Abstract: A water base ink for ink-jet recording is provided, which makes it possible to secure a high recording quality with a sharp image area edge by avoiding any blurring even when recording is performed on regular paper and which has satisfactory purge restoration performance. Therefore, no bubble remains in an ink flow passage, and no discharge failure is caused. Further, the discharge operation never becomes unstable. In the water base ink for ink-jet recording, the surface tension is not less than 40 mN/m, and the amount of dissolved oxygen is not more than 4 mg/L.

Abstract: According embodiments of the present disclosure, a water-based ink set for ink-jet recording is provided. The ink set may contain a black ink, a cyan ink, a magenta ink and a yellow ink. Each ink may contain a polyoxyethylene alkyl ether sulfonate.

Abstract: An ink set for ink-jet recording is characterized in that, when a patch of each of an yellow dye ink, a magenta dye ink, a cyan dye ink and a black dye ink is subjected to an ozone resistance test, the OD value reduction ratios of the patches upon the ozone resistance test are such that the order of the OD value reduction ratios of the yellow, magenta and cyan components in the black dye ink patch is the reverse of the order of the OD value reduction ratios of the yellow component of the yellow dye ink patch, the magenta component of the magenta dye ink patch and the cyan component of the cyan dye ink patch.

Abstract: In one embodiment, the disclosure relates to an ink-jet head including an ink chamber, a pressure chamber in communication with the ink chamber, a nozzle for ejecting an ink in communication with the pressure chamber, a piezoelectric actuator for applying an ejection pressure to an ink in the pressure chamber, and an ink passage extending from a boundary of the ink chamber to a tip of the nozzle. The tip of the nozzle has an aperture diameter of from about 15 to about 25 ?m, and the ink passage is configured such that when an ink having a viscosity of from about 2.5 to about 3 mPa·s is passed therethrough, a passage resistance value of the ink passage is from about 50 to about 100 kPa·s/mm3. Another embodiment of the disclosure relates to an ink-jet recording device containing such an ink-jet head.

Abstract: A black dye ink for ink-jet recording includes a black dye, a color dye for toning, a water-soluble organic solvent and water. The black dye ink, in a solid-printed portion printed on glossy paper with the black dye ink and having an average optical density of about 0.9 or more and about 1.1 or less, satisfies simultaneously the following inequalities (1) and (2). ODimax(0)?ODimin(0)?about 0.20??(1) ODimax(1)?ODimin(1)?about 0.20??(2) In inequalities (1) and (2), ODimax(0) and ODimin(0) are a maximum optical density and a minimum optical density, respectively, of optical densities of yellow, magenta and cyan color components, respectively; and ODimax(1) and ODimin(1) are a maximum optical density and a minimum optical density, respectively, of optical densities of the yellow, magenta and cyan color components, respectively, after a predetermined ozone resistance test is performed on the solid-printed portion printed with the black dye ink.

Abstract: An ink for ink-jet recording is provided, which makes it possible to obtain vivid recorded matters by satisfying both of the prevention of the feathering and the prevention of the bleeding even when the recording is performed on regular paper. The ink for ink-jet recording contains a self-dispersing type microparticulate coloring agent, a surfactant, and water. When the surface tension is plotted in the vertical axis, and the concentration of the surfactant is plotted in the horizontal axis, then the correlation between the surface tension and the concentration of the surfactant can be represented by a correlation curve which has one inflection point and which has two local maximum points of curvature on both sides of the inflection point one by one. Further, the ink for ink-jet recording contains the surfactant at a concentration which is higher than a concentration corresponding to the local maximum point of the curvature on the low concentration side.

Abstract: An ink for ink-jet recording contains a copper phthalocyanine pigment as a colorant, and a benzotriazole compound. The ink further contains a metallic phthalocyanine compound having one or more counter ions, wherein about 2 mol % to about 20 mol % of the counter ions is ammonium ion and/or organic ammonium ion.

Abstract: An ink set for ink-jet recording is characterized in that, when a patch of each of an yellow dye ink, a magenta dye ink, a cyan dye ink and a black dye ink is subjected to an ozone resistance test, the OD value reduction ratios of the patches upon the ozone resistance test are such that the order of the OD value reduction ratios of the yellow, magenta and cyan components in the black dye ink patch is the reverse of the order of the OD value reduction ratios of the yellow component of the yellow dye ink patch, the magenta component of the magenta dye ink patch and the cyan component of the cyan dye ink patch.

Abstract: A multifunction printer includes a scanner; a still image data-extracting section which extracts a plurality of still image data from inputted movie image data; a memory which stores a correlation between the extracted still image data and time positions thereof in the movie image data; a printing head which prints, on a first printing medium, a plurality of thumbnail images corresponding to the extracted still image data and the time positions; and a selected image-extracting section which specifies the time position in the movie image data corresponding to a selection mark marked by a user when the first printing medium is read by the scanner after the selection mark is marked by the user to the first printing medium and which extracts a still image data corresponding to the identified time position based on the correlation stored in the memory.

Abstract: A multifunction printer includes a scanner; a memory which stores a plurality of still image data; a printing head which prints, on a first printing medium, thumbnail images corresponding to the plurality of the still image data; an image data-extracting section which extracts a base image data and a correction image data when the first printing medium is read by the scanner after the predetermined base image selection mark has been marked by a user to one of the plurality of thumbnail images printed on the first printing medium and the predetermined correction position mark has been marked to a partial area of the thumbnail image and which cuts out, from the correction image data, correction data corresponding to the area marked with the correction position mark, and an image-combining section which combines the base image data with the correction data to generate combined image data.

