Abstract: The present invention provides an ink composition for ink jet recording, including an azo dye, a humectant, water, and an amino-group-containing water-soluble compound that undergoes condensation polymerization in the absence of the water (e.g., an aminosilane compound), wherein a straight-chain or branched alkyl group whose carbon number is two or more, an alkoxyl group, a phenyl group or a derivative group thereof, a phenoxyl group, or a six-membered or larger cycloalkyl group is introduced to a carbon atom at an ?-position of the amino group in the amino-group-containing water-soluble compound that undergoes condensation polymerization in the absence of water.

Abstract: In an ink for ink jet recording use including a water-soluble dye, a humectant, a penetrant, water and a hydrolyzable organic silicon compound, silicon atoms (62) are contained in the ink at a ratio of 3.3 or more with respect to one hydrophilic group (52) in the water-soluble dye molecules (50) so that at least the whole hydrophilic groups (52) in the water-soluble dye molecules (50) are surrounded by silicon atoms (62) as a result of a condensation and polymerization reaction of said organic silicon compound.

Abstract: Changes of ink properties are prevented in an ink jet recording head, an ink cartridge, and a recording apparatus which include ink containing a dye having an anion group, a humectant, a penetrant, water, and a hydrolyzable silane compound having an amino group. Resin or rubber which contains a hydrogen ion releasing additive is used for a member of the apparatus with which ink for ink jet recording comes in contact. The content of the additive in the material is not less than 0.001% by mass and not more than 0.1% by mass. The additive includes at least an acid, a ketone, and a functional group of ester each of which exhibits acidic properties.

Abstract: An ultraviolet absorber having an acidic group is further added to an ink composition for inkjet recording which contains a colorant, a humectant, water, and a water-soluble substance that is condensation-polymerized in the absence of the water. A radical trapping agent having an acidic group is further added to an ink composition for inkjet recording which contains a colorant, a humectant, water, and a water-soluble substance that is condensation-polymerized in the absence of the water.

Abstract: An ink for inkjet recording containing a colorant, a humectant, a penetrant, water and a water soluble substance that is condensation-polymerized in the absence of water (e.g., hydrolysable silane compound), a gelation suppressant is contained for suppressing gelation of the water soluble substance in the water, wherein gelation suppressant is acetylacetone or derivative thereof.

Abstract: In an ink composition used for inkjet recording which contains a colorant, a humectant, water, and a water-soluble substance that begins to be condensation-polymerized as the water evaporates, a condensation-polymerization accelerating agent for accelerating the condensation-polymerization of the water-soluble substance is further contained.

Abstract: A coat liquid, in which a methoxysilane or ethoxysilane compound which is a precursor of silicon oxide and an ethoxysilane or methoxysilane compound which contains therein a carbon fluoride chain are dissolved, is applied onto the surface of a base material of SUS having a thickness of 20 ?m. This is followed by drying the base material for one hour at room temperature condition. Thereafter, the base material is baked at 200 degrees centigrade for 30 minutes thereby to form a water repellent thin film having a thickness of from 10 nm to 1000 nm and containing therein a molecule in which fluoroalkyl chains are bonded to the silicon oxide. A nozzle orifice is formed by electrical discharge machining from the lower side of the base material.

Abstract: An ink-jet recording ink contains at least a colorant, a moisturizer, water and a water-soluble substance capable of undergoing polycondensation along with vaporization of the water, in which the colorant is a chelate azo dye.

Abstract: The invention provides a method for preparing an ink having constituents of a water-soluble dye having a water-soluble solubilizing group of at least one of a sulfonic group and a carboxyl group, water, a water-soluble substance that is condensation-polymerized in the absence of the water, a water-soluble medium and an additive including at least one of an organic acid salt and an inorganic acid salt. This method includes a first mixing step of mixing at least the dye and the water-soluble substance out of the constituents of the ink excluding the additive; a second mixing step of mixing a mixture obtained in the first mixing step and the additive; and a pH adjusting step, performed before the second mixing step, of preparing a solution including the mixture or a solution including the additive while adjusting the solution to a given pH range by using a pH adjuster.

