Canon Kabushiki Kaisha

Yoshihide Aikawa

Kouhei Nakagawa

Shinichi Sato

Hideyuki Saito

Minako Kawabe

Kunihiko Nakamura

Jun Yoshizawa

Shin-ichi Sato

Kuniaki Fujimoto

Masanori Jinnou

Sadayuki Sugama

Eiichi Nakata

Takeshi Miyazaki

Tomohiro Yamashita

Mikio Sanada

Masashi Hirose

Yasuaki Murai

Daiji Okamura

Yoshihisa Takizawa

Yuko Sato

Akira Kuriyama

Masanori Yoshida

Isao Ebisawa

Shigemoto Abe

Kumiko Mafune

Takao Yamamoto

Yoshito Mizoguchi

Tsuyoshi Kanke

Mamiko Kaji

Yutaka Tani

Arihiro Saito

Kaoru Takahashi

Yojiro Kojima

Yoshio Kinoshita

Masahiro Suenaga

Yuko Takada

Sayoko Nagashima

Ryosuke Nagao

Kazuya Nushiro

Provided is an ink jet recording method by which even when a recording medium having a relatively small basis weight or a highly water-absorbing recording medium is used, an image can be recorded while the occurrence of cockling is suppressed. The method is an ink jet recording method including recording an image on a recording medium with an ink jet recording apparatus including a blowing portion configured to blow air to the recording medium to dry an aqueous ink. The blowing portion includes conveying members and a blowing device. The conveying members include a first conveying member free of an adsorption mechanism and a second conveying member including an adsorption mechanism in the stated order. The aqueous ink includes a water-soluble organic solvent.

Ink jet recording method and ink jet recording apparatus

To provide an ink jet recording method which can record an image on a recording medium irrespective of what material is selected therefor. The ink jet recording method is a method of recording an image on a recording medium with a colorless transparent aqueous ink and includes a step of applying, to the recording medium, the aqueous ink containing a mineral acid and having a pH of 1.0 or less; and a step of forming carbon by making use of the mineral acid.

Ink jet recording method

The ink jet recording method using an ink jet recording apparatus including: a first ink and a second ink; and a recording head including a plurality of recording element substrates in which a first ejection orifice array for ejecting the first ink and a second ejection orifice array for ejecting the second ink are sequentially arranged in a predetermined direction, wherein the plurality of recording element substrates are arranged to be adjacent to each other in a predetermined direction, includes: a recording step of ejecting the ink from the recording head disposed so that an angle formed between the ejection orifice surface of the recording head and the direction of gravity is 0&#xb0; or more to less than 90&#xb0; to record an image on the recording medium, wherein a brightness of the first ink is lower than a brightness of the second ink.

A ink jet recording method, which uses an ink jet recording apparatus including: first and second inks each containing a coloring material; and a recording head having an ejection orifice surface in which a first ejection orifice array for ejecting the first ink and a second ejection orifice array for ejecting the second ink are formed, the first and second ejection orifice arrays being sequentially arranged from the bottom in the direction of gravity to be adjacent to each other and at least partially overlap each other, includes recording, wherein at least one of the first and second inks contains a resin, and a content of the resin in the second ink is smaller than a content of the resin in the first ink.

An ink jet recording method, which uses an ink jet recording apparatus including: first and second inks corresponding to aqueous inks containing a pigment; a recording head in which a first ejection orifice array for ejecting the first ink and a second ejection orifice array for ejecting the second ink are sequentially arranged from the bottom in the direction of gravity to be adjacent to each other and the first and second ejection orifice arrays are arranged to at least partially overlap each other; and a cleaning member, includes: recording; and cleaning, wherein at least one of the first and second inks contains a resin, and a content of the resin in the second ink is larger than a content of the resin in the first ink.

The ink jet recording method, which uses an ink jet recording apparatus, including: a first ink and a second ink containing a pigment; and a recording head having an ejection orifice surface in which a first ejection orifice array for ejecting the first ink and a second ejection orifice array for ejecting the second ink are formed, wherein the first ejection orifice array and the second ejection orifice array are sequentially arranged from the bottom in the direction of gravity to be adjacent to each other and arranged to at least partially overlap each other, includes: a recording step, wherein a true specific gravity of the pigment in the first ink is smaller than a true specific gravity of the pigment in the second ink.