Abstract: An ink set for ink-jet recording includes a dye yellow ink, a dye magenta ink, a dye cyan ink, and a dye black ink, wherein regarding a reduction rate in OD value between before and after a predetermined lightfastness test of each patch in the case where a patch of each ink is subjected to the lightfastness test, the order of levels of reduction rates in OD values of a yellow component, a magenta component, and a cyan component in a dye black ink patch is reverse to the order of levels of reduction rates in OD values of a yellow component in the dye yellow ink patch, a magenta component in the dye magenta ink patch, and a cyan component in the dye cyan ink patch.

Abstract: A cyan ink for ink-jet recording contains a coloring agent, water and a water soluble organic solvent. Different types of dyes are employed as the coloring agent. In particular, a dye represented by the general formula (1) is used together with at least one dye selected from the group consisting of a dye represented by the general formula (2), a dye represented by the general formula (3) and C. I. Direct Blue 86. In the formulas, Pc(Cu) is a copper phthalocyanine nucleus.

Abstract: A black dye ink for ink-jet recording containing a black dye, a color dye for toning, a water-soluble organic solvent and water, satisfies the following inequalities (1) and (2) simultaneously: ODimax(0)?ODimin(0)?0.15, and ??(1) ODimax(1)?ODimin(1)?0.15, ??(2) where ODimax(0) and ODimin(0) are maximum and minimum optical densities, respectively, of ODiy(0), ODim(0) and ODic(0) which are the optical densities of Y, M and C color components, respectively, of a solid black printed portion printed on glossy paper with the black dye ink and having an average optical density of about 0.9 or more and about 1.1 or less; and ODimax(1) and ODimin(1) are maximum and minimum optical densities, respectively, of ODiy(1), ODim(1) and ODic(1) which are the optical densities of the Y, M and C color components, respectively, after a predetermined light fastness test is performed on the solid black printed portion.

Abstract: An ink for ink-jet recording contains a copper phthalocyanine pigment as a colorant, and a thiazole compound. The ink further contains a metallic phthalocyanine compound having one or more counter ions, wherein about 2 mol % to about 20 mol % of the counter ions is ammonium ion and/or organic ammonium ion.

Abstract: A water-based ink for ink-jet recording contains water, a water-soluble organic solvent, a coloring agent and a crown ether. Even when the water-based ink is employed in the ink passage of an ink-jet recording apparatus and comes into contact with rubber members employed in the ink passage, the occurrence of precipitation is prevented.

Abstract: A water base ink set for ink-jet recording includes a black ink containing water, a black pigment and a water-soluble organic solvent and a color ink containing water, a dye, and a water-soluble organic solvent. The black pigment is a negatively-chargeable and self-dispersible pigment. The dye has a fluorescein structure. The color ink further contains an alkylamine ethylene oxide adduct. The water-soluble organic solvent contained in the black ink is same as that contained in the color ink. With the ink set, not only the bleeding hardly occurs but also satisfactory discharge stability is obtained even when an ink-jet recording is performed on a regular paper.

Abstract: An ink for ink-jet recording contains a copper phthalocyanine pigment as a colorant, and a thiazole compound. The ink further contains a metallic phthalocyanine compound having one or more counter ions, wherein about 2 mol % to about 20 mol % of the counter ions is ammonium ion and/or organic ammonium ion.

Abstract: An ink for ink-jet recording contains a copper phthalocyanine pigment as a colorant, and a benzotriazole compound. The ink further contains a metallic phthalocyanine compound having one or more counter ions, wherein about 2 mol % to about 20 mol % of the counter ions is ammonium ion and/or organic ammonium ion.

Abstract: A water base ink set for ink-jet recording includes a black ink containing a negatively charged self-dispersing black pigment and a water-soluble polyvalent alcohol alkyl ether; and a yellow ink containing a water-soluble anionic yellow dye in which a number of counter ion or ions per one molecule is not more than 3, a surfactant based on amine represented by the following general formula (1), and a water-soluble polyvalent alcohol alkyl ether; R—N—(CH2CH2O)xH(CH2CH2O)yH??(1) wherein R represents an alkyl group or an alkenyl group having a number of carbons of 8 to 18, and x+y is 5 to 15. Accordingly, the water ink set in which no bleeding or no coagulation of the pigment occur is provided.

Abstract: An ink set for ink-jet recording comprises a pigment ink and a dye ink containing a pigment and a dye as coloring agent, respectively. The pigment ink contains water, a water-soluble organic solvent, and a negatively charged pigment wherein potassium ion and sodium ion have a total ion concentration of not more than 200 ppm, and divalent or multivalent metal ion or ions have a total ion concentration of not more than 10 ppm. The dye ink contains water, a water-soluble organic solvent, and a dye associated with a counter ion of lithium ion wherein potassium ion and sodium ion have a total ion concentration of not more than 400 ppm, and divalent or multivalent metal ion or ions have a total ion concentration of not more than 10 ppm. In the ink set, the pigment and dye inks can be used in combination without complicating a maintenance system.