Abstract: In the present invention, an inkjet recording ink can be provided, which ink can record stably an image with good fastness and elegant-quality over a long period in any conditions. The ink includes a high-molecular dispersant, a water-insoluble colorant, water-soluble organic solvent and water, in which the high-molecular dispersant is a block copolymer including at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively; and the water-insoluble colorant is a specific pigment. Further the present invention can provide a inkjet recording method, an inkjet cartridge, and an inkjet recording system.

Abstract: Disclosed herein is an ink including a coloring material, a resin and a solvent, wherein the resin is a block copolymer of a polyvinyl ether structure having a hydrophilic segment and a hydrophobic segment, and the hydrophilic segment of the block copolymer has a number average molecular weight of 1,000 to 50,000 and an HLB value of 4 to 18.

Abstract: An inkjet recording ink is composed of an encapsulated water-insoluble colorant encapsulated with a high-molecular dispersant, a water-soluble organic solvent, and water. The water-insoluble colorant is at least one colorant selected from the group consisting of C.I. Solvent Yellow 21, 42, 79, 82, 83:1, 88 and 151, at least one colorant selected from the group consisting of C.I. Solvent Red 8, 49, 83:1, 91, 127 and 218, at least one colorant selected from the group consisting of C.I. Solvent Black 3, 27, 29 and 45, or at least one colorant selected from the group consisting of C.I. Solvent Blue 25, 38, 44, 67 and 70. The high-molecular dispersant is a block copolymer comprising at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively. The inkjet recording ink can stably record images of high fastness and excellent quality over a long period even under severe environmental conditions.

Abstract: A water-based inkjet printer ink contains at least a colorant and a resin. The resin is a block copolymer, which contains at least one hydrophilic block and at least one hydrophobic block. Each of the blocks is a vinyl ether polymer, wherein said block copolymer is obtained by polymerizing vinyl ethers as monomer by using at least one aluminum compound selected from the group consisting of tripropylaluminum, triisopropylaluminum and aluminum compounds as Ziegler-Natta catalysts.

Abstract: In the present invention, an inkjet recording ink can be provided, which ink can record stably an image with good fastness and elegant-quality over a long period in any conditions. The ink comprises a high-molecular dispersant, a water-insoluble colorant, water-soluble organic solvent and water, in which the high-molecular dispersant is a block copolymer comprising at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively; and the water-insoluble colorant is a specific pigment. Further the present invention can provide a inkjet recording method, an inkjet cartridge, and an inkjet recording system.

Abstract: A water-based ink for inkjet printers contains at least a water-insoluble colorant, a block copolymer of a polyvinyl ether structure comprising at least one kind of hydrophilic segments and at least one kind of hydrophobic segments, water and an alkali. Each of the hydrophilic segments contains acidic groups. A content of the alkali is such that, when an infrared absorption intensity ascribable to ionic groups to be formed upon addition of an excess amount of the alkali to the block copolymer is supposed to be 100%, an infrared absorption intensity ascribable to ionic groups formed by dissociation of the acidic groups contained in the block copolymer becomes at least 80%, with a proviso that the content does not exceed twice as much as a smallest amount of the alkali that an infrared absorption intensity ascribable to ionic groups to be formed from the block copolymer becomes 100%.

Abstract: An inkjet recording ink is composed of a high-molecular dispersant, a water-insoluble colorant, a water-soluble organic solvent, and water. The water-insoluble colorant is at least one colorant selected from the group consisting of C.I. Solvent Yellow 21, 42, 79, 82, 83:1, 88 and 151, at least one colorant selected from the group consisting of C.I. Solvent Red 8, 49, 83:1, 91, 127 and 218, at least one colorant selected from the group consisting of C.I. Solvent Black 3, 27, 29 and 45, or at least one colorant selected from the group consisting of C.I. Solvent Blue 25, 38, 44, 67 and 70. The high-molecular dispersant is a block copolymer comprising at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively. The inkjet recording ink can stably record images of high fastness and excellent quality over a long period even under severe environmental conditions.

Abstract: A water-based inkjet printer ink contains at least a colorant and a resin. The resin is a block copolymer, which contains at least one hydrophilic block and at least one hydrophobic block. Each of the blocks is a vinyl ether polymer. The ink further contains aluminum or an aluminum compound.

Abstract: Disclosed herein is an ink comprising a coloring material, a resin and a solvent, wherein the resin is a block copolymer of a polyvinyl ether structure having a hydrophilic segment and a hydrophobic segment, and the hydrophilic segment of the block copolymer has a number average molecular weight of 1,000 to 50,000 and an HLB value of 4 to 18.

Abstract: A recording medium is composed of a base material and an ink-receiving layer arranged on a surface of the base material.