Abstract: A liquid containing bag includes a liquid filling opening part having a tube configuration through which an inside of the liquid containing bag is filled with liquid. The liquid filling opening part is melt-sealed from directions which face each other in a part of the liquid filling opening part. The part which is melted has a non-symmetrical configuration.

Abstract: An ink bag comprises a flexible bag body of a generally rectangular form and a holding member attached to one edge of the bag body, wherein the holding member includes: an ink filling opening for filling the bag body with ink; an ink discharging opening for discharging the ink inside the bag body; and an engaging part for holding the ink bag to a cartridge case in which the ink bag is accommodated.

Abstract: A liquid containing bag includes a liquid filling opening part having a tube configuration through which an inside of the liquid containing bag is filled with liquid. The liquid filling opening part is melt-sealed from directions which face each other in a part of the liquid filling opening part. The part which is melted has a non-symmetrical configuration.

Abstract: A liquid containing bag includes a liquid filling opening part having a tube configuration through which an inside of the liquid containing bag is filled with liquid. The liquid filling opening part is melt-sealed from directions which face each other in a part of the liquid filling opening part. The part which is melted has a non-symmetrical configuration.

Abstract: An ink bag comprises a flexible bag body of a generally rectangular form and a holding member attached to one edge of the bag body, wherein the holding member includes: an ink filling opening for filling the bag body with ink; an ink discharging opening for discharging the ink inside the bag body; and an engaging part for holding the ink bag to a cartridge case in which the ink bag is accommodated.

Abstract: A mixing device for preparing an ink including: a mixing vessel including an injection nozzle and a discharge opening, both of which are provided on a bottom surface of the mixing vessel, wherein the injection nozzle faces in substantially a horizontal direction along a side surface of the mixing vessel to swirl the ink along the side surface, and the discharge opening is located on a downstream side from the injection nozzle relative to the swirling direction and at a position between the center of the bottom surface and the side surface; a connector connecting the injection nozzle with the discharge opening; and a pump configured to transport the ink from the discharge opening to the injection nozzle through the connector and inject the ink into the mixing vessel from the injection nozzle while applying a pressure to the ink.

Abstract: A liquid containing bag includes a liquid filling opening part having a tube configuration through which an inside of the liquid containing bag is filled with liquid. The liquid filling opening part is melt-sealed from directions which face each other in a part of the liquid filling opening part. The part which is melted has a non-symmetrical configuration.

Abstract: A mixing device for preparing an ink including: a mixing vessel including an injection nozzle and a discharge opening, both of which are provided on a bottom surface of the mixing vessel, wherein the injection nozzle faces in substantially a horizontal direction along a side surface of the mixing vessel to swirl the ink along the side surface, and the discharge opening is located on a downstream side from the injection nozzle relative to the swirling direction and at a position between the center of the bottom surface and the side surface; a connector connecting the injection nozzle with the discharge opening; and a pump configured to transport the ink from the discharge opening to the injection nozzle through the connector and inject the ink into the mixing vessel from the injection nozzle while applying a pressure to the ink.

Abstract: An image recording method for forming an image on a recording material includes the steps of (a) applying to a recording material a colorless or light colored image recording acceleration liquid containing a compound which is capable of making insoluble a coloring agent contained in a recording liquid which comprises the coloring agent and a solvent for dispersing or dissolving the coloring agent, and (b) depositing the recording liquid imagewise on the recording material by ejecting the recording liquid in the form of droplets onto the recording material, the image recording acceleration liquid further containing at least one of surfactants represented by any of formulae (1) to (5) as specified in the specification, and an image formation apparatus for carrying out the above image formation method is provided.

Abstract: An aqueous ink composition contains a colorant and a humectant, and has a surface tension &ggr; of less than 50 mN/m when measured by a maximum bubble pressure method at 25° C., with a bubble frequency &ngr; of the aqueous ink composition being set at less than 1 Hz, and a surface tension &ggr; of more than 40 mN/m when measured by the maximum bubble pressure method at 25° C., with the bubble frequency &ngr; of the aqueous ink composition being set at more than 5 Hz. In addition, an ink-jet printing method for forming ink images on an image-receiving medium has the step of ejecting the above-mentioned aqueous ink composition in the form of droplets according to the recording signals at a recording frequency of 8 kHz or more.

Abstract: A set of color ink compositions for ink-jet printing includes yellow, magenta and cyan ink composition, each of which having water, a water-soluble coloring agent, a wetting agent, a surfactant and an antiseptic and mildewproofing agent, and the yellow ink composition has the lightness index L* of 95.+-.5 and the chromaticness indices a* and b* of respectively -6.+-.5 and 23 .+-.12, the magenta ink composition has the lightness index L* of 75.+-.5 and the chromaticness indices a* and b* of respectively 55.+-.25 and -28.+-.10, and the cyan ink composition has the lightness index L* of 87.+-.5 and the chromaticness indices a* and b* of respectively -35.+-.10 and -19.+-.8.

Abstract: An image recording method for forming an image on a recording material, using a recording liquid which contains a coloring agent and a solvent in which the coloring agent is dispersed or dissolved, includes the steps of applying to a recording material a colorless or light colored image recording acceleration liquid containing a surfactant and a viscosity-increasing compound capable of increasing the viscosity of the recording liquid, and depositing the recording liquid imagewise on the recording material by ejecting the recording liquid in the form of droplets onto the recording material, and an image recording apparatus for carrying out the above image recording method is provided.

Abstract: An aqueous ink composition contains a colorant and a humectant, and has a surface tension .gamma. of less than 50 mN/m when measured by a maximum bubble pressure method at 25.degree. C., with a bubble frequency .nu. of the aqueous ink composition being set at less than 1 Hz, and a surface tension .gamma. of more than 40 mN/m when measured by the maximum bubble pressure method at 25.degree. C., with the bubble frequency .nu. of the aqueous ink composition being set at more than 5 Hz. In addition, an ink-jet printing method for forming ink images on an image-receiving medium has the step of ejecting the above-mentioned aqueous ink composition in the form of droplets according to the recording signals at a recording frequency of 8 kHz or more.

Abstract: A recording ink composition contains a colorant which is soluble or dispersible in water and includes at least one phthalocyanine compound of formula (1) which may have a halogen atom as a substituent and at least one of phthalocyanine compounds of formulas (2) and (3); a dispersant which includes at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and/or at least one surfactant having an alkyl group having 5 or more carbon atoms; water; and a humectant. In addition, images with a resolution of 10 dots/mm.times.10 dots/mm or more can be recorded on an image receiving medium by ejecting the above-mentioned recording ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a Stockigt size degree of 3 seconds or more, with the recording ink composition being deposited in an amount of 20 pl/mm.sup.2 to 200 pl/mm.sup.2 on the image receiving medium.

Abstract: A recording ink composition includes a colorant comprising a pigment which is soluble or dispersible in water, and a polymeric dye having a weight average molecular weight in a range of 5,000 to 15,000, a dispersant including at least one dispersant component selected from the group consisting of at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and/or at least one surfactant having an alkyl group having 5 or more carbon atoms, water, and a water-soluble organic solvent, and a method of recording images on an image receiving medium is performed, using the recording ink composition.