Abstract: The present invention provides an ink set for inkjet recording which has excellent resistance to light and can prevent image blurring and image deformation due to cracks or the like, wherein the ink set includes: a first liquid including a water soluble organic solvent, water and a pigment dispersed therein, in which an average particle diameter of the pigment is from 5 nm to 50 nm and a monodispersity of the pigment is 1.5 or less; and a second liquid which includes a component that can reduce a pH of the first liquid to less than 7 when contacted with the first liquid and can transform the first liquid from a region in which the dispersion of the pigment particles is stable to a region in which the dispersion of the pigment particles is unstable. The invention also provides a method of image recording using the ink set for inkjet recording.

Abstract: A pigment dispersion containing a metal pigment, wherein the metal pigment contains plate-like particles, and in the case where the longitudinal diameter on the planar surface of the plate-like particle is X, the lateral diameter is Y, and the thickness is Z, the 50% average particle diameter R50 of a corresponding circle determined from the surface area in the X-Y plane of the plate-like particle is between 0.5 and 3 ?m, and the condition R50/Z>5 is satisfied.

Abstract: An additive comprising an acetylene glycol or ethylene oxide/propylene oxide adduct of acetylene glycol and a sulfur-containing surfactant is added to a dye and water to form an ink composition which exhibits good wetting, penetrating and dispersing properties due to a reduced dynamic surface tension and complies with the environmental problem.

Abstract: A non-aqueous ink with an extended cap-off time for writing, drawing, painting or marking, or a writing or marking fluid respectively, having organic solvents, binding agents, drying retarders, colorants and if necessary further additives. The ink contains a fatty acid or a fatty acid blend as a drying retarder.

Abstract: An ink composition is provided which has excellent storage stability, good defoaming properties, and improved resistance to bleeding on the print paper during image forming, while preventing nozzle clogging when used in a wet-type image forming apparatus. The ink composition according to an exemplary embodiment of the present invention includes a colorant, a solvent, and a plurality of additives. The plurality of additives are of the same type and have one or more hydrophilic groups and one or more hydrophobic groups. Each of the one or more hydrophobic groups of the plurality of additives have the same structure, each of the one or more hydrophilic groups of the plurality of additives have the same structure, or each of the one or more hydrophobic groups and each of the one or more hydrophilic groups of the plurality of additives have the same structure.

Abstract: A water-based ink for ink-jet recording enables the expression of sharp text and lines in high density black, and the formation of a high quality gradation image in which the graininess is reduced in a black image of medium to high lightness. The inks include a color ink (A) and a color ink (B) each of which independently has a lightness index L* according to the L* a* b* calorimetric system of about 60 or less. The color ink (A) and the color ink (B) satisfy the following expression (I): about 120°?|???| about ?240°??(I) wherein ? is the hue angle of the color ink (A) and ? is the hue angle of the color ink (B). The chroma C* of a hue obtained by the combination of the color ink (A) and the color ink (B) is about 30 or less.

Abstract: The present invention relates to a water dispersion for ink-jet printing, including a colorant, particles (A) (except for pigments) having a refractive index of 1.0 to 2.2, and a nonionic organic compound containing a saturated or unsaturated hydrocarbon group having 8 to 30 carbon atoms, and exhibiting a solubility of 1 g or less in 100 g of water as measured at 25° C., as well as a water based ink containing the water dispersion. There are provided a water-based ink for ink-jet printing which can exhibit a high optical density upon one-pass printing on plain papers and, therefore, is suitable for high-speed printing, as well as a water dispersion used in the water-based ink.

Abstract: Disclosed is an ink jet ink composition suitable for printing on substrates such as glass and metal. The ink jet ink composition comprises two or more organic solvents at least one of which is an alcohol, three or more binder resins comprising nitrocellulose, a thermoplastic polyurethane, and a polyvinylbutyral resin, two or more adhesion promoters, and a soluble colorant. Also disclosed is a method of printing images on such glass and metal substrates. The ink jet ink composition provides improved print quality and reduced need for cleaning the nozzle.

Abstract: The invention provides an ink which has a higher fixation of a recorded matter, is more excellent in stability and reliability of the ink, and allows a recorded matter of high image quality to be obtained stably, a recorded image, an inkjet recording method, and devices using such an ink. The invention provides an aqueous ink including micromicelles which are dispersed in a transparent single phase in water, characterized in that the micromicelles are comprised of a combination of two or more surfactants which exhibit an opaque or translucent dispersed state in water and a compound having an alkyl group and having only a hydroxyl group as a water-soluble group, and an inkjet recording method, devices and a recorded image, using the aqueous ink.

Abstract: An ink composition containing an aprotic polar solvent, a thermoplastic resin, a pigment, a cyclic amide, a surfactant, and water and is printable on a recording surface that is a plastic film. The ink composition is capable of forming a record, having high weather resistance properties such as adhesion, scratch resistance, and water resistance, on a recording surface that is a plastic film.

Abstract: A no-mess water-based ink including a composition including water, an organic solvent, a coloring agent dissolved in the organic solvent and an emulsifier for use in conjunction with a specially treated substrate containing a color developer.

