. The chemical indicator ink contains at least one pH indicator dye selected from the group consisting of Bromocresol green, Bromophenol blue, Methyl red, Ethyl orange, and combinations thereof. The pH indicator dye undergoes an irreversible color change when exposed to ethylene oxide vapor in the presence of low-temperature steam, but when exposed to other sterilization processes either does not undergo a color change or undergoes a color change that is different than is obtained when exposed to ethylene oxide.

Abstract: A hot melt ink composition containing a an alkylene distearate which improves the color strength of the ink and is formed as a reaction product of a C4-C8 diol and at least one acid selected from the group consisting of a C16-C18 monofunctional acid and a C9-C10 difunctional acid.

Abstract: A smooth stable viscous gelled printing ink composition comprising a mixture of water, a gelling agent, a chelating agent, and a colorant or pigment, property enhancing additives evenly dispersed into the mixture, and an alkaline electrolyte viscosity increasing agent that raises the pH of the mixture and forms a smooth homogeneous stable gel with a viscosity level having the consistency of a custard or jelly. In addition to the colorants or pigments, additives may also include drying oils, resins, surfactants, film forming components, water flight agents, and other additives. The stabilized gel prevents separation and settling of the homogeneously suspended colorants, pigments, and property enhancing additives, and significantly improves storage stability. The ink compositions do not require shaking, stirring, or mixing prior to use are fast drying on paper, and do not dry on the printing press, in the storage containers, or in the ink jet or bubble jet injector nozzles.

Abstract: The invention provides an ink composition having improved printing performance. The ink composition includes an ink vehicle, from about 0.1 to about 10% by weight self-dispersed ink pigment, from about 0.1 to about 10% by weight dye, a humectant, and a penetrant, wherein the weight ratio of ink pigment to dye ranges from greater than about 0.75:1 to less than about 2.5:1. Such ink compositions exhibit substantially improved permanence, decreased drying time, and high optical density compared to ink compositions containing only ink pigment or dye.

Abstract: Described is a process for preparing polymer-enrobed pigment particles, which comprises mixing in the presence of finely dispersed pigment particles a solution of a polymer in a first solvent with a second solvent in which the polymer is substantially insoluble. The pigment particle can be specifically modified by judicious selection of the polymer.

Abstract: An aqueous metallic ink composition comprising an aluminum powder pigment, a colorant, a polysaccharide, water, a water-soluble solvent and a material selected from a polyvinyl pyrrolidone, a polyethylene oxide or a compound thereof.

Abstract: High quality images showing an excellent fixation are formed by an ink-jet recording method using pigment inks. An ink set for the ink jet-recording method comprises a first ink containing an anionic dye in an aqueous medium, a second ink containing an anionic dye and having a lower coloring material content than the first ink and a dispersion destabilizing substance, and a third ink containing a self-dispersible first pigment, a second pigment and a polymeric dispersant for dispersing the second pigment in an aqueous medium. The dispersion destabilizing substance destabilizes the dispersion stability of at least either the first pigment or the second pigment in the third ink when the second ink and the third ink are brought into contact with each other. The second ink and the third ink are applied onto a printing medium one after another or substantially simultaneously so that they are brought into contact with each other in a liquid state on the printing medium.

Abstract: Provided are an ink jet recording ink (IJ ink), an ink jet recording ink set (IJ ink set) and a recording method, having excellent dispersion stability and ejection stability and being capable of providing images which is free from bleeding and which is excellent in color development property and rubbing resistance. An IJ ink and an IJ ink set having long-term storage stability are provided. Also provided are recorded matter having excellent color development property and rubbing resistance, and an ink jet recording apparatus capable of providing the same.

Abstract: The invention provides an ink set for ink jet recording which gives high color density with respect to plain paper and exclusive paper and satisfactory color reproducibility and which has excellent ejection stability and storage stability.

Abstract: A color ink jet ink set for color printing having a yellow ink of a carrier and a yellow azoaniline dye; a magenta ink of a carrier and a magenta anthrapyridone dye; and a cyan ink of a carrier and Direct Blue 307.

Abstract: Provided is an oil based ink for a ball-point pen comprising at least an alcohol-soluble dye, carbon black, a resin and an organic solvent, wherein the carbon black described above has a DBP oil absorption of 80 cc/100 g or less. The carbon black has preferably a particle diameter of 30 m&mgr; or less and a content of 1 to 15 mass % based on the total amount of the ink.

Abstract: A non-erasable liquid ink for a marking instrument including a colorant and a solvent and having a water content of about 0-15% by weight and a viscosity of about 15 to 4,500 cps. Also disclosed is a marking instrument filled with an ink of such a viscosity or lower in its reservoir.

Abstract: The invention provides an ink composition having improved printing performance. The ink composition includes an ink vehicle, from about 0.1 to about 10% by weight self-dispersed ink pigment, from about 0.1 to about 10% by weight dye, a humectant, and a penetrant, wherein the weight ratio of ink pigment to dye ranges from greater than about 0.75:1 to less than about 2.5:1. Such ink compositions exhibit substantially improved permanence, decreased drying time, and high optical density compared to ink compositions containing only ink pigment or dye.

Abstract: A marking ink composition contains a dye, a pigment, a dispersion medium X in which the dye is practically soluble, and a dispersion medium Y in which the dye is practically insoluble, the dispersion media X and Y being mutually immiscible. A display medium includes a marking ink composition, and two plates for holding the marking ink composition therebetween, at least one of the plates having a transparent portion. A method for printing an image on an image receiving material includes the steps of depositing the above-mentioned marking ink composition on the image receiving material, and removing the dispersion medium X and the dispersion medium Y from the image receiving material. There is also described an image printed on an image receiving material by the above-mentioned printing method.

