64 results about "Planographic printing" patented technology

A positive-working lithographic printing plate precursor including a support and an image-recording layer formed on the support and consisting of a positive-working photosensitive resin composition, in which the positive-working photosensitive resin composition contains a compound having at least one electron-withdrawing group and at least one phenolic hydroxyl group in one molecule, an alkali-soluble resin, and an infrared absorber, and the electron-withdrawing group excludes a sulfonyl group; and a method of preparing a lithographic printing plate using the positive-working lithographic printing plate precursor.

A method, apparatus and computer program for repairing defects in lithographic masks, in particular EUV masks, are disclosed. The method for repairing defects in lithographic masks, in particular EUV masks, comprises the steps of: (a.) performing a first repair step on the defect at a first repair dose, causing the defect to change from an initial topography to a first defect topography; (b.) determining the effect of the first repair step on the topography of the defect; (c.) determining a second defect topography to be achieved at the defect for a second repair step to be performed on the defect; (d.) determining a second repair dose for the second repair step, the determination being based at least in part on the determined effect of the first repair step on the topography of the defect and the second defect topography. Furthermore, the method can comprise the step of (e.) performing the second repair step at the second repair dose.

A negative working lithographic printing plate precursor has a negative working infrared radiation sensitive image recording layer having a) two or more free radical polymerizable components; b) an initiator composition capable of generating free radicals; and c) one or more infrared radiation absorbing cyanine dyes. A) the two or more radically polymerizable components comprise a combination of a urethane (meth) acrylate and a polyester (meth) acrylate together making up 75-100% by weight of all the radically polymerizable components. The weight ratio of the urethane (meth) acrylate to the polyester (meth) acrylate is from 90: 10 to 35: 65. The urethane (meth) acrylate comprises one or more urethane linkages and at least 4 acrylate groups or methacrylate groups. The one or more polyester (meth) acrylates each do not contain a urethane bond and are represented by the following structure (I). These precursors are less sensitive to ambient ozone and can be imaged by infrared radiation and developed on-press during lithographic printing.

A system comprising a memory and at least one processing device operatively coupled to the memory to perform operations comprising initiating a digital lithography process to pattern a substrate using a digital lithography system, controlling an area ratio in a first direction with respect to a first pair of adjacent exposure cells of the digital lithography system, and controlling a dose ratio in a second direction perpendicular to the first direction with respect to a second pair of adjacent exposure cells of the digital lithography system.

In the present invention, there are provided an on-press development type lithographic printing plate precursor including an image-recording layer on a support, in which the image-recording layer contains a color-forming compound having a group that cleaves by infrared exposure, a polymerization initiator, a polymerizable compound, and a hydrogen-donating compound, and the hydrogen-donating compound is a compound different from the polymerization initiator, the polymerizable compound, the color-forming compound, and an acid-cleavable compound and is a compound having at least one group selected from the group consisting of —OH, —NH—, —SO2—NH—, —SO2—OH, —CO—NH—, and —CO—OH in a molecule and having a molecular weight of less than 3,000, and a method of preparing a printing plate.

The present invention addresses the problem of providing a positive lithographic printing plate precursor and a method for producing a lithographic printing plate, said positive lithographic printing plate precursor having good development discrimination and having good brush resistance and image portion scratch resistance. The present invention provides a positive lithographic printing plate precursor and a method for making a lithographic printing plate using the positive lithographic printing plate precursor. The positive lithographic printing plate precursor comprises: a support; and an image recording layer formed from a positive photosensitive resin composition on the support. The positive photosensitive resin composition contains: a compound having at least one electron withdrawing group and at least one phenolic hydroxyl group in one molecule; an alkali soluble resin; and an infrared absorbent, wherein the electron withdrawing group does not include a sulfonyl group.

The present application belongs to the technical field of lithographic printing, and particularly relates to a tap water offset printing water quality stabilizer and a preparation method and use method thereof. The tap water offset printing water quality stabilizer comprises the following components in mass percentage: a buffer system 5-17%, a microbial bacteria liquid 1-10%, a printing plate protective agent 1-5%, a microbial maintenance system 5-20%, a clean plate enhancer 3-30%, a defoaming agent 0.5-5%, and the balance comprising water. The tap water offset printing water quality stabilizer prepared by the present application solves the problems that the dampening water is difficult to be standardized due to different standards of tap water hardness, pH, water quality and total solid content in different places, and that paper dust, paper fluff and grease gradually accumulate in the dampening water in the printing production process, resulting in increased waste water and decreased printing quality.