An ink jet recording method includes: performing application of aqueous ink onto a unit area by one relative scanning with a recording head and a recording medium to record an image, wherein the aqueous ink comprises a self-dispersion pigment, a urethane resin, and polyethylene glycol, a kind of the self-dispersion pigment is carbon black, number average molecular weight of the polyethylene glycol is 600 or more, and viscosity of the aqueous ink is 5 mPa&#xb7;s or more.

Ink jet recording method and ink jet recording device

There are provided a new compound which has the following general formula (1) and which is useful as a coloring material, an ink containing the compound, an ink cartridge containing the ink and an ink jet recording method including ejecting the ink from a recording head of an ink jet system to record an image on a recording medium. 

Compound, ink, ink cartridge and ink jet recording method

It is an object to provide an ink that forms an image which is superior in color developability, has high environmental gas resistance, and further has superior bronze resistance. The ink comprising at least a coloring material is wherein the coloring material comprises a compound represented by a following general formula (I) or a salt thereof; the coloring material comprises a compound represented by a following general formula (I) or a salt thereof; and the maximum absorption wavelengths obtained by measuring an absorbance of a liquid prepared by diluting 2,000 times the ink with 90 mass % of N,N-dimethylformamide aqueous solution are respectively in a range of 580 nm or more and 640 nm or less and in a range of 650 nm or more and 700 nm or less; and a ratio B/A of 0.75 or more and 0.90 or less, wherein A is an absorbance at a maximum absorption wavelength in the range of 580 nm or more and 640 nm or less, and B is an absorbance at the maximum absorption wavelength in a range of 650 nm or more and 700 nm or less. 

Ink, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus

The present invention aims to provide an ink tank which can elongate the lifetime of ink jet recording apparatus and further stores therein an ink which can achieve superior image characteristics such as image fastness. The present invention provides an ink tank which includes an ink storage portion storing an aqueous ink therein, having fine channels which retain the aqueous ink by capillary force, wherein the aqueous ink includes at least water and a water-soluble coloring material, and further includes a compound satisfying specific requirements.

Ink tank, ink jet recording method, and ink tank regeneration process

A water-based ink that comprises a water-soluble anionic colorant, an aluminum ion and an acid ion, wherein the content of the acid ion is more than that of the aluminum ion, and the content of the water-soluble anionic colorant is 20 to 1,000 times as much as that of the acid ion by molar ratio.

Water-based ink and ink recording method

Provided is an ink jet ink containing a coloring material having a buffer region in an ink use range, the ink jet ink being capable of suppressing the occurrence of the deterioration (dissolution) of a heating portion surface in contact with liquid; and the disconnection of wiring for applying a voltage to a heating portion even when long term continuous printing is performed. The ink jet ink is used for an ink jet recording apparatus equipped with a recording head having a heating portion surface in contact with liquid comprising a metal and/or a metal oxide. The ink jet ink contains a coloring material in a content (mass %) of 3 mass % or more with respect to the total mass of the ink jet ink. The coloring material is a colorant having a buffer region in an ink use range, and comprises a compound represented by the following general formula (I) and/or a compound represented by the following general formula (II) H(OCHCH)R. &#x2003;&#x2003;General formula (II)

Ink jet ink, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus

A water-based ink containing a water-soluble dimer coloring material having a molecular structure having two chromophores and being symmetrical via a decomposable linking group, a water-soluble monomer coloring material having the same structure as the molecular structure obtained by the decomposition of the linking group in the water-soluble dimer coloring material, and a first water-soluble organic solvent which is a triol compound being liquid at normal temperature and having less than 5 carbon atoms, capable of restraining the water-soluble dimer coloring material from being decomposed. The water-soluble monomer coloring material is from 1% or more to 12% or less in weight with respect to the weight of the water-soluble dimer coloring material. Also disclosed are an ink tank holding therein this ink, and an ink-jet recording process carried out using this ink.

Water-based ink, ink tank having the same, and ink-jet recording process

Provided is an ink jet ink comprising at least a coloring material comprising a compound represented by the general formula (I) or a salt thereof; and a compound represented by the general formula (II). Thereby, there can be provided an ink jet ink that provides image quality comparable to silver halide photograph and provides a recorded article having high light fastness 

Ink jet ink, ink set, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus

There is provided an ink jet light-color ink which is excellent in color developability and is capable of achieving compatibility between environmental gas resistance and bronze resistance. The ink jet light-color ink to be used in combination with ink jet deep-color ink has a relatively large coloring material content, and comprises at least water, a water-soluble organic solvent, and a coloring material. The ink jet deep-color ink and the ink jet light-color ink satisfy specific conditions.

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Kanagawa, Japan

Yoshihide Aikawa