An ink set including an aqueous inkjet ink composition and a primer composition. The aqueous inkjet ink composition contains a pigment, an alkali-soluble resin, a resin emulsion, a surfactant, a water-soluble solvent, and water; the resin emulsion contains a polyurethane resin emulsion and/or a polyolefin resin emulsion; the surfactant contains an alkyl sulfonate and/or a polyoxyethylene alkyl ether sulfate; the aqueous inkjet ink composition has a content of the alkyl sulfonate and/or the polyoxyethylene alkyl ether sulfate of 0.05% by mass or more and 0.5% by mass or less; and the primer composition contains an aggregation accelerator that accelerates aggregation of the aqueous inkjet ink composition. The ink set provides a printed matter having good print image quality and excellent abrasion resistance, and has good storage stability and ejection stability.

An ink set including an aqueous inkjet ink composition and a primer composition. The aqueous inkjet ink composition contains a pigment, an alkali-soluble resin, a resin emulsion, a surfactant, a water-soluble solvent, and water; the resin emulsion contains a polyurethane resin emulsion and/or a polyolefin resin emulsion; the surfactant contains an alkyl sulfonate and/or a polyoxyethylene alkyl ether sulfate; the aqueous inkjet ink composition has a content of the alkyl sulfonate and/or the polyoxyethylene alkyl ether sulfate of 0.05% by mass or more and 0.5% by mass or less; and the primer composition contains an aggregation accelerator that accelerates aggregation of the aqueous inkjet ink composition. The ink set provides a printed matter having good print image quality and excellent abrasion resistance, and has good storage stability and ejection stability.

A printing method includes: a processing fluid applying step of applying a processing fluid containing silica and a multivalent metal salt to a print medium; and an ink applying step of applying an ink containing a coloring material and water to the print medium. The print medium has a Cobb water absorption of 20 g/m.sup.2 or greater but 75 g/m.sup.2 or less when contacted with water for 120 seconds. The Cobb water absorption is stipulated by JIS-P8140.

A printing method includes: a processing fluid applying step of applying a processing fluid containing silica and a multivalent metal salt to a print medium; and an ink applying step of applying an ink containing a coloring material and water to the print medium. The print medium has a Cobb water absorption of 20 g/m.sup.2 or greater but 75 g/m.sup.2 or less when contacted with water for 120 seconds. The Cobb water absorption is stipulated by JIS-P8140.

A white ink includes one or more organic solvents including an amide compound represented by the following Chemical formula 1, wherein the amide compound accounts for 40 percent by mass or more of the one or more organic solvents,

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In the chemical formula 1, R.sub.1 represents a straight-chained or branch-chained alkyl group having one to six carbon atoms, R.sub.2 and R.sub.3 each, independently represent hydrogen atoms or straight-chained or branch-chained alkyl groups having 1 to 4 carbon atoms.

A white ink includes one or more organic solvents including an amide compound represented by the following Chemical formula 1, wherein the amide compound accounts for 40 percent by mass or more of the one or more organic solvents,

##STR00001##

In the chemical formula 1, R.sub.1 represents a straight-chained or branch-chained alkyl group having one to six carbon atoms, R.sub.2 and R.sub.3 each, independently represent hydrogen atoms or straight-chained or branch-chained alkyl groups having 1 to 4 carbon atoms.

An aqueous ink for ink jet, the aqueous ink containing a pigment and a resin. 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 containing a pigment and a resin. 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##

To provide an active-energy-ray-curable composition including: a (meth)acrylic acid ester compound represented by General Formula (1) below, ##STR00001##
where in the General Formula (1), R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents a hydrogen atom, an alkyl group having from 1 through 5 carbon atoms, or an alkyloxy group having from 1 through 5 carbon atoms, n is an integer of from 0 through 5, and X represents an electron-withdrawing functional group.

To provide an active-energy-ray-curable composition including: a (meth)acrylic acid ester compound represented by General Formula (1) below, ##STR00001##
where in the General Formula (1), R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents a hydrogen atom, an alkyl group having from 1 through 5 carbon atoms, or an alkyloxy group having from 1 through 5 carbon atoms, n is an integer of from 0 through 5, and X represents an electron-withdrawing functional group.