Brother Kogyo Kabushiki-kaisha

Mitsunori Maeda

Ayako Ohishi

Yasuhiro Taga

Satoshi Okuda

Shinpei Ito

Yuka Tsuzaka

Yuki Okumura

Hiroyuki Tanaka

Keisuke Yuhara

Kenjiro Imai

Kazuma Goto

Michiko Aoyama

Hideji Fukaya

Akihiko Taniguchi

Junichiro Sugimoto

Masahiro Nishizaki

Kenta Hayashida

Tatsunosuke Hoshi

Atsushi Nakamura

Miki Nishiura

Akiko Kodama

Akiko Miyajima

Chisato Okumura

A water-based ink for ink-jet recording includes: water; a solid solution pigment composed of at least a first pigment and a second pigment; and a non-solid solution pigment which is the same as the first pigment. An image L*of the first pigment has the highest chromaticness C* among those of pigments composing the solid solution pigment, the image L*having lightness L* which is closest to 60 among a plurality of solid images recorded on a recording paper by using one of aqueous dispersions containing the pigments composing the solid solution pigment at a same solid content concentration, respectively, while changing recording duty at every 5% in a range of 0% to 100%.

Water-based ink for ink-jet recording and ink set

A water-based ink for ink-jet recording includes dyes and water. The dyes include a blue dye having a hue angle of 220&#xb0; to 280&#xb0;; a yellow dye having a hue angle of 70&#xb0; to 120&#xb0;; and a copper phthalocyanine dye. A mass ratio (C/B) of a content (C) of the copper phthalocyanine dye to a content (B) of the blue dye in an entire amount of the water-based ink is equal to or more than 0.5, and a total content of the dyes in the entire amount of the water-based ink is equal to or more than 6% by mass.

Water-based ink for ink-jet recording

There is provided an ink set usable for forming an image on a recording medium which is fabric or recording paper, the ink set including: a water-based ink for ink-jet recording including a pigment, a first resin and water; and a treatment agent including a second resin and the water. The ink set satisfies the following conditions (1) to (3): condition (1): 0.9&#x2264;(B+C)/A; condition (2): 3&#x2264;A&#x2264;9; condition (3): B&#x3c;9. In the conditions (1) to (3), A: a blending amount (% by weight) of the pigment in an entire amount of the water-based ink; B: a blending amount (% by weight) of the first resin in the entire amount of the water-based ink; and C: a blending amount (% by weight) of the second resin in an entire amount of the treatment agent.

Ink set, image forming method and ink-jet recording apparatus

There is provided a treatment agent applicable to a recording surface of a recording medium which is recording paper or fabric. The treatment agent contains: a non-cationic sizing agent; and at least one cationic substance which is selected from the group consisting of: a cationic polymer capable of forming a flexible film in a case that the cationic polymer is dried, a cationic surfactant, a polyvalent metal salt and a polyvalent metal ion.

Treatment agent and ink set

An image forming method uses an apparatus for forming an image on both recording media of fabric and recording paper. The image forming method includes: applying a treatment agent to the fabric, the treatment agent coagulating a water-based ink or increasing viscosity of the water-based ink; and discharging the water-based ink onto the fabric by an ink-jet system, the water-based ink being identical to a water-based ink used for forming the image on the recording paper.

Image forming method and ink-jet recording apparatus

A water-based ink for ink-jet recording includes: a resin-dispersed pigment; an emulsion of a vinyl chloride-acrylic copolymer having a glass transition temperature of equal to or more than 50&#xb0; C.; an anionic surfactant having only one anion group in a molecule thereof; and water. A ratio (S/E) of a blending amount (S) of the anionic surfactant to a solid content blending amount (E) of the emulsion of the vinyl chloride-acrylic copolymer in an entire amount of the water-based ink is equal to or more than 0.2.

