Abstract: A recording method includes the steps of ejecting ink onto a recording material on the basis of image data; and ejecting record quality improving liquid to improve a record quality of the ink ejected onto the recording material; wherein one of the ink ejecting step and the liquid ejecting step is carried out after the other; the liquid ejecting step ejects the liquid to a part of an ink-ejection-area on the recording material to provide liquid-ejection-area and non-liquid-ejection-area.

Abstract: A liquid jet recording method using thermal energy to eject liquid from a liquid passage through an ejection outlet, the liquid passage being provided with a heat generating resistor, wherein the following conditions are satisfied: S1≧S2/3, and S2≧S3/3 where S1 is an area of the heat generating resistor, and S2 is a projected area, onto a surface having the heat generating resistor, of the liquid passage between the ejection outlet and the heat generating resistor; wherein a bubble created by the heat generating resistor communicates with ambience when the liquid is ejected.

Abstract: A liquid jet recording method includes applying thermal energy to liquid in a liquid passage to produce film boiling of the liquid to produce a bubble; permitting the bubble to communicate with ambience; wherein the liquid passage is not blocked in the communicating step.

Abstract: An in ink jet printing method and apparatus are disclosed which prevents mixing of ink with a liquid insolubilizing and/or agglomerating the ink and which can print images having excellent water resistance and high quality. Prevention of mixing of the ink with the liquid is achieved by separately arranging an ink receiver for receiving ink ejected by preliminary ejection and the liquid insolubilizing and/or agglomerating the ink ejected by preliminary ejection, or by setting the distance between the ink jet cartridge for the liquid and the cartridge for ink adjacent thereto is made larger than the distance between two adjacent ink jet cartridges. Alternatively, the direction of ejecting ports of an ink jet ejectors may be deviated.

Abstract: An ink jet recording apparatus comprises a recording head adapted for ejecting at least two colors of ink, a discriminater for discriminating between character data and bit map data, and a controller for selecting a character data recording mode or a bit map data recording mode in accordance with a discrimination result by the discriminater. The controller controls an amount of ink ejection in the bit map data recording mode to be less than that in the character data recording mode.

Abstract: An ink jet recording apparatus which carries out, in a decimated multipass print mode, paper transfer by an extra amount (2.5 .mu.m) beyond a standard paper transfer amount corresponding to a quarter of the total number of nozzles in the nozzle arrangement of a recording head. This can displace dots formed in subsequent scannings from dots formed in previous scannings by amounts of 2.5 .mu.m, 5 .mu.m, 7.5 .mu.m and 10 .mu.m, and reduce the overlap of the dots at boundary regions in the decimated multipass print mode. In a one pass print mode, the paper transfer amount per scanning is set less than the sum total of the four paper transfer amounts of the decimated multipass print mode so that dot overlaps take place as countermeasures against paper transfer errors.

Abstract: A printing head having a nozzle group for ejecting an ink and a nozzle group for ejecting a printing ability improving liquid is used, and printing control is made so that the number of scannings of the printing head is increased as a print duty increases, thereby reducing generation of mist due to rebounding of the ink or the printing ability improving liquid from a printing medium side.

Abstract: An ink jet recording apparatus comprises a carriage movable in a given direction with a recording head which is detachably mountable on it and provided with discharge ports for discharging liquid. The apparatus is arranged to include a sensor for detecting the presence or absence of the carriage, the recording head, and at least one of the ink containers. This sensor is provided for the main body of the apparatus and positioned within the movable range of the carriage. With this arrangement, it is possible to simplify the structure required for detecting whether or not these vital elements for recording are installed without any auxiliary power-supply or memory means.

Abstract: An ink-jet recording apparatus ejects droplets of a recording-improvement liquid on a boundary line between two different color portions of an image by using an ink-jet recording head. The ink-jet recording head comprises a group of nozzles for ejecting the recording-improvement liquid which is responsible for precipitating or condensing a coloring substance in the ink. Accordingly, a high-quality image that comprises black-color portion with a high image density without causing any feathering and multiple-color portions without a spread of ink can be obtained.

Abstract: An ink jet printing method prints an image on a printing medium by ejecting ink and printabilty improvement liquid containing a substance for improving printablity of the ink to the printing medium. At this time, ejection of the ink and ejection of the printability improvement liquid onto the printing medium are achieved such that the position where the printability improvement liquid is applied and the position where the ink is applied are different from each other, but partially overlap when the ejected printability improvement liquid comes into contact with the ejected ink on the printing medium.