Abstract: The present invention provides an ink set comprising at least two or more pigment inks different in color, wherein differences in average particle size between the inks different in color are 30 nm or less, the inks each have a sedimentation rate, as indicated by equation (I), of 15% or less, and differences in the sedimentation rate between the inks different in color are 4% or less: Sedimentation rate (%)=(S0?S1)/S0×100??(I) wherein S0 represents an “initial ink concentration”, which is an absorbance at a wavelength of ?max (or at 500 nm when ?max is not detected) at the time when UV spectral characteristics are measured for a 1000-fold diluted solution of the ink; and S1 represents an “ink concentration after sedimentation”, which is an absorbance at a wavelength of ?max (or at 500 nm when ?max is not detected) at the time when UV spectral characteristics are measured for a 1000-fold diluted solution of a supernatant obtained by centrifuging the ink at 16500 G at 1.60×107 g·sec.

Abstract: A highlightable mixture, such as an ink, including a colored pigment, an eradicable colorant, and a non-eradicable colorant; a kit including the highlightable mixture and an eradicator fluid; an colorant complex including a colorless or substantially colorless eradicable dye selected from the group consisting of diarylmethane derivatives, triarylmethane derivatives, and methine dyes, and a colored pigment; and methods of applying an eradicator to at least a portion of a marking made with a highlightable mixture, are described herein.

Abstract: An ink composition is prepared in such a manner that a difference between a dynamic surface tension (mN/m) measured by a maximum bubble pressure method at a temperature of 24 to 26° C. and a static surface tension (mN/m) is within a range from 0 to 7 (mN/m). The ink composition is stored in an ink tank of an ink head, and is supplied from the ink tank to an ink chamber having a discharge port, and a voltage is applied to partitions formed by a piezoelectric material to apply a pressure by the partitions to the ink composition stored in the ink chamber, whereby a liquid droplet of the ink composition is discharged from the discharge port and the liquid droplet is deposited on a recording material to record an image.

Abstract: Provided herein is an aqueous ink, which is excellent in both image density and fixing ability irrespective of the kind of a recording medium even when the volume of an ink droplet is small and has such excellent properties that white stripes are not caused even when high-speed recording is conducted. The aqueous ink comprises at least water, a water-soluble organic solvent, a water-insoluble coloring material, a surfactant and a poor medium for the water-insoluble coloring material and/or a salt. The dynamic surface tension of the aqueous ink at a lifetime of 50 milliseconds determined by a maximum bubble pressure method is higher than 47 mN/m, and the dynamic surface tension at a lifetime of 5,000 milliseconds determined by the maximum bubble pressure method is 38 mN/m or lower.

Abstract: The present invention provides a pigment ink formulation containing a wax emulsion is disclosed. The wax emulsion comprises a specific wax and surfactant combination. In particular, the wax comprises a linear polyethylene wax and the surfactant is an alkyl ether carboxylate. The wax emulsion can be made by any process for preparing emulsions used by those skilled in the art such as typical homogenization methods. Applicants have discovered that such a wax emulsion can not only improve the scratch resistance of pigmented ink, but also improve other handling problems such as scuff and smear.

Abstract: A carbon black aqueous dispersion which exhibits excellent dispersibility in an aqueous medium, a small amount of feathering, excellent rubbing resistance (quick-drying properties), excellent discharge stability, and the like, and is suitable as an ink for inkjet printers and the like, and a method of producing the same are disclosed.

Abstract: There is provided a transparent solid marker that has high bending strength and low writing resistance as stick-formed goods, is difficult to break or bend, generates few remnants while coating is carried out, and does not cause spreading of a writing surface even if it is coated on a surface which is written on by oily or aqueous writing implements. There is provided a transparent solid marker that is obtained by heating and mixing a composition including a gel forming material that includes an alkali metal salt or ammonium salt of an aliphatic carboxylic acid having 8 to 36 carbon atoms, a transparency agent, a subsidiary transparency agent, hydrogenated glucose syrup, a basic pigment, and oil, and cooling it.

Abstract: In an ink set having a plurality of inks, the ink set has at least a pigment ink and a dye ink. The pigment ink contains at least water, a surfactant, a self-dispersion pigment, and a poor medium for self-dispersion pigment and/or a salt; a dynamic surface tension of the pigment ink at a lifetime of 50 milliseconds is higher than 47 mN/m. The dye ink contains at least water, a surfactant and a dye. An ink set is provided which can obtain images having a high image density and a superior bleeding resistance without regard to the types of recording mediums.

Abstract: A drying agent particularly suited for facilitating the drying of inks and paints includes a cobalt drier that is more than six percent cobalt by weight, and no more than fourteen percent cobalt by weight. In particular, the cobalt drier is twelve percent cobalt by weight. The drying agent can also include a manganese drier, tung oil, a water-activated drier, a two-way drier, and a lithographic overprint varnish. All ingredients can be present in the mixture at a concentration of one part by weight. The drying agent can be used with a variety of printing stock substrates, and may be used at significantly higher concentrations than prior art drying agents.