Water-based ink for ink-jet recording and ink-jet recording method

There is provided a water-based ink for ink-jet recording including: water; a self-dispersible black pigment; and a resin-dispersed pigment of which hue angle is in a range of 180&#xb0; to 270&#xb0; and of which sedimentation velocity in the water-based ink is slower than sedimentation velocity of the self-dispersible black pigment in the water-based ink. A ratio (R/S) of a solid content weight (R) of the resin-dispersed pigment to a solid content weight (S) of the self-dispersible black pigment in the water-based ink is in a range of 0.26 to 0.80.

Water-based ink for ink-jet recording and ink container

A water-based ink set for ink-jet recording includes: a water-based yellow ink containing water and a yellow dye having a blending amount in an entire amount of the water-based yellow ink of 2 to 3% by weight, the water-based yellow ink having a hue angle of 45&#xb0; to 65&#xb0;; a water-based magenta ink containing water and a magenta dye having a blending amount in an entire amount of the water-based magenta ink of 2 to 3% by weight, the water-based magenta ink having a hue angle of 340&#xb0; to 360&#xb0; or 0&#xb0; to 5&#xb0;; a water-based cyan ink containing water and a cyan dye having a blending amount in an entire amount of the water-based cyan ink of 2 to 3% by weight, the water-based cyan ink having a hue angle of 200&#xb0; to 230&#xb0;; and a water-based black ink containing water and a black dye having a blending amount in an entire amount of the water-based black ink of 6 to 7.5% by weight.

Water-based ink set for ink-jet recording and ink-jet recording apparatus

There is provided a water-based ink for ink-jet recording including: water; a self dispersible black pigment of which mean particle diameter is not less than 140 nm; and a resin-dispersed pigment which is a copper phthalocyanine-based pigment and of which sedimentation velocity in the water-based ink is slower than sedimentation velocity of the self-dispersible black pigment in the water-based ink.

There is provided an image forming method for forming an image on a recording medium which is fabric or recording paper by using an ink set including an ink and a treatment agent. In a case that the recording medium is the fabric, the image forming method includes: applying the treatment agent, which includes a cationic substance and a water-soluble organic solvent, to the fabric in an application amount of the treatment agent per an area of the fabric in a range of 4.7 mg/cmto 34 mg/cm; drying the applied treatment agent and thereby reducing weight of the treatment agent in the fabric to be not more than 50% of the application amount of the treatment agent; and jetting the ink, which includes an anionic dye and a water-soluble organic solvent, onto the fabric by an ink-jet system.

Image forming method and ink set

A water-based ink set for ink-jet recording includes: a water-based yellow ink containing a yellow pigment, a resin dispersant, and water; a water-based magenta ink containing a magenta pigment, a resin dispersant, and water; a water-based cyan ink containing a cyan pigment, a resin dispersant, and water; and a water-based black ink containing self-dispersible carbon black and water. At least one water-based color ink selected from the group consisting of the water-based yellow ink, the water-based magenta ink, and the water-based cyan ink further contains a dye. The self-dispersible carbon black has an average particle size of 120 to 170 nm.

Water-based ink set for ink-jet printing

A water-based ink for ink-jet recording includes: a colorant containing a pigment and a dye represented by the following formula (1); water; and a water-soluble resin. 

There is provided a water-based ink for ink-jet recording containing: water; at least one of quinacridone and a derivative thereof; and a dye represented by the following formula (1). 

Water-based ink for ink-jet recording and ink cartridge

There is provided a water-based ink set for ink-jet recording, including: a water-based black ink containing a self-dispersible pigment, a water-soluble organic solvent of which vapor pressure is less than 1 Pa, and water; water-based color inks of two or more colors each containing a color pigment, a resin dispersant, a water-soluble organic solvent of which vapor pressure is less than 1 Pa, and water, wherein an average value of blending amounts of the water-soluble organic solvents in all of the water-based inks constituting the water-based ink set is in a range of 15% by weight to 35% by weight, and the water-based ink set satisfies the following condition X and condition Y,

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Nagoya, Japan

Mitsunori Maeda