An ink set includes an inkjet ink and a recording head filling liquid. The inkjet ink contains a pigment, water, and 1,2-alkanediol with a carbon number of at least 7 or 8. The recording head filling liquid contains a specific surfactant, water, and a specific alcohol compound with a carbon number of at least 10 and no greater than 12. The specific surfactant has an HLB value of no greater than 5.0. An amount of content of the specific alcohol compound in the recording head filling liquid is at least 0.1 ppm and no greater than 1.0 ppm.

A recording apparatus that causes less degradation of image quality due to blurring caused by dot misalignment between an ink containing a coloring material and a reaction liquid includes a recording unit configured to record an image on a recording medium by applying an ink containing a coloring material and a reaction liquid containing a component that aggregates the coloring material, an acquisition unit configured to acquire multi-valued ink data to apply the ink, and a generating unit configured to generate first multi-valued reaction liquid data based on the multi-valued ink data and, when a tone value of a pixel of interest in the first multi-valued reaction liquid data is lower than a tone value of any one of a plurality of surrounding pixels around the pixel of interest, generate second multi-valued reaction liquid data by increasing the tone value of the pixel of interest.

The method is an ink jet recording method, which uses an ink set being composed of a plurality of aqueous inks and including a combination of a first ink containing a coloring material and a second ink containing no coloring material and by which an image is recorded by applying the first ink and the second ink onto a recording medium so that an area to which the first ink is applied and an area to which the second ink is applied overlap at least in part with each other. The coloring material of the first ink contains fluorescent dye, the second ink contains a first water-soluble organic solvent, and an SP value S.sub.S of the first water-soluble organic solvent and an SP value S.sub.D of the fluorescent dye satisfy a relationship of the following formula (1):
|S.sub.S−S.sub.D|≤4.0  (1).

An ink jet ink composition includes water, a plant-derived carbonized color material, and a lignin resin.

A method of printing an image using a printing system having first and second printheads supplied with a same ink. The method includes the steps of: allocating first lines of the image to the first printhead; allocating second lines of the image to the second printhead; dithering the first lines of the image using a selected first dither mask; dithering the second lines of the image using a selected second dither mask; printing the dithered first lines of the image using the first printhead; and printing the dithered second lines of the image using the second printhead. The first and second dither masks are selected based on a relative alignment of the first and second printheads.

A recording method includes: recording a first image on a recording medium; reading the first image to determine whether the first image is correctly recorded; and when the first image is determined as not being correctly recorded, recording a second image over the first image. The water-based recording ink includes a water-soluble organic solvent which is at least one selected from the group consisting of a glycol ether and a diol compound having six to eight carbon atoms and two hydroxyl groups, at least one of the two hydroxyl groups not being bonded to a terminal of a carbon chain of the diol compound. A content of substances having a vapor pressure of 0.03 hPa or less at 20° C. in the water-based recording ink is 10 mass % or less and a surface tension of the water-based recording ink is 30 mN/m or less.

A radiation curable inkjet ink composition that includes (A) a mono-ethylenically unsaturated oligomer, (B) a mono-ethylenically unsaturated monomer, and (C) a solvent, wherein the radiation curable inkjet ink composition is substantially free of a photoinitiator and wherein a total weight of the mono-ethylenically unsaturated oligomer (A) is less than or equal to the total weight of the mono-ethylenically unsaturated monomer (B). A printed article including the radiation curable inkjet ink composition in cured form, and a method of forming an image with a thermal inkjet printhead are also provided.

In an image processing apparatus, a processor sets a target printing method for printing a target image to one of a bidirectional printing method and a unidirectional printing method. In a case where the bidirectional printing method is set as the target printing method: the processor executes both a first generation process and a second generation process. The first generation process generates first partial print data by converting a set of partial image data using a first color conversion profile. The second generation process generates second partial print data by converting another set of partial image data using a second color conversion profile. In a case where the unidirectional printing method is set as the target printing method, the processor executes a third generation process generating third partial print data by converting a set of partial image data using a third color conversion profile.

The present disclosure provides an ink fluid set containing an aqueous pre-treatment composition, a clear ink, and colored aqueous inkjet inks. This ink fluid set is particularly suitable for printing on polyester, cotton, and blends of cotton and synthetic textiles.

An image processing apparatus comprises a first storage and a second, a plurality of image processing units that perform image processing on pixel data of image data read from the first storage or the second storage, and a writing unit that writes the pixel data, processed by the plurality of image processing units, into the second storage. The plurality of image processing units include a directivity image processing unit that performs image processing on the image data in mutually different directions by reading and supplying to an image processing unit of the plurality of image processing units the pixel data written into the second storage. Target pixel data processed by the directivity image processing unit is written into the second storage in an order of arrangement which is different from the order of arrangement of pixels in the image data stored in the first storage.