Abstract: A head for discharging yellow ink, magenta ink, cyan ink and first black ink having a relatively fast penetration velocity to a recording medium and a head for discharging second black ink having a relatively low penetration velocity are used to print an image. When a black image is adjacent to a color image, the black image is formed by using the first black ink, and when the black image is not adjacent to the color image, the black image is formed by using the second black ink. A black ink and a plurality of color inks having a different penetration velocity to a recording medium than that of the black ink are also used to print an image.

Abstract: An ink jet printing method for performing printing onto a printing medium with the use of both of a colored ink ejected from an ink jet head and a printing property improving liquid to be applied to the printing medium for improving a printing property for an ink jet printing apparatus, having the steps of: at least one time or more printing a first colored ink on the printing medium, at least one time or more applying the printing property improving liquid onto a region printed with the colored ink, and at least one time or more printing a second colored ink on a region where the printing property improving liquid is applied.

Abstract: In an ink jet head having an ink discharge head for discharging an ink, and a liquid discharge head for discharging a print improving liquid given to a printing medium for improving printability in ink jet printing, the liquid discharge head 2002 is disposed to be sandwiched between colored discharge heads 2001 and 2003 for discharging at least one set of colored inks with respect to a scanning direction. This provides an ink jet head for optimally utilizing a pre-feed technique and/or a follow feed technique in ink jet printing.

Abstract: When the color printing is performed using a recording head arranged such that number of nozzles for discharging black ink is greater than the number of nozzles for discharging inks of other colors, the use frequency of some nozzles among all the nozzles for discharging the black ink is higher, so that image unevenness may arise when transferred to the black printing. The present invention relates to an ink jet recording method and an ink jet recording apparatus in which the image unevenness often seen in the black printing involving the use of more nozzles than other colors, and the blur of recorded image seen in the image having black images adjacent color images located are reduced.

Abstract: Whether or not a color image is present adjacent to a black image is discriminated. Whether the black image is formed using a black ink or a plurality of color inks C, M, and Y is determined in accordance with the discrimination result. When the black image is formed using the plurality of color inks, it is recorded using a repetitive pattern of two of C, M, and Y so as to prevent blurring with the color image, and to improve fixing characteristics by decreasing the total ejection amount.

Abstract: In a jet recording method, a recording material is placed in a path defined by a nozzle leading to an ejection outlet, and then heated by actuating a heater disposed within the nozzle to generate a bubble within the recording material, thus ejecting a droplet of the recording material out of the ejection outlet under the action of the bubble to be attached onto recording paper. As improvement, the recording material is pre-heated by actuating the heater before the heating for generating the bubble, and the generated bubble is caused to communicate with ambience. As a result, the ejection of the recording material droplet is stabilized without causing splash or mist.

Abstract: A method and an apparatus for ink jet printing use a print head including a first nozzle group for discharging a first ink, a second nozzle group for discharging a second ink and a third nozzle group for discharging a printability improving solution. The third nozzle group is displaced between the first nozzle group and the second nozzle group. The first nozzle group discharges the first ink on the printing medium based on image data to form an image, the third nozzle group discharges the printability improving solution on the image formed on the printing medium by means of another step, and the second nozzle group discharges the second ink on the image formed on the printing medium. The printability improving solution has higher penetrability into the printing medium compared to the ink.The method and apparatus can attain a clear colored, high density image without color mixing, which has high water resistance on plain paper, with a low running cost.

Abstract: When a black image region is printed, the overall pixels in the region is printed by a black ink. Then, a cation type cyan ink which makes a coloring agent in the ink insoluble is printed on the pixels of a predetermined pattern. By this, the dye of the black ink is maintained near the surface of the printing medium to increase density of the black image. At the same time, for preventing variation of tone of the black image, the pixels of the predetermined pattern are printed by a yellow ink.

Abstract: Disclosed is a color ink jet recording method including the step of recording a desired color image on a recording medium on the basis of recording data using a black ink and a plurality of color inks each being different from the black ink in permeating characteristics against the recording medium. In this method, the surface tension is 40 dyn/cm or less for each of the inks; and the blotting factor against plain paper is 2.5 or less for the black ink, and it is in the range of from 2.5 to 3.5 for each of the color inks. Alternatively, the surface tension is 40 dyn/cm or less for each of the inks; and the permeating rate against plain paper is one second or more for the black ink, and it is less than one second for each of the color inks.

Abstract: A recording head includes a liquid ejecting outlet, a liquid passage communicating with the ejection outlet, and a heat generating resistor for supplying heat to the liquid in a heat acting portion in the liquid to create a bubble in the liquid passage to eject the liquid through the ejection outlet. A cross-sectional area of the liquid passage increases from the heat acting zone toward the ejection outlet, and this improves performance while also improving head durability.