Abstract: Aqueous based pigment dispersions wherein the pigment is dispersed in a dispersant dye in the absence of any other dispersant or additive and aqueous based printing ink compositions containing these a pigment dispersions. Methods for preparing aqueous based pigment dispersions, wherein the pigment is dispersed in a dispersant dye, and method for preparing printing ink compositions incorporating these dispersions.

Abstract: An object of the present invention is to provide ink compositions possessing excellent lightfastness. The cyan ink composition according to the present invention comprises, as colorants, a cyan colorant selected from the group consisting of C.I. Pigment Blue 15:3, C.I. Pigment Blue 15:4, and a mixture of the cyan colorants, and a yellow colorant having a higher fading rate than the cyan colorant. The magenta ink composition according to the present invention comprises, as colorants, a magenta colorant selected from the group consisting of C.I. Pigment Red 122, C.I. Pigment Red 202, C.I. Pigment Red 209, and mixtures of the magenta colorants, and a yellow colorant having a higher fading rate than the magenta colorant.

Abstract: The present invention describes a method of producing an image which is visually distinct from its reproductions. This method comprises the steps of formulating an ink composition comprising a liquid vehicle and at least one modified pigment having attached at least one organic group and applying this ink composition to a substrate. Methods of determining the authenticity of an image and of verifying the date of creation of an image is also described.

Abstract: Provided is an ink for writing instruments which contains an interference pigment as a colorant and is designed to change the color tone of a line drawn with the ink depending on the darkness of a writing surface. The ink for writing instruments therefore contains an interference pigment coated, on the surface of a flaky minute base material, with a metal oxide having a high refractive index.

Abstract: An ink of the present invention has a dye and a pigment. The pigment is a self-dispersant type pigment and an anionic dye in which at least one anionic group is bound on a surface of the pigment directly or through another atomic group and having a Ka value of less than 1 ml·m−2·msec−½ according to a Bristow method. An image having an excellent image quality is formed by using such an ink in the process of ink jet recording.

Abstract: Disclosed is a set of inks for printing multicolor images in an ink jet printer, said ink set comprising (1) a first ink having a first color and comprising water and an anionic dye; and (2) a second ink having a second color different from the first color and comprising (a) water, and (b) pigment particles having chemically bonded to the surfaces thereof moieties containing amine or quaternary amine functional groups, wherein the anionic dye in the first ink is capable of being immobilized on a printing substrate by interaction with the pigment particles in the second ink, thereby enabling reduced intercolor bleed.

Abstract: A method of preparing a scented ink composition comprising the steps of first preparing a mixture which includes a polymer component consisting of a water soluble polymer selected form the group consisting of acrylic, styrene-maleic anhydride, sulfonated polyester, polyamide, and polyurethene. A color component which is selected from the group consisting of a pigment and a dye, and a solvent component comprising water are also provided. The mixture is then agitated. An oil-based fragrance is then blended into this mixture to produce a scented mixture and is then agitated. A microemulsion of the oil-based fragrance in water is created, wherein the resin stabilizes the microdroplets of the oil-based fragrance by coating the microdroplets. Preferably, the microdroplets of the oil-based fragrance have a diameter of from about 0.1 to about 1.0 micrometers.

Abstract: A suspension of a pigment in a grease is used as a ballpoint penink.

Abstract: A multicolor ink jet printing process employs an ink jet ink composition comprising water, a colorant of pigment, dye, or mixtures thereof, and a low boiling point additive to produce high quality multicolor ink jet images with minimal intercolor bleed and lines with sharp edges as characterized by a relatively low mid frequency line edge noise (MFLEN) number. The additive is an alcohol or thiol having a boiling point less than or equal to about 115° C. The aforementioned ink jet ink composition can further include an optional additive of alcohol or thiol with a boiling point less than or equal to about 135° C. if necessary. The desired additive increases the ink's drying rate with fast evaporation and an accelerated penetration into a print substrate (e.g. paper) upon printing. As a result, little or minimum residual ink (e.g. carbon black ink) comprising the aforementioned additive is available on the surface of the print substrate to intermix with a previously or subsequently printed ink (e.g.

Abstract: A decorative dye colorant for use on various types of natural stone, such as granite, marble, limestone, and soapstone. The colorant is formed by mixing a solvent soluble dye with a suitable solvent, such as a ketone or an alcohol to form a dye solution. The solvent enables the dye to penetrate easily into the pores or openings located in the surface of the stone to color the stone so as not to mar the appearance of the surface of the stone. The dye is resistant to removal or discoloration, but may be removed by extended contact of certain chemicals with the dye. To permanently prevent the removal of the dye, a sealer is applied over the dye to prevent any such materials from contacting the dye. The sealer is comprised of an aliphatic urethane mixed with the alcohol xylol that also includes ultraviolet light resistant properties to prevent the dye from fading over time.

Abstract: The present invention is directed to aqueous based ink compositions for ink jet printing on offset media and offset ink comprising combinations of dye-based and pigment-based colorants, and optionally surfactants. Optionally solvents and binders can be also added. In another formulation, an effective amount of the combination of ink colorants, at least one surfactant, being present at from about 0.1% to 1.5% by weight and an effective amount of at least one binder (such as an acrylate binder) is disclosed.

Abstract: The present invention relates to black alcohol soluble dye formulations of high color intensity, low viscosity, and high tinctorial strength. The formulations are particularly useful for writing instruments such as felt tip and roller ball pens.