Abstract: A polymeric dispersant having an affinity with a supercritical fluid is provided, in which a substituent having an affinity with a supercritical fluid is attached to the terminal end of a block copolymer. The polymeric dispersant can disperse a dispersoid to particulate size by lowering surface tension between the dispersoid and the supercritical fluid to promote diffusion of the supercritical fluid into the dispersoid.

Abstract: An ink composition including an azo-based colorant and an ink set using the same. More particularly, an ink composition which uses a lithium salt and a derivative including hydroxynaphthalene of a chromophore as colorants, and includes etriol and an acetylene glycol-based compound, and an ink set using the same.

Abstract: An ink composition including a colorant, a cyclic amide compound, a cyclic dicarbonyl compound, and water, an ink cartridge including the same, and an inkjet recording apparatus including the same. The ink composition maintains high solubility and stability of a colorant, even when used in small amounts, thereby enhancing not only a storage stability but also a fusing property of the ink composition on a print medium, and thus reinforces a rubbing resistance of the ink composition on the print medium. The ink composition is easily dried on the print medium, and thus bleeding between colors is minimized, thereby improving printed image quality because little or solvent having a high boiling point is used in the ink composition.

Abstract: An ink composition and ink set makes a change of image color due to exposure to light incapable of being easily perceived. The ink composition and ink set for an inkjet printer which prints a color image by using three inks of yellow, magenta and cyan colors has features that each of the three colored inks have CIELab hue angles which move in the same direction (clockwise direction or counter-clockwise direction). Accordingly, the ink composition and ink set can maintain the color balance to the maximum even if the ink is faded due to light, thereby preserving the high quality color image for a long period.

Abstract: An ink set includes at least one kind of color ink, wherein each ink includes a coloring agent, an organic solvent, and water. When the at least one kind of color ink has a color region shifted from a standard color region in the CIE-La*b* color coordinate system, a color region of ink, which is a complementary color of the at least one kind of color of ink having the shifted color region in the color coordinate system, is controlled to widen a color gamut so that clear and various color images are produced.

Abstract: An ink composition including an azo-based colorant and an ink set using the same. More particularly, an ink composition which uses a lithium salt and a derivative including hydroxynaphthalene of a chromophore as colorants, and includes etriol and an acetylene glycol-based compound, and an ink set using the same.

Abstract: An inkjet printing method including jetting an inkjet ink composition before and/or after a solution containing a Grignard reagent is applied to a printing medium, so that bleeding between colors of the printed image is minimized by increasing the adhesion between a colorant and a paper, and water resistance and rubbing resistance at dry and wet state for the printed image are enhanced to provide superior colorfastness.

Abstract: An ink composition including a colorant, a cyclic amide compound, a cyclic dicarbonyl compound, and water, an ink cartridge including the same, and an inkjet recording apparatus including the same. The ink composition maintains high solubility and stability of a colorant, even when used in small amounts, thereby enhancing not only a storage stability but also a fusing property of the ink composition on a print medium, and thus reinfroces a rubbing resistance of the ink composition on the print medium. The ink composition is easily dried on the print medium, and thus bleeding between colors is minimized, thereby improving printed image quality because little or solvent having a high boiling point is used in the ink composition.

Abstract: A polymeric dispersant having an affinity with a supercritical fluid is provided, in which a substituent having an affinity with a supercritical fluid is attached to the terminal end of a block copolymer. The polymeric dispersant can disperse a dispersoid to particulate size by lowering surface tension between the dispersoid and the supercritical fluid to promote diffusion of the supercritical fluid into the dispersoid.