Abstract: A filler solution of the present invention, which is supplied to fill an ink-jet head, contains water and a hydrolyzate of a silicon compound which has a hydrophilic group.

Abstract: In an ink for ink jet recording use comprising a water-soluble dye, a humectant, a penetrant, water and a hydrolyzable organic silicon compound, silicon atoms (62) are contained in the ink at a ratio of 3.3 or more with respect to one hydrophilic group (52) in the water-soluble dye molecules (50) so that at least the whole hydrophilic groups (52) in the water-soluble dye molecules (50) are surrounded by silicon atoms (62) as a result of a condensation and polymerization reaction of said organic silicon compound.

Abstract: Changes of ink properties are prevented in an ink jet recording head, an ink cartridge, and a recording apparatus which include ink containing a dye having an anion group, a humectant, a penetrant, water, and a hydrolyzable silane compound having an amino group. Resin or rubber which contains a hydrogen ion releasing additive is used for a member of the apparatus with which ink for ink jet recording comes in contact. The content of the additive in the material is not less than 0.001% by mass and not more than 0.1% by mass. The additive includes at least an acid, a ketone, and a functional group of ester each of which exhibits acidic properties.

Abstract: Ink for ink-jet recording contains an oil soluble dye, a humectant, a penetrant, water, and an amphiphilic star block polymer of which the outer portion is hydrophilic. The surface tension of the ink at 25° C. is in the range of 20 to 50 mN/m.

Abstract: In ink containing a colorant, a humectant, a penetrant, water, and a water-soluble substance that is condensation-polymerized in the absence of the water (e.g., hydrolyzable silane compound), the surface tension of the ink at 25° C. before the water-soluble substance is condensation-polymerized is set to 20-50 mN/m, or the ink further contains a fluoroalkyl monoalcohol whose boiling point is lower than 100° C.

Abstract: In ink containing a colorant, a humectant, a penetrant, water, and a water-soluble substance that is condensation-polymerized in the absence of the water (e.g., hydrolyzable silane compound), a gelation suppressant is contained for suppressing gelation of the water-soluble substance in the water, or the pH value of the ink is set to 8-12.

Abstract: An ink composition containing a colorant, a humectant, water, and a water-soluble substance that is condensation-polymerized in the absence of the water, wherein the water-soluble substance has a hydrophobic group (fluoroalkyl group, alkyl group).

Abstract: An ink composition containing a colorant, a humectant, water, and a water-soluble substance that begins to be condensation-polymerized as the water evaporates is ejected such that drops of the ink composition are adhered onto a print material 41 whose surface is acidic, whereby an image is formed on the print material 41.

Abstract: In an ink composition used for inkjet recording which contains a colorant, a humectant, water, and a water-soluble substance that begins to be condensation-polymerized as the water evaporates, a condensation-polymerization accelerating agent for accelerating the condensation-polymerization of the water-soluble substance is further contained,

Abstract: A coat liquid, in which a methoxysilane or ethoxysilane compound which is a precursor of silicon oxide and an ethoxysilane or methoxysilane compound which contains therein a carbon fluoride chain are dissolved, is applied onto the surface of a base material of SUS having a thickness of 20 &mgr;m. This is followed by drying the base material for one hour at room temperature condition. Thereafter, the base material is baked at 200 degrees centigrade for 30 minutes thereby to form a water repellent thin film having a thickness of from 10 nm to 1000 nm and containing therein a molecule in which fluoroalkyl chains are bonded to the silicon oxide. A nozzle orifice is formed by electrical discharge machining from the lower side of the base material.

Abstract: A method of contacting s substrate having a surface containing hydroxyl groups with a non-aqueous solution containing a material having a chrolosilyl group; washing if desired; coating the substrate with a non-aqueous solvent containing a compound having a fluorocarbon group and a chlorosilane group or a solvent containing a compound containing a fluorocarbon group and an alkoxysilane; and baking the substrate if necessary in order to form a fluorocarbon-based polymer coating film chemically bonded to the substrate surface. The hydroxyl groups on the substrate surface and chlorosilyl groups are reacted to form a thin film having a large number of silanol groups (—SiOH) capable of connecting the polymer coating film to the substrate to form a heat-, weather-, and wear-resistant film on various surfaces.