Abstract: A lithographic printing plate precursor includes a support and an ink-receptive layer containing a microcapsule.

Abstract: A lithographic printing plate precursor on which an image is adapted to be formed with an inkjet ink by inkjet recording, which includes a support and an ink receptive layer containing a luminescent substance.

Abstract: The present invention provides a method of producing a planographic printing plate, including ejecting a photo-polymerizable ink composition containing at least one polymerization-initiating substance having a molar extinction coefficient of 1,000 M?1cm?1 or more in a wavelength range of 400 nm to 700 nm on a support, and polymerizing and hardening the ink deposited on the support by irradiation of the ink with light from a light source having an output of 1,000 W or less, and a planographic printing plate obtained by the method.

Abstract: A negative-type image recording material comprising a support having a rear surface and an image recording layer disposed on the support, the image recording layer having a front surface and including (A) a radical-generating agent and (B) a radically polymerizable compound, wherein a static friction coefficient between the front surface and the rear surface is less than 0.50. In order to achieve such a specified static friction coefficient, it is preferable that the image recording layer contains (D) a compound represented by the following formula (1): R1—X ??(1) wherein R1 represents an optionally substituted hydrocarbon group having a total of 8 to 32 carbon atoms, and X represents CO—Y—R2, NH—CO—NH—R2, SO2—Y—R2, or Y—R3 in which Y represents O, S, NR4 or a single bond.

Abstract: The invention provides a negative image recording material comprising: a support and an image recording layer disposed on the support, the image recording layer comprising an amide-acid compound containing a carboxyl group and an amide group expressed by the following General Formula (1): wherein L11 represents a hydrogen atom or a hydrocarbon group having 30 or fewer carbon atoms which may have a substituent; and wherein the amide-acid compound is insolubilized by a thermal ring-closure reaction between the carboxyl group and the amide group. The invention further provides a negative image recording material comprising a support, an image recording layer disposed on the support, the image recording layer containing a polymerization initiator and a polymerizable compound, and an overcoat layer disposed on the image recording layer, the overcoat layer containing the amide-acid compound expressed by the General Formula (1).

Abstract: In electrostatic inkjet recording in which an ink droplet is ejected by acting electrostatic force on ink that contains colorant particles, the electric conductivity of the colorant particles in the ink is saturated. Thus, variations in ink dot diameter caused by the ejection delay and a decrease in frequency responsivity are avoided, so that high-quality image recording with good frequency responsivity can be realized.

Abstract: An inkjet recording method comprising ejecting an ink composition comprising a dispersion medium and charged particles containing at least a colorant by utilizing an electrostatic field, wherein the method comprises preparing as the ink composition, an initial feeding ink composition and a replenishing ink composition in which solid content concentration is controlled higher than solid content concentration of the initial feeding ink composition, and replenishing the replenishing ink composition in order to compensate decrease in concentration of the charged particles due to ejection of the initial feeding ink composition.

Abstract: When a drive frequency for an electrode used to cause an electrostatic force to act on an ink composition is assigned A, and a division frequency for a thread is assigned B, a relationship of A?5 kHz and B/A?5 is met, and a division frequency for the thread is reduced for a time period required to apply a pulse voltage to the electrode in order to eject the ink composition. As a result, it is possible to provide an electrostatic ink jet recording method with which excellent gradation controllability and controllability for dot diameters in a shadow area can be realized.

Abstract: A heat mode type negative image recording material is provided which comprises (A) a polymer compound that is insoluble in water but is soluble in an alkali aqueous solution and has at least one of groups represented by general formulae (1) to (3) on a side chain; (B) a photothermal conversion agent; and (C) an onium salt compound forming radicals by heat mode exposure with light that is capable of being absorbed by said photothermal conversion agent (B), said heat mode type negative image recording material being capable of recording an image by heat mode exposure. The general formulae are defined in the specification.

