Seiko Epson Corporation

Shohei Shiono

Tsuyoshi Sano

Takayoshi Kagata

Ippei Okuda

Shuichi Koganehira

Koichi Toba

Shoki Kasahara

An ink set includes a first ink composition, and a second ink composition, in which the first ink composition contains a first pigment, and an alkyl diol having carbon atoms of 6 or less and a normal boiling point of 240&#xb0; C. or more, the second ink composition contains a second pigment, and the alkyl diol, in the first ink composition, a content of the first pigment is 2.5% byweightmassor more, and a content of the alkyl diol is 3% byweightmassto 15% byweightmass, in the second ink composition, a content of the second pigment is less than 2.5% byweightmass, and the content of the alkyl diol is 8% byweightmassto 30% byweightmass, and the content of the alkyl diol in the second ink composition is greater than the content of the alkyl diol in the first ink composition.

Ink set, recording method, recording apparatus, and recording material

The ink set of the invention includes a first ink composition and a second ink composition. The first ink composition contains a first pigment and an alkanediol having 6 or less carbon atoms and having a normal boiling point of 245&#xb0; C. or more. The content of the first pigment is 1.5% by mass or more, and the content of the alkanediol is 3% by mass or more and 20% by mass or less. The second ink composition contains a second pigment and a penetrant other than the alkanediol. The content of the second pigment is less than 1.5% by mass. The penetrant contained in the second ink composition has an osmotic force higher than that of the alkanediol contained in the first ink composition.

Ink set and recording method

An ink set includes a first ink composition, and a second ink composition, in which the first ink composition contains a first pigment, and an alkyl diol having carbon atoms of 6 or less and a normal boiling point of 240&#xb0; C. or more, the second ink composition contains a second pigment, and the alkyl diol, in the first ink composition, a content of the first pigment is 2.5% by mass or more, and a content of the alkyl diol is 3% by mass to 15% by mass, in the second ink composition, a content of the second pigment is less than 2.5% by mass, and the content of the alkyl diol is 8% by mass to 30% by mass, and the content of the alkyl diol in the second ink composition is greater than the content of the alkyl diol in the first ink composition.

An ink set includes a first ink composition, and a second ink composition, in which the first ink composition contains a first pigment, and an alkyl diol having carbon atoms of 6 or less and a normal boiling point of 240&#xb0; C. or more, the second ink composition contains a second pigment, and the alkyl diol, in the first ink composition, a content of the first pigment is 2.5% by weight or more, and a content of the alkyl diol is 3% by weight to 15% by weight, in the second ink composition, a content of the second pigment is less than 2.5% by weight, and the content of the alkyl diol is 8% by weight to 30% by weight, and the content of the alkyl diol in the second ink composition is greater than the content of the alkyl diol in the first ink composition.

A liquid supply device according to the invention includes a container which is filled with a liquid from a liquid storage portion, and the container includes a bottom surface portion, an upper surface portion, and a stirrer which moves in the bottom surface portion and stirs the liquid. The relationship between a height Ht in the vertical direction of a central portion in the container and a height Hb in the vertical direction of the stirrer satisfy the Expression: 0.40&#xd7;Ht&#x2266;Hb&#x2266;0.90&#xd7;Ht.

Liquid stirring device

White ink of the present invention for ink jet recording contains a white pigment having an average particle size of 200 nm to 400 nm and composed of metallic oxide, and the white ink satisfies Formula (1):0.5&#xd7;&#x2266;1.3&#xd7;&#x2003;&#x2003;(1)where A represents the white pigment content (mass %) in the white ink, and V represents the proportion (%) of the volume of the white pigment which has completely settled in the white ink to the total volume of the white ink.

White ink for ink jet recording and recording apparatus

A liquid container (ink cartridge) is provided with a containing portion (ink pack) containing a liquid including dispersed particles and a solvent in which the dispersed particles are dispersed, and a stirring member contained in the containing portion, in which the stirring member has flexible portions covering a bottom surface of the containing portion.

Liquid accommodating container and liquid ejecting apparatus

An ink set for ink jet recording is provided, the ink set including a first ink containing first resin particles and not substantially containing a colorant; and a second ink containing titanium oxide particles and containing the first resin particles in an amount less than 6 weight %, the second ink being ejected substantially at the same time as ejection of the first ink.

Ink set for ink jet recording, recording apparatus, and recorded matter

With a white image where the dryness factor is 40% to 80%, since drying has appropriately progressed, it becomes difficult for the white image and color ink to mix, and in addition, it is possible to suppress wetting and spreading of the color ink when a color image is recorded using an ink jet method with color ink which contains a colorant. Accordingly, it is possible to obtain an ink jet recording method where deterioration in image quality is suppressed.

Ink jet recording method

The liquid droplet discharge device according to this invention has a storage portion which stores liquid, a first supply pipe which is connected to the storage portion and to which the liquid is supplied from the storage portion, a container which is connected to the first supply pipe and to which the liquid is supplied from the first supply pipe, a head which discharges the liquid supplied from the container, and a stirring member which stirs the liquid in the container, in which the capacity of the container is equal to or larger than the capacity of the first supply pipe.

Liquid droplet discharge device

An ink set includes a cyan ink composition containing C. I. Pigment Blue 15:6 as a pigment; a magenta ink composition containing a quinacridone pigment selected from the group consisting of C. I. Pigment Violet 19, C. I. Pigment Red 122, C. I. Pigment Red 202, and C. I. Pigment Red 209 or a quinacridone solid solution pigment composed of at least two selected from the group; a yellow ink composition containing a pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 213, and C. I. Pigment Yellow 185; a light magenta ink composition containing a quinacridone pigment selected from the group consisting of C. I. Pigment Violet 19, C. I. Pigment Red 122, C. I. Pigment Red 202, and C. I. Pigment Red 209 or a quinacridone solid solution pigment composed of at least two selected from the group at a pigment concentration lower than that of the magenta ink composition; and a light cyan ink composition containing C. I. Pigment Blue 15:3 as a pigment at a pigment concentration lower than that of the cyan ink composition.

Ink set, recording apparatus, and recording method

An ink set includes a cyan ink composition containing C. I. Pigment Blue 15:6 as a pigment; a magenta ink composition containing a quinacridone pigment or a quinacridone solid solution pigment; a light magenta ink composition containing a quinacridone pigment selected from the group consisting of C. I. Pigment Violet 19, C. I. Pigment Red 122, C. I. Pigment Red 202, and C. I. Pigment Red 209 or a quinacridone solid solution pigment composed of at least two selected from the group, the pigment concentration being lower than that of the magenta ink composition; a light cyan ink composition containing C. I. Pigment Blue 15:3 as a pigment at a pigment concentration lower than that of the cyan ink composition; an orange ink composition containing a pigment selected from the group consisting of C. I. Pigment Orange 43 and C. I. Pigment Red 242: a green ink composition containing a pigment selected from the group consisting of C. I. Pigment Green 36 and C. I. Pigment Green 7.

An ink set includes a cyan ink composition containing C.I. pigment blue 15:6 or C.I. pigment blue 60 as a pigment and a magenta ink composition containing at least one quinacridone pigment selected from the group consisting of C.I. pigment violet 19, C.I. pigment red 122, C.I. pigment red 202, and C.I. pigment red 209, or a quinacridone solid solution pigment formed of at least two selected from the above group, as a pigment.

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Matsumoto, Japan

Shohei Shiono