Abstract:
An image correcting method for an ink jet recording apparatus for recording an image by ejecting ink onto a recording material using a recording head having an array of a plurality of nozzles for ejecting the ink, the method includes the steps of an outputting step of outputting at least two kinds of uniform patterns for detection of a recording property of a recording head; a measuring step of measuring a density distribution of the patterns outputted by the outputting step; a calculation step of calculating, for each of the kinds of patterns, data for correction for respective one of the plurality of nozzles on the basis of a result of the measuring step: an image correcting step of comparing data corresponding to the at least two kinds of patterns, classifying states of the plurality of nozzles, and correcting images corresponding to respective ones of the plurality of nozzles, wherein the correcting step effects correction processes which are different from depending on the classification.
Abstract:
An ink jet printing method and apparatus using a color ink and a print performance improving ink which minimizes an image quality degradation due to blank lines formed by failed or faulty nozzles. This system enables the use of a print head even with failed or faulty nozzles by minimizing the image quality degradation and extends the life of the print head before replacement. The print performance improving ink is deliberately ejected onto a blank line or its vicinity to produce the so-called primer effect, thereby inducing the color ink dots on the lines adjoining the non-ejecting nozzle line to spread into the blank line to make the blank line undistinguishable.
Abstract:
High quality images showing an excellent fixation are formed by an ink-jet recording method using pigment inks. An ink set for the ink jet-recording method comprises a first ink containing an anionic dye in an aqueous medium, a second ink containing an anionic dye and having a lower coloring material content than the first ink and a dispersion destabilizing substance, and a third ink containing a self-dispersible first pigment, a second pigment and a polymeric dispersant for dispersing the second pigment in an aqueous medium. The dispersion destabilizing substance destabilizes the dispersion stability of at least either the first pigment or the second pigment in the third ink when the second ink and the third ink are brought into contact with each other. The second ink and the third ink are applied onto a printing medium one after another or substantially simultaneously so that they are brought into contact with each other in a liquid state on the printing medium.
Abstract:
There are provided a plain paper mode in which printing is performed on a plain paper and a special medium mode in which printing is performed on a special printing medium having a coat layer formed thereon. In the plain paper mode, Bk ink using both self-dispersing type pigment and dye as coloring materials is ejected from a Bk head, then a processing liquid with a high penetrability which insolubilizes the above coloring materials is ejected from a S head. On the other hand, in the special medium mode, the above Bk ink is ejected from the Bk head, but no processing liquid is ejected from the S head. As a result, this enables the improvement in a print quality, such as OD level, and a high-speed fixing in ink-jet printing in either case where a printing medium having a coat layer formed thereon is used or where the plain paper is used.
Abstract:
An ink which includes a first pigment, a second pigment, a polymer dispersant and an aqueous medium; wherein the first pigment is a self-dispersing pigment having on its surface at least one anionic group bonded to the surface directly or via an atomic group, the second pigment is dispersed in the aqueous medium by the polymer dispersant, and the polymer dispersant contains benzylmethacrylate as a monomer unit, or the polymer dispersant contains benzylmethacrylate as a monomer unit. Diffusion of this ink in the printing medium is suppressed in the cross-sectional direction but not horizontal direction. Thus, the ink can form an ink dot that has a proper dot size, uniform and high density in the dot, with little feathering or blur.
Abstract:
In an image printed by a printing apparatus, graininess particularly in a light part of the printed image is reduced by relatively simple structure by using a second color. To do so, magenta and cyan color component data in image data is subjected to under color removal to generate image data of a blue ink being the secondary color. On the basis of the data of the blue ink replaced for magenta and cyan, printing is performed by forming dots of the blue ink. At this time, black data is distributed into dark black and light black by density distribution, and the light black is substituted by the blue and yellow inks, whereby it is possible by the simple structure to prevent the graininess appeared when the cyan and magenta dots mutually appear biasedly and the graininess due to the black ink dots.
Abstract:
Provided is an ink-jet printing method comprising the steps of penetrating a treating liquid which contains a component to react chemically with a pigment in an ink and has a penetrability onto a surface layer of a printing medium and the impacting ink-droplets containing the pigment to a portion among a whole surface of the printing medium where the treating liquid has been imparted, wherein a penetrating depth of the pigment applied to the treating liquid on the surface layer of the printing medium is deeper than a penetrating depth of the pigment alone applied to the printing medium on which no treating liquid is imparted and is shallower than a penetrating depth of the treating liquid.
Abstract:
An ink jet printing apparatus, for each level, employs a plurality of density patterns to prevent cancellation of a granularity reduction effect that has been provided by an increase in resolution. Specifically, when determining an arrangement of dot-on areas in the density pattern, the dot-on areas is not located in the areas of a first row of the each of the plurality of density patterns. Thereby, whitish areas appear with the same cycle as a use cycle of the density patterns in a longitudinal direction and thus the whitish areas is not unevenly located. As a result, granularity is prevented from increasing.
Abstract:
An ink jet printing apparatus, for each level, employs a plurality of density patterns to prevent cancelation of a granularity reduction effect that has been provided by an increase in resolution. Specifically, when determining an arrangement of dot-on areas in the density pattern, the dot-on areas is not located in the areas of a first row of the each of the plurality of density patterns. Thereby, whitish areas appear with the same cycle as a use cycle of the density patterns in a longitudinal direction and thus the whitish areas is not unevenly located. As a result, granularity is prevented from increasing.
Abstract:
When a feeding amount for multi-pass printing is changed, the purpose related to an image quality using a binary data generation pattern can still be attained by, for example, a density pattern method. Specifically, a multi-pass printing mode is identified, and a density pattern selection matrix associated with a cycle of binary data generation is selected in accordance with the selected printing mode. That is, a density pattern selection matrix employed for binary data generation using a density pattern is changed to a size corresponding to the feeding amount designated by the selected printing mode. Thereby, a phenomenon that a unit used for image processing to gain a predetermined purpose related to an image quality does not match a unit area used for a printing operation is avoided, and an image printing purpose using a binary data generation pattern can be appropriately attained.