Abstract: Inkjet printing method having the following steps: ejecting an oily ink comprising particles to a printing medium with use of an electrostatic field according to image data signals to form an image directly on the printing medium; and fixing the image to obtain a printed matter, wherein a prevention of an aggregation and/or a precipitation of the particles is conducted at least during ink circulation, or an aggregate and/or a deposit of the particles formed at least due to a suspension of ink-flow is redispersed.

Abstract: An inkjet recording device and inkjet recording method capable of forming a high quality image with a simple structure. A transport belt position detection component detects a position of an end portion of a transport belt and outputs the detected position to a system control section. A recording medium position detection component detects a position of an end portion of a recording medium and outputs the detected position to the system control section. A position control component is capable of moving on the basis of instructions from the system control section for movement across a transport direction.

Abstract: A plate-making method comprising: forming an image directly on a plate material by an electrostatic ink jet method comprising ejecting an oil ink using electrostatic field based on signals of image data; and fixing said image to manufacture a printing plate, wherein said method uses: (1) an ink circulation line having the following members a, b and c: a. an ink jet ejection head, b. an ink transportation line comprising an ink feed line for feeding said oil ink to said ink jet ejection head and an ink recovery line for recovering said oil ink from said ink jet ejection head, and c.

Abstract: A printing process for preparing a printed matter comprising: forming an image on the surface of an image carrier by an ink jet method comprising ejecting an oil-based ink using electrostatic field based on signals of image data; and contact-transferring the image formed on the image carrier onto a printing medium to prepare a printed matter. Also disclosed is a printing apparatus suitable for the process.

Abstract: An on-press recording type lithographic printing method involving an ink jet process which comprises ejecting an oil-based ink onto a printing plate material mounted on the plate cylinder of a press utilizing an electrostatic field according to signals of image data, whereby an image is directly formed on the surface of said printing plate precursor, thereby preparing a printing plate which is then used as it is to effect lithographic printing, characterized in that when any abnormality occurs, the formation of image is suspended and/or the cause of abnormality is removed.

Abstract: An ink jet printing process comprising: forming an image directly on a printing medium by an electrostatic ink jet method comprising ejecting an oil ink using electrostatic field based on signals of image data; and preparing a printed matter by fixing said image, wherein said process uses: (1) an ink circulation line having the following members a, b and c: a. an ink jet ejection head, b. an ink transportation line comprising an ink feed line for feeding said oil ink to said ink jet ejection head and an ink recovery line for recovering said oil ink from said ink jet ejection head, and c.

Abstract: Inkjet printing method comprising: ejecting an oily ink comprising particles to a printing medium with use of an electrostatic field according to image data signals to form an image directly on the printing medium; and fixing the image to obtain a printed matter, wherein a prevention of an aggregation and/or a precipitation of the particles is conducted at least during ink circulation, or an aggregate and/or a deposit of the particles formed at least due to a suspension of ink-flow is redispersed.

Abstract: Disclosed is a plate-making method and a computer-to-cylinder type lithographic printing method, each of which comprises filtering an oil-based ink; forming an image directly on a plate material by an ink jet process comprising ejecting said filtered oil-based ink using electrostatic field based on signals of image data; and fixing said formed image to prepare a printing plate. Also disclosed are a plate-making apparatus and a computer-to-cylinder type lithographic printing method suitable for these methods, respectively.

Abstract: A method of lithographic printing is disclosed, which comprises forming an image based on signals of image data directly on printing plate precursor mounted on a plate cylinder of a printing press, thereby preparing a printing plate, and conducting lithographic printing, wherein the formation of image on the printing plate precursor is carried out by an ink jet recording method in which oil-based ink is ejected utilizing an electrostatic field.

Abstract: An ink jet printing process for forming an image directly on a printing medium by an electrostatic ink jet method of ejecting an oil ink using electrostatic field based on signals of image data and preparing a printed matter by fixing the image and an ink jet printing apparatus comprising image-forming means of forming an image directly on a printing medium based on signals of image data and image-fixing means of fixing the image formed by the image-forming means to obtain a printed matter, the image-forming means being an ink jet drawing device of ejecting an oil ink from an ejection head using electrostatic field.

Abstract: An ink jet plate-making method comprising: forming an image directly on a plate material by an electrostatic ink jet method comprising ejecting an oil ink using electrostatic field based on signals of image data; and fixing said image to manufacture a printing plate, wherein said process uses: an ink tank for storing said oil ink, an ink circulation line for stirring the oil ink stored in said ink tank, and an ink feed line for feeding said oil ink to an ink jet ejection head, branched from said ink circulation line, and wherein the ink is circulated to said ink circulation line and thereby stirring of the ink stored in said ink tank and feeding of the ink to said ink jet ejection head are simultaneously performed.

Abstract: A plate-making method for forming an image based on signals of image data directly on a printing plate precursor by an ink jet recording method in which oil-based ink is ejected utilizing an electrostatic field and fixing the image, thereby preparing a printing plate. A plate-making apparatus of the invention includes an image former for forming an image based on signals of image data directly on a printing plate precursor and an image fixer for fixing the image formed by the image-former to prepare a printing plate, wherein the image-former is an ink jet recording device which ejects oil-based ink utilizing an electrostatic field from an ejection head.

Abstract: A plate-making method comprising: forming an image directly on a plate material by an ink jet process of ejecting an oil ink using an electrostatic field based on signals of image data; and fixing the image to prepare a printing plate, wherein prevention of coagulation and/or precipitation of the oil ink particles is performed at least in a circulation of the oil ink, and an on-press drawing lithographic printing method comprising: attaching a plate material onto a plate cylinder of a press; forming an image directly on the plate material by an ink jet process of ejecting an oil ink from a recording head using an electrostatic field based on signals of image data to prepare a printing plate; and performing lithographic printing using the printing plate in that state, wherein prevention of coagulation and/or precipitation of the oil ink particles is performed at least in a circulation of the oil ink.

Abstract: A method of computer-to-cylinder lithographic printing, comprising: loading a plate material on a rotative plate cylinder of a lithographic printing apparatus; rotating the plate cylinder having loaded thereon the plate material; forming an image directly onto the plate material by an inkjet image-recording process which comprises ejecting an oil-based ink from a recording head having a plurality of ejecting channels, based on image data signals, utilizing an electrostatic field, to prepare a printing plate; subsequently performing lithographic printing with the thus prepared printing plate, wherein the recording head is driven so that every n'th channel thereof is actuated in a common phase, and wherein the plate cylinder is rotated to give a surface rotational speed V (mm/sec) of the plate material as represented by the following formula: V=25.4×(f×n)/N wherein N represents a recording resolution (dots/25.

Abstract: An ink jet printing process for forming an image directly on a printing medium by an electrostatic ink jet method of ejecting an oil ink using electrostatic field based on signals of image data and preparing a printed matter by fixing the image and an ink jet printing apparatus comprising image-forming means of forming an image directly on a printing medium based on signals of image data and image-fixing means of fixing the image formed by the image-forming means to obtain a printed matter, the image-forming means being an ink jet drawing device of ejecting an oil ink from an ejection head using electrostatic field.

Abstract: An ink composition for an electrostatic ink jet composed of a nonaqueous solvent having an electrical resistance of not lower than 109 &OHgr;·cm and a dielectric constant of not more than 3.5; a solid particulate material having an average particle diameter of from 0.1 to 3 &mgr;m dispersed in a nonaqueous solvent; and at least one fluorine-based surface active agent which is soluble in the nonaqueous solvent. The surface active agent is present in an amount from about 0.05 to 5% by weight based on the weight of the ink composition.

Abstract: A plate-making method comprising: forming an image directly on a plate material by an electrostatic ink jet method comprising ejecting an oil ink using electrostatic field based on signals of image data; and fixing said image to manufacture a printing plate, wherein said method uses: (1) an ink circulation line having the following members a, b and c: a. an ink jet ejection head, b. an ink transportation line comprising an ink feed line for feeding said oil ink to said ink jet ejection head and an ink recovery line for recovering said oil ink from said ink jet ejection head, and c.

Abstract: A method of computer-to-cylinder lithographic printing, comprising: loading a plate material on a rotative plate cylinder of a lithographic printing apparatus; rotating said plate cylinder having loaded thereon the plate material; forming an image directly onto the plate material by an inkjet image-recording process which comprises ejecting an oil-based ink from a recording head having a plurality of ejecting channels, based on image data signals, utilizing an electrostatic field, to prepare a printing plate; subsequently performing lithographic printing with the thus prepared printing plate, wherein said recording head is driven so that every n'th channel thereof is actuated in a common phase, and wherein said plate cylinder is rotated to give a surface rotational speed V (mm/sec) of the plate material as represented by the following formula:

Abstract: An ink jet plate-making method comprising: forming an image directly on a plate material by an electrostatic ink jet method comprising ejecting an oil ink using electrostatic field based on signals of image data; and fixing said image to manufacture a printing plate, wherein said process uses: an ink tank for storing said oil ink, an ink circulation line for stirring the oil ink stored in said ink tank, and an ink feed line for feeding said oil ink to an ink jet ejection head, branched from said ink circulation line, and wherein the ink is circulated to said ink circulation line and thereby stirring of the ink stored in said ink tank and feeding of the ink to said ink jet ejection head are simultaneously performed.

Abstract: An ink jet printing process for forming an image directly on a printing medium by an electrostatic ink jet method of ejecting an oil ink using electrostatic field based on signals of image data and preparing a printed matter by fixing the image and an ink jet printing apparatus comprising image-forming means of forming an image directly on a printing medium based on signals of image data and image-fixing means of fixing the image formed by the image-forming means to obtain a printed matter, the image-forming means being an ink jet drawing device of ejecting an oil ink from an ejection head using electrostatic field.