Brother Kogyo Kabushiki-kaisha

Kenjiro Imai

Mitsunori Maeda

Ayako Ohishi

Masaya Fujioka

Junichiro Sugimoto

Satoshi Okuda

Tatsunosuke Hoshi

Atsushi Nakamura

Eiji Kawamura

Ryuji Kato

Noriaki Satoh

Hideji Fukaya

Akiko Kodama

There is provided an ink tank cap configured to open and close an ink inlet port of an ink tank, the ink tank cap including a contacting portion contacting with the ink inlet port, wherein the contacting portion of the ink tank cap is formed of an ethylene-propylene-diene rubber containing silicone.

Cap for ink tank, ink tank, and ink-jet recording apparatus

An ink set includes a treatment agent containing fumed silica and a bright pigment ink containing a bright pigment and water. The treatment agent or the bright pigment ink contains urethane resin.

Ink set

There is provide an ink-jet recording apparatus including: an ink containing a resin dispersion type pigment; an ink-jet head configured to discharge the ink; an absorber which is arranged in an area facing a discharge surface of the ink-jet head, and which is configured to absorb the ink discharged from the ink-jet head; and a liquid agent which contains a water-soluble organic solvent, and which is absorbed in the absorber, wherein a surface tension of an aqueous solution containing the liquid agent at concentration of 5% by weight is not more than 50 mN/m; and a blending percentage by weight of the water-soluble organic solvent in the liquid agent is not less than seven times a blending percentage by weight of the resin dispersion type pigment in the ink.

Ink-jet recording apparatus and accumulation suppressing method

There is provide an ink-jet recording apparatus including: an ink containing a self-dispersible pigment; an ink-jet head configured to discharge the ink; an absorber which is arranged in an area facing a discharge surface of the ink-jet head, and which is configured to absorb the ink discharged from the ink-jet head; and a liquid agent which contains a water-soluble organic solvent, and which is absorbed in the absorber, wherein a surface tension of an aqueous solution containing the liquid agent at concentration of 5% by weight is not more than 50 mN/m; and a blending percentage by weight of the water-soluble organic solvent in the liquid agent is not less than five times a blending percentage by weight of the self-dispersible pigment in the ink.

A recording method includes applying, to a recording medium, a treatment agent containing inorganic fine particles; discharging a bright pigment ink containing a bright pigment and water to a portion of the recording medium to which the treatment agent has been applied; and discharging a water-based pigment ink containing a pigment different from the bright pigment and water to the portion of the recording medium to which the bright pigment ink has been discharged.

Recording method

An ink set including: a treatment agent containing 2,2,4-trimethyl-1,3-pentanediol-1-monoisobutyrate or a derivative thereof; and a bright pigment ink containing a bright pigment and water, wherein the treatment agent or the bright pigment ink contains urethane resin; and the ink set satisfies the following conditions (A) and (B):1&#x2266;&#x2266;6&#x2003;&#x2003;(A)0.2&#x2266;&#x2266;2&#x2003;&#x2003;(B)

Ink set and recording method

A recording method includes: applying, to a recording medium, a treatment agent containing inorganic fine particles; discharging a water-based dye ink containing a dye and water to a portion of the recording medium to which the treatment agent has been applied; and discharging a bright pigment ink containing a bright pigment and water to the portion of the recording medium to which the water-based dye ink has been discharged.

Disclosed is a treatment solution for ink jet recording, including: an aggregating agent; water; and tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether, wherein: tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether are contained by 1 % by weight to 10 % by weight in total in the treatment solution; and a weight ratio (X:Y) of tetraethylene glycol monobutyl ether (X) to pentaethylene glycol monobutyl ether (Y) is 50:50 to 90:10.

Treatment solution for ink-jet recording, water-based ink set for ink-jet recording, ink-jet recording method, and ink-jet recording apparatus

Disclosed is a water-based ink for ink jet recording, including: a colorant; water; and tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether, wherein: tetraethylene glycol monobutyl ether and pentaethylene glycol monobutyl ether are contained by 1% by weight to 10% by weight in total in the water-based ink for ink jet recording; and a weight ratio (X:Y) of tetraethylene glycol monobutyl ether (X) to pentaethylene glycol monobutyl ether (Y) is 50:50 to 90:10.

Water-based ink for ink-jet recording, ink cartridge, water-based ink set for ink-jet recording, ink-jet recording method, and ink-jet recording apparatus

Growing community of inventors

Toyohashi, Japan

Kenjiro Imai