Abstract: A titanium dioxide slurry for ink jet ink, which comprises water and surface-treated titanium dioxide particles dispersed in the water, the surface treatment being a treatment with an inorganic phosphoric acid compound. Also disclosed is an ink comprising the titanium dioxide slurry.

Abstract: There is provided an ink composition which can realize good images, especially an ink composition which, when used in an ink jet recording method, can be stably ejected and can realize good image quality. The ink composition comprises: a colorant; water; a water soluble organic solvent; and a mixture of saccharides, wherein the mixture of saccharides comprises a monosaccharide and/or a derivative thereof, a disaccharide and/or a derivative thereof, and a tri or higher polysaccharide and/or a derivative thereof.

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: Disclosed are an ink set for ink jet recording which can realize images having excellent lightfastness, and an ink jet recording method using the same. The ink set for ink jet recording comprises two or more inks, the order from highest to lowest of fading of the inks being in the order from highest to lowest of lightness of the inks.

Abstract: An ink jet recording method comprising the step of printing two solutions of a first solution and an ink composition is provided which, even in the case of printing on a recycled paper, can realize a good printed image, especially an image having no significant feathering and free from unevenness of printing and an image free from color bleeding. A first solution containing a polyvalent metal salt and/or a polyallylamine is used in combination with an ink composition containing an inorganic oxide colloid, and optionally an epoxy-containing compound. Specifically, the first solution is deposited onto a recording medium, and the ink composition is then deposited by ink jet printing to perform printing.

Abstract: An ink composition is provided which can realize good images on plain paper, and, especially when used in an ink jet recording method, can have excellent ejection stability, storage stability, color development, and fixation and is much less likely to cause color bleeding and uneven printing and thus can realize good image quality.

Abstract: Disclosed is a black ink composition containing a carbon black and a pigment represented by the following general formula (1): 1

Abstract: Disclosed is a photocurable ink composition for use in an ink jet recording method wherein an ink composition is brought into contact with a recording medium followed by a photocuring reaction to perform printing. The photocurable ink composition can offer good coating strength, chemical resistance, dispersion stability, and printing stability. This photocurable ink composition comprises at least a colorant, a urethane oligomer, a monomer having a tri- or higher functional reactive group, a photopolymerization initiator, and an aqueous solvent. After printing the photocurable ink composition, ultraviolet light is applied to cure the print. The colorant is preferably anatase titanium dioxide.

Abstract: An ink composition is disclosed which can realize an image possessing excellent rubbing/scratch resistance and color reproduction in color ink jet recording and has advantages as a superpenetrating ink composition. The ink composition comprises at least a specific colorant, water, a water-soluble dispersant, and a penetrant, wherein the penetrant is 0.1 to 5% by weight of an acetylene glycol compound and the water-soluble dispersant is a water-soluble styrene/(meth)acrylic acid resin in an amount of 0.1 to 1 part by weight on a solid basis based on the pigment. An ink set capable of forming an excellent color image in color ink jet recording is also disclosed which comprises an orange ink composition and/or a green ink composition in combination with a yellow ink composition, a magenta ink composition, and a cyan ink composition that have hitherto been used in the color ink jet recording.

Abstract: An ink composition for ink jet recording is provided which possesses excellent printing stability, ejection stability, and storage stability and can yield good images, especially images having excellent color reproduction. The ink composition for ink jet recording comprises at least a colorant, a penetrating agent, a water-soluble organic solvent, and water, the colorant comprising a pigment coated with a resin which is an anionic group-containing polymer, the content of the pigment being in the range of 35 to 90% by weight based on the colorant, the penetrating agent comprising an acetylene glycol surfactant and/or a polysiloxane surfactant, the water-soluble organic solvent comprising at least an alkyl ether derivative of a polyhydric alcohol, wherein the alkyl has 3 or more carbon atoms, and/or a 1,2-alkanediol.

Abstract: A nozzle surface (13) is sealed by a cap member (44) in a state in which an ink solution is accumulated in a sealed hollow portion (45). After the nozzle surface (13) is sealed, piezoelectric vibrators (35) are driven by applying thereto a high-frequency drive signal of a frequency higher than a drive frequency for ejecting the ink solution toward recording paper, thereby causing cavitation in the ink solution. The firmly adhering thickened ink and solidified ink occurring in nozzle openings (29) are broken or exfoliated by bubbles caused by this cavitation. Subsequently, the suction operation is performed to remove the thickened ink and the solidified ink from the nozzle portions.

