Abstract: Provided is a method for maintaining an ink jet recording apparatus according to the invention in an ink jet recording apparatus which performs recording using a solvent-based ink composition which includes at least one type of organic solvent selected from a group consisting of an ester-based solvent, a hydrocarbon-based solvent, and an alcohol-based solvent, the method including wiping a nozzle forming member, in which nozzles of a head which discharges the solvent-based ink composition are formed, using an impregnation solution and a wiping member with liquid absorbency, in which the impregnation solution contains at least one type of organic solvent selected from a group consisting of a compound which is represented by General Formula (1) below, esters, and dibasic acid esters, R1—O—(R2—O)n—R3??(1) (in General Formula (1) described above, R1 represents a hydrogen atom, an aryl group, or an alkyl group with 1 to 6 carbon atoms, R2 represents an alkylene group with 2 to 4 carbon atoms, R3 represents an a

Abstract: A non-aqueous ink jet ink composition contains C.I. Pigment Orange 43 as a pigment and one or more kinds of compounds represented by the following general formula (1) as a solvent and the content of water contained in the ink composition is 0.1% by mass or more and 2% by mass or less, R1O—(R2O)m—R3??(1). In general formula (1), R1 and R3 each independently represent hydrogen or an alkyl group in which the number of carbon atoms is 1 or more and 4 or less. At least one of R1 and R3 is an alkyl group in which the number of carbon atoms is 1 or more and 4 or less. R2 represents an alkylene group having 2 or 3 carbon atoms. m represents an integer of 2 or 3.

Abstract: A nonaqueous ink jet ink composition according to the invention includes a solvent including at least one compound represented by the following formula (1), and a pigment including a pigment orange 43 (PO-43), in which a Na amount included in the ink is 5 ppm to 500 ppm. R1O—(R2O)m—R3??(1) (wherein, in formula (1), R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms. However, either R1 or R3 is an alkyl group having 1 to 5 carbon atoms. R2 represents an alkylene group having 2 or 3 carbon atoms. m represents an integer of 1 to 6.

Abstract: An ink composition includes a solvent containing at least one compound represented by the following general formula (1): R1O—(R2O)m—R3??(1) wherein R1 and R3 each independently represent a hydrogen or an alkyl group having from 1 to 4 carbon atoms, R2 represents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 or 3; and a pigment containing Pigment Orange-43 (PO-43) having a volume average particle size of 100 nm or more and 400 nm or less.

Abstract: An ink composition for ink jet recording, containing: a dye; organic solvents; and water, wherein a ratio (S1/S2) of a content (S1) of the first organic solvent and a content (S2) of the second organic solvent being 15.3 or more and 205 or less: and wherein the organic solvents including a first organic solvent satisfying a following property (A) and a second organic solvent not satisfying the property (A), and property (A): when a mixture with polyvinyl alcohol is produced, a cluster having a mass of 70% or more based on a total mass of the mixture is formed and when a load of 5.3 g/mm2 or more and 7.1 g/mm2 or less is applied to the cluster, a cluster having a mass of 90% or more based on a total mass of the cluster is formed.

Abstract: An inkjet recording ink is used for an inkjet recording device that includes a silicone rubber having a solubility parameter at 25° C. of 6 to 8 as a member with which an ink comes in contact, the inkjet recording ink including water, a disperse dye, and an anionic surfactant, the content X (mass %) of the disperse dye and the content Y (mass %) of the anionic surfactant in the inkjet recording ink satisfying the relationship “Y/X?0.7”.

Abstract: Disclosed is ink composition used in a recording apparatus provided with a pressure regulation valve which performs opening and closing operations to adjust a pressure in a recording head and is covered with an elastic member. The ink composition includes a slip agent and a lactone system medium. The slip agent is preferably at least one kind selected from a group consisting of a silicon system compound, a hydrocarbon system compound, a fluorine system compound, an amide system compound, and acrylic compound. In addition, the content of the slip agent is preferably not more than 1% by mass.

Abstract: A non-aqueous ink composition for ink jet recording includes a pigment, a compound represented by General formula 1 below, and a phthalocyanine derivative provided with a polar group not having an amine structure, as a pigment dispersant for dispersing the pigment. The pigment is carbon black. The composition further includes an alkylene glycol monoalkyl ether: (wherein R1 indicates an alkyl group of 1 to 4 carbon atoms, and R2 and R3 each independently indicate a methyl group or an ethyl group).

Abstract: The nonaqueous ink composition for ink jet printing contains a compound represented by General Formula (1) below, and a heterocyclic compound selected from lactones and lactams. (In Formula (1), R1 represents an alkyl group having 1 to 4 carbon atoms, and R2 and R3 represent a methyl group or an ethyl group.

Abstract: A non-aqueous cleaning liquid which is used for cleaning an ink flow path, through which a non-aqueous ink is circulated, in an ink jet recording apparatus including the ink flow path and with which a container composed of polyolefin is filled, includes a pigment and an organic solvent. In the non-aqueous cleaning liquid, a content of the pigment is 0.001% by mass to 0.5% by mass and an average particle size (d50) of the pigment is 10 nm to 500 nm.

Abstract: The nonaqueous ink composition for ink jet recording according to the invention includes a compound represented by the General Formula (1) below; and a compound represented by the General Formula (2A) or the General Formula (2B) below. In the General Formula (1), R1 represents an alkyl group having 1 to 4 carbon atoms, and R2 and R3 represent a methyl group or an ethyl group; in the General Formula (2A), R4A represents an alkyl group having 5 to 9 carbon atoms, and R5A represents a methyl group or an ethyl group; in the General Formula (2B), R4B represents an alkylene group having 2 to 5 carbon atoms, and R5B and R6B each independently represent alkyl groups having 1 to 4 carbon atoms.

Abstract: An ink composition for ink jet recording, comprising: a dye; organic solvents; and water, the organic solvents including a first organic solvent satisfying a following property (A) and a second organic solvent not satisfying the property (A), and a ratio (S1/S2) of a content (S1) of the first organic solvent and a content (S2) of the second organic solvent being 15.3 or more and 205 or less: (A) when a mixture with polyvinyl alcohol is produced, a cluster having a mass of 70% or more based on a total mass of the mixture is formed and when a load of 5.3 g/mm2 or more and 7.1 g/mm2 or less is applied to the cluster, a cluster having a mass of 90% or more based on a total mass of the cluster is formed.

Abstract: Disclosed is ink composition used in a recording apparatus provided with a pressure regulation valve which performs opening and closing operations to adjust a pressure in a recording head and is covered with an elastic member. The ink composition includes a slip agent and a lactone system medium. The slip agent is preferably at least one kind selected from a group consisting of a silicon system compound, a hydrocarbon system compound, a fluorine system compound, an amide system compound, and acrylic compound. In addition, the content of the slip agent is preferably not more than 1% by mass.