Seiko Epson Corporation

Ayako Nishiki

Soichi Yamazaki

Miharu Kanaya

Hiroshi Kato

Hideki Okada

Daisuke Ishihara

Chie Maruyama

Rie Miyazaki

An ink jet recording aqueous pigment ink contains a self-dispersing pigment, a quaternary amino acid, a non-polymeric, nonionic material having a melting point of 40&#xb0; C. or more, and at least one of trialkylamine and trialkanolamine. The content of the non-polymeric, nonionic material is 3% to 15% by mass relative to the total mass of the ink jet recording aqueous pigment ink.

Ink jet recording aqueous pigment ink

An ink jet recording apparatus including an ink jet head for ejecting a water-based ink from a nozzle onto a recording medium, wherein the water-based ink contains a fatty acid and a fatty acid potassium or sodium salt with which the fatty acid is emulsified and dispersed in water.

Ink jet recording apparatus

An ink jet recording apparatus including an ink jet head for ejecting a water-based ink while moving at a speed of 0.5 m/s or more relative to a recording medium, wherein the water-based ink contains a fatty acid and a volatile alcohol, the volatile alcohol being used to emulsify the fatty acid and disperse the fatty acid in water and having a higher vapor pressure than water at 20&#xb0; C.

An ink jet recording device is provided which includes an ink jet head which has a nozzle surface where a plurality of nozzle opening ends are arranged and which ejects water-based ink from the nozzles to a recording medium and a wiping device that executes a wiping operation where the nozzle surface and a wiping member are brought into contact and the nozzle surface is wiped, where oleic acid and a dispersant for dispersing the oleic acid into water by emulsifying the oleic acid are added to the water-based ink.

Ink jet recording device

An ink set includes at least a cyan ink composition containing a self-dispersible pigment, a magenta ink composition containing a self-dispersible pigment, and a yellow ink composition containing a pigment coated with a water-insoluble polymer.

Growing community of inventors

Matsumoto, Japan

Ayako Nishiki