Abstract: A planographic printing plate precursor comprising: a substrate; a photosensitive layer disposed on the substrate, the photosensitive layer including a light-to-heat conversion agent and a compound, which is at least one of crosslinkable and polymerizable, with solubility of the photosensitive layer in an alkali developing solution being decreased by the effect of at least one of light and heat; and an overcoat layer including a polymer, which is hydrophobic and soluble in an aqueous alkali solution.

Abstract: An ink composition comprising: a dispersion medium; and coloring material particles comprising: primary particles comprising at least a coloring material and a first polymer; and secondary particles not comprising a coloring material, and comprising at least a second polymer, wherein the secondary particles are deposited on surfaces of the primary particles, and an ink jet recording method.

Abstract: A process for producing an ink composition containing a dispersing medium and particles containing a colorant and a polymer, the process comprising: wet dispersing the colorant and the polymer in the dispersing medium at a temperature of lower than 10° C.

Abstract: A developer composition for developing a lithographic printing plate having a negative recording layer on which an image is recorded via an infrared laser, the composition containing a nonionic surfactant, and a process for forming an image on a lithographic printing plate. The process comprises the steps of imagewise exposing a lithographic printing plate having a negative recording layer on which an image is recorded via an infrared ray and which contains an infrared ray absorbent, a radical generator and a radically polymerizable compound, and then developing the lithographic printing plate with the developer composition containing a nonionic surfactant.

Abstract: The present invention provides a planographic printing plate precursor comprising a photosensitive layer on a support, the photosensitive layer including an infrared absorbent, a radical polymerization initiator and a radical polymerizing compound, the photosensitive layer being recordable with irradiation with an infrared ray, and being at least one of soluble and dispersible in water.

Abstract: A method of manufacturing an ink composition is provided and includes the steps of dispersing a coloring material in a dispersion medium to provide a dispersion, and then adding an electric charge generator to the dispersion to form charged particles, in which heating treatment is carried out after the addition of an electric charge generator.

Abstract: A liquid ink composition is provided and contains: charged particles including at least a coloring material; (a) at least a compound selected from an organic acid and a metal salt thereof; and (b) at least a compound selected from a basic compound and an onium salt. An ink jet recording method is provided and has a step of ejecting the same liquid ink composition as ink droplets.

Abstract: The present invention provides a planographic printing plate precursor comprising a photosensitive layer on a support, the photosensitive layer including an infrared absorbent, a radical polymerization initiator and a radical polymerizing compound, the photosensitive layer being recordable with irradiation with an infrared ray, and being at least one of soluble and dispersible in water.

Abstract: A method for manufacturing particles containing a coloring material and a polymer, the method comprising: dispersing a mixture of the coloring material and the polymer with beads for dispersion, so as to form fine particles; and heating the fine particles after removing the beads for dispersion, so as to increase particle sizes of the fine particles. And particles containing a coloring material and a polymer, wherein a redispersibility of the particles in a dispersion medium is in a range of from 50 to 100%, and an ink composition comprising the particles.

Abstract: A negative type planographic printing plate in which recording can be performed directly from digital data of a computer or the like using an infrared laser. Sensitivity of the plate is high, ablation by a recording layer during recording is suppressed, a developing property is good, occurrence of a film residue does not occur, and image forming properties such as halftone dot reproducibility are excellent. The negative type planographic printing plate has on a supporting body, in the following order, a first layer that contains a polymer insoluble in water and soluble in an alkaline aqueous solution, and a second layer that contains a cross-linking or polymeric compound, which forms a covalent bond by action of light or heat and lowers solubility of the second layer in an alkaline developing liquid.

Abstract: A heat mode type negative image recording material is provided which comprises (A) a polymer compound that is insoluble in water but is soluble in an alkali aqueous solution and has at least one of groups represented by general formulae (1) to (3) on a side chain; (B) a photothermal conversion agent; and (C) an onium salt compound forming radicals by heat mode exposure with light that is capable of being absorbed by said photothermal conversion agent (B), said heat mode type negative image recording material being capable of recording an image by heat mode exposure. The general formulae are defined in the specification.