Embodiments of the present invention relate to a conductive composition, an ink or coating, and an article. The conductive composition comprises graphene sheets, graphite, and carbon black. A conductive ink or coating comprising graphene sheets, graphite, and carbon black.

An aqueous ink for ink jet, the aqueous ink including a pigment and a resin for dispersing the pigment. The pigment is impregnated with a compound having a structure in which at least two structures each represented by General Formula (1) are bonded by a glycoside bond. ##STR00001##

An aqueous ink for ink jet, the aqueous ink including a pigment and a resin for dispersing the pigment. The pigment is impregnated with a compound having a structure in which at least two structures each represented by General Formula (1) are bonded by a glycoside bond. ##STR00001##

An aqueous ink containing a self-dispersible pigment for use in an ink jet recording method using a recording head that ejects an ink by an action of thermal energy. The aqueous ink contains a compound represented by General Formula (I): ##STR00001##
where in General Formula (I) R.sub.1's are independently of each other, a sulfonic acid group, a carboxylic acid group, a phosphoric acid group or a phosphonic acid group, R.sub.2 is a hydrogen atom or an alkyl group, and n is an integer of 1 to 5.

An aqueous ink containing a self-dispersible pigment for use in an ink jet recording method using a recording head that ejects an ink by an action of thermal energy. The aqueous ink contains a compound represented by General Formula (I): ##STR00001##
where in General Formula (I) R.sub.1's are independently of each other, a sulfonic acid group, a carboxylic acid group, a phosphoric acid group or a phosphonic acid group, R.sub.2 is a hydrogen atom or an alkyl group, and n is an integer of 1 to 5.

An ink jet recording method has an ejection step of ejecting, onto a substrate, an ink composition A that includes water, a coloring agent, a photopolymerization initiator, and a microcapsule enclosing a polymerizable compound therein, and an ink composition B that includes water, a coloring agent, a photopolymerization initiator, and a microcapsule enclosing a polymerizable compound therein; and an irradiation step of irradiating, with light, the ink composition A and the ink composition B ejected on the substrate. An absorbance ABS.sub.A of the ink composition A and an absorbance ABS.sub.B of the ink composition B satisfy a formula (1), and a concentration M.sub.A of the microcapsule included in the ink composition A and a concentration M.sub.B of the microcapsule included in the ink composition B satisfy a formula (2).

ABS.sub.A<ABS.sub.B Formula (1)

M.sub.A<M.sub.B Formula (2)

An ink jet recording method has an ejection step of ejecting, onto a substrate, an ink composition A that includes water, a coloring agent, a photopolymerization initiator, and a microcapsule enclosing a polymerizable compound therein, and an ink composition B that includes water, a coloring agent, a photopolymerization initiator, and a microcapsule enclosing a polymerizable compound therein; and an irradiation step of irradiating, with light, the ink composition A and the ink composition B ejected on the substrate. An absorbance ABS.sub.A of the ink composition A and an absorbance ABS.sub.B of the ink composition B satisfy a formula (1), and a concentration M.sub.A of the microcapsule included in the ink composition A and a concentration M.sub.B of the microcapsule included in the ink composition B satisfy a formula (2).

ABS.sub.A<ABS.sub.B Formula (1)

M.sub.A<M.sub.B Formula (2)

An ink jet recording method by using an ink jet recording apparatus equipped with a line head, wherein the line head includes a plurality of recording element substrates each having a nozzle array comprised of a plurality of nozzles, which eject an aqueous ink, arranged in a predetermined direction, the recording element substrates are arranged in the predetermined direction such that the recording element substrate constitutes an overlapping portion at which the terminal portion of the recording element substrates is overlapped with the terminal portion of adjacent recording element substrate in the predetermined direction, and the average temperature To ( C.) of an ink ejected from overlapping-portion nozzles included in the overlapping portion of the nozzle array and the average temperature Tc ( C.) of an ink ejected from the center-portion nozzle included in the center portion of the nozzle array satisfy the relationship Tc>To.

An ink jet recording method by using an ink jet recording apparatus equipped with a line head, wherein the line head includes a plurality of recording element substrates each having a nozzle array comprised of a plurality of nozzles, which eject an aqueous ink, arranged in a predetermined direction, the recording element substrates are arranged in the predetermined direction such that the recording element substrate constitutes an overlapping portion at which the terminal portion of the recording element substrates is overlapped with the terminal portion of adjacent recording element substrate in the predetermined direction, and the average temperature To ( C.) of an ink ejected from overlapping-portion nozzles included in the overlapping portion of the nozzle array and the average temperature Tc ( C.) of an ink ejected from the center-portion nozzle included in the center portion of the nozzle array satisfy the relationship Tc>To.

A method for manufacturing an aqueous black pigment dispersion, including the steps of subjecting a mixture containing carbon black and an aqueous medium to media-less dispersion and adding a resin having anionic groups and a basic compound after the dispersion, wherein the carbon black has a carboxylic acid group on the surface such that the value produced by dividing the amount of carboxylic acid group present on the surface by BET value is 0.8 to 5.5 (mol/m.sup.2) and the resin having anionic groups is an urethane resin that satisfies (weight average molecular weight/acid value)<1,400 or a styrene acrylic resin that satisfies (weight average molecular weight/acid value)<120.