Abstract: A photosensitive resin film 6 is pressed onto the surface 2 of nozzle plate 1, with one portion entering the inside of nozzle 4. Then, by ultraviolet radiation directed from the rear surface 3 of nozzle plate 1, the inside the nozzle portion hardened as to form a plug 6a, and at the same time the portion of photosensitive resin film directly above nozzle 4 is hardened by the ultraviolet radiation to form an extensive portion 6b, of a size at least that of nozzle diameter d, but no larger than 1.4 times that of nozzle diameter d. Finally, using the shape of extensive portion 6b, an ink-repellent eutectoid plating coating layer 8 is applied to the whole surface 2 of nozzle plate 1 with the exception of the edge of nozzle 4 covered by the extensive portion, forming on that surface 2 a water-repellent surface that does not cause deviation in the flight of ink droplets, while restricting the lining of the inside of nozzle 4 with the coating layer.

Abstract: The entire part of a rear surface 2 of a nozzle plate 1 excluding peripheral portions 6 of nozzle holes 4 is coated with a resist tape, and this nozzle plate 1 is immersed in an electrolytic solution in which ions of a metal and particles of a water-repellent resin are dispersed to provide a plating thereon, and the plated nozzle plate 1 in the electrolytic solution is then heated to a temperature that is higher than a melting point of the water-repellent resin, whereby an entire portion extending from a front surface 3 of the nozzle plate 1 and the nozzle holes 4 contiguous to the front surface to the rear surface 2 is provided with a eutectoid plating layer 10 to suppress deviation of the passage of ink droplets due to wetting by an ink or the like.

Abstract: An ink jet recording method involving printing, on a recording medium, using two liquids, a reaction solution and an ink composition, is provided which can realize good images. In the ink jet recording method involving printing of two liquids, a reaction solution is deposited onto a recording medium, followed by pressing the recording medium by means of a plurality of rolls and heating. Thereafter, an ink composition is coated onto the recording medium with the reaction solution deposited thereon to perform printing.

Abstract: An objective of the present invention is to provide ink which is best suited for inkjet printing of a printed substrate. The ink is a photo polymerizing type water-base ink including at least a colorant, a photo polymerization resin, a photo initiator, and a water-base solvent. The photo polymerization resin includes oligomer particles in an emulsion state and monomers which reside in the oligomer particles. The water-base ink contains, with content ratio in terms of the percentage weight, 5% of ethyleneglycol, and between 0.1% to 10% of 2-pyrodoline and N-acrylonitrile morpholine combined.

Abstract: There is provided an ink composition which can realize good images, especially an ink composition which, when used in an ink jet recording method, can be stably ejected and can realize good image quality. The ink composition comprises: a colorant; water; a water soluble organic solvent; and a mixture of saccharides, wherein the mixture of saccharides comprises a monosaccharide and/or a derivative thereof, a disaccharide and/or a derivative thereof, and a tri or higher polysaccharide and/or a derivative thereof.

Abstract: An ink jet recording method capable of providing an image having a good quality is disclosed. In the ink jet recording method, a reaction solution and an ink composition are used to conduct printing on a recording medium. The reaction solution comprises a polyvalent metal salt, and an ink composition comprises a pigment and a resin emulsion.

Abstract: A yellow ink composition for ink jet recording is provided which possesses excellent lightfastness and in addition can retain excellent color development for a long period of time. The yellow ink composition comprises both C.I. Pigment Yellow 74 and at least one second yellow pigment selected from the group consisting of C.I. Pigment Yellow 109, 110, 128, 150, and 154.

Abstract: An ink composition is provided which can realize printing with excellent fixation even on a coated paper having a smooth surface. Further, an ink composition is also provided which, when used in ink jet printing, causes neither clogging nor creation of a precipitate. A copolymer of butyl acrylate, methyl methacrylate, and acrylic acid is added to an ink composition.

Abstract: A pigment-based ink composition for ink jet recording is provided which can offer prints having excellent scratch resistance and free from uneven printing. Ink jet recording is carried out using an ink composition comprising a pigment and an inorganic oxide colloid in combination. Further, the use of a recording head equipped with a nozzle plate (101), which has been treated to form a fluoropolymer-containing plating layer (104) thereon for rendering the nozzle plate (101) water-repellent, can realize printing free from the ejection of ink droplets with trajectories non-perpendicular to the print head.