Provided are an on-press development type lithographic printing plate precursor having a support and an image-recording layer on the support in which the image-recording layer contains a coloring compound capable of having a coloring reaction with a decomposition product generated by exposure of the image-recording layer, and an on-press development type lithographic printing plate precursor having a support and an image-recording layer on the support in which the image-recording layer contains a compound represented by Formula 1C or Formula 2C and an electron-donating polymerization initiator. In Formula 1C and Formula 2C, R1C to R4C each independently represent a monovalent organic group, L1C and L2C each independently represent a divalent organic group, AC represents OH or NR5CR6C, and R5C and R6C each independently represent a monovalent organic group

The present invention relates to an on-press developing lithographic printing plate precursor, a method for producing a lithographic printing plate using the on-press developing lithographic printing plate precursor, and a lithographic printing method, the on-press developing lithographic printing plate precursor having a support and an image recording layer on the support, the image recording layer contains a polymerizable compound and polymer particles, the median diameter of the polymer particles is 50-120 nm, the content of the polymer particles is 42-90 mass% relative to the total mass of the image recording layer, and after osmium dyeing treatment is performed on the thickness-direction cross section of the lithographic printing plate precursor, the thickness-direction cross section of the lithographic printing plate precursor is greater than the thickness-direction cross section of the lithographic printing plate precursor, and the thickness-direction cross section of the lithographic printing plate precursor is greater than the thickness-direction cross section of the lithographic printing plate precursor. In a cross-sectional image obtained by binarizing a cross-sectional image obtained by scanning electron microscope observation into a dyed section and a non-dyed section, the standard deviation of the area ratio of the non-dyed section is less than 6.

The present invention provides an on-press development type lithographic printing plate precursor and a method for manufacturing a printing plate, the on-press development type lithographic printing plate precursor having an image recording layer on a support, the image recording layer contains a chromophoric compound having a group that cleaves by infrared exposure, a polymerization initiator, a polymerizable compound, and a hydrogen-donating compound, and the hydrogen-donating compound is a compound different from the polymerization initiator, the polymerizable compound, the chromophoric compound, and the acid-cleaving compound. And a compound having a molecular weight of less than 3,000 and having at least one group selected from the group consisting of-OH,-NH-,-SO2-NH-,-SO2-OH,-CO-NH-, and-CO-OH in the molecule.

The invention relates to an ink formula for scraping silver and a printing method of the scraping silver. The formula comprises bottoming oil and a silver scraping solution, the priming oil comprises resin, an initiator, a monomer and a filler; the scraping silver solution comprises resin, a monomer, an initiator, a filler and silver paste; a high-speed lithographic printing machine is used for multiple times of bottom oil printing on paper, then scraping silver solution printing is carried out, and finally scraping silver is formed. According to the printing ink formula and a high-speed flat plate printing machine, a printed sheet is subjected to multiple times of bottom oil printing, gaps in the surface of the paper are filled, adhesion and covering of the scraping silver printing ink are enhanced, then scraping silver printing is carried out, high-speed flat plate scraping silver printing is achieved, and the printing efficiency is improved. And the printing efficiency is high, mass production can be realized, and the positioning gauge is accurate, uniform and flat.

The present invention aims at obtaining a seamless planographic printing plate precursor and a seamless planographic printing plate, which are excellent in image reproducibility necessary for obtaining a high-fineness seamless planographic printed matter. Further, it aims at obtaining a seamless planographic printing plate precursor and a seamless planographic printing plate, which are easy to regenerate the cylindrical support. The present invention is a seamless planographic printing plate precursor having, in order on the outer circumferential surface of a cylindrical support, a respective continuous easy-peeling primer layer and an ink-repellent layer.

The present application provides a support for a lithographic printing plate, a lithographic printing plate precursor, and a method for producing a lithographic printing plate precursor, the support for a lithographic printing plate being capable of obtaining a lithographic printing plate precursor excellent in scratch resistance by being combined with an image recording layer. The support for a lithographic printing plate of the present application is a support for a lithographic printing plate including an aluminum plate and an anodized film of aluminum provided on the aluminum plate, a plurality of convex portions being present on the surface on the side of the anodized film of the support for a lithographic printing plate, the average value of the equivalent circle diameters of the cut surfaces of the convex portions in the positions higher than the position of the average height of the convex portions by 0.5 μm or more being 3.0 to 10.0 μm, and the density of the convex portions having a height higher than the position of the average height of the convex portions by 0.5 μm or more being 3000 to 9000 pieces / mm 2 .

The invention provides an ink composition including (A) a polymerization initiator and (B) a (meth)acrylic acid ester having an alicyclic group as a substituent or amide having an alicyclic group as a substituent. The ink composition preferably further contains (D) a colorant and (E) a sensitizing dye. The ink composition is used for ink jet recording.

An on-press developing lithographic printing original plate having a support body and an image recording layer on the support body, the image recording layer containing (1) or (2). (1) A borate compound represented by formula (1) and an electron-accepting polymerization initiator. (2) A borate compound represented by formula (1a). In formula (1) and formula (1a), R1, R2, R3, and R4 each independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group; r1, R2, R3 and R4 may each independently have a ring structure. In this connection, at least one of R1, R2, R3, and R4 is different from the others. M + represents a cation. Ma + represents an iodonium cation.

The present invention provides a lithographic printing plate having a support and an image recording layer formed on the support. The image recording layer contains an infrared absorber, a polymerization initiator and a polymer A, wherein the weight-average molecular weight of polymer A is greater than 15,000 and less than 150,000, and the olefin unsaturated bond value of polymer A is 3.0 mmol / g or more.

The present application provides an on-press development type lithographic printing plate precursor having a support and an image recording layer on the support, the image recording layer containing a color developing compound capable of undergoing a color developing reaction with a decomposition product generated by exposure of the image recording layer, an on-press development type lithographic printing plate precursor having a support and an image recording layer on the support, the image recording layer containing a compound represented by Formula 1C or Formula 2C and an electron-donating polymerization initiator, and a method for producing a lithographic printing plate or a lithographic printing method using the on-press development type lithographic printing plate precursor. In Formula 1C and Formula 2C, R 1C ~R 4C each independently represents a monovalent organic group, L 1C and L 2C each independently represents a divalent organic group, A C represents OH or NR 5C R 6C , R 5C and R 6C each independently represents a monovalent organic group.

To provide a technique advantageous in improving the robustness against noise so as to measure the position of a measurement target with high accuracy.SOLUTION: A measurement apparatus that measures position information of a measurement target is provided. The apparatus includes a scope configured to generate an image by capturing an image of the measurement target, and a processor configured to obtain position information of the measurement target based on the image. The processor is configured to generate a plurality of image components using a statistical technique from a plurality of images generated by the scope, output the plurality of generated image components, perform processing based on the plurality of image components, and determine the position information based on a result of the processing.SELECTED DRAWING: Figure 11

The present invention provides a lithographic printing ink composition that emulsifies quickly and does not experience a decrease in torque after emulsification. [Solution] A lithographic printing ink composition comprising a pigment, calcium carbonate, binder resin, petroleum-based solvent, and vegetable oil, characterized in that it is (1) to (3) as described below. (1) Contains polypropylene polyol, and the polypropylene polyol content in the lithographic printing ink composition is 0.01 to 5.0 parts by weight. (2) The pigment contains a disazo-based yellow pigment, and the pigment content in the lithographic printing ink composition is 5 to 15% by mass. (3) The calcium carbonate has a primary particle size of 0.02 to 0.10 μm, and its surface is treated with rosin acid and / or resin acid / fatty acid, and the content of the calcium carbonate in the lithographic printing ink composition is 1 to 30% by mass.

IR-sensitive lithographic printing plate precursors provide stable print-out images using a unique IR radiation-sensitive composition in the IR radiation-sensitive image-recording layer. The IR radiation-sensitive composition comprises: (1) a free radical initiator composition comprising a borate compound; (2) a free radical polymerizable composition; (3) an acid-sensitive color change compound represented by Formula (I) identified herein; (4) an infrared absorber material; and (5) a color change compound of Formula (III) or Formula (IV) identified herein. After IR imaging, the exposed precursors exhibit desirable print-out images, especially in the 600-700 nm region of the electromagnetic spectrum, and especially for viewing using electronic sensing devices. The imaged precursors can be developed off-press or on-press.

This invention provides an information reading method capable of accurately reading printing plate identification information added to an on-press development type lithographic printing plate master configured to enhance the visibility of the exposed portion, as well as a reading system and a reading device attachment that can be used therefor. [Solution] An information reading method comprising: a first step of preparing an on-press development type lithographic printing plate master having plate identification information formed with water-soluble ink on one side of an image forming layer having an exposed area containing a colorant having an absorption maximum in the visible range and an unexposed area, wherein the ΔL between the exposed area and the unexposed area is 10 or more