Toyocolor Co., Ltd

Artience Co., Ltd.

Riho Morita

Kazushi Sunaoshi

Takanori Nomura

Norio Suzuki

An embodiment of the present invention relates to an aqueous inkjet ink containing a pigment, a binder resin, a water-soluble organic solvent, an unmodified acetylene diol-based surfactant (A1), and an alkylene oxide-modified acetylene diol-based surfactant (A2) having an HLB value of 4 to 10, wherein contents of the unmodified acetylene diol-based surfactant (A1) and the alkylene oxide-modified acetylene diol-based surfactant (A2) are defined, and a ratio between the content of the unmodified acetylene diol-based surfactant (A1) and the content of the alkylene oxide-modified acetylene diol-based surfactant (A2) is 10 to 5,000.

Aqueous inkjet ink and printed matter

Provided is a pretreatment liquid comprising resin particles (A), calcium ions, plural types of carboxylate ions including at least a hydroxycarboxylate ion, and water. The resin particles A include resin particles (A1) selected from the group consisting of (meth)acrylic resin particles, urethane (urea) resin particles, and urethane-(meth)acrylic resin particles and having a solubility parameter (SP) value of from 9.0 to 13.5 (cal/cm), and a ratio of the amount of the resin particles (A) to an amount of the calcium ions in millimoles is specified. Also provided are an ink set containing the pretreatment liquid and a water-based inkjet ink, and a printed matter produced using the ink set.

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Tokyo, Japan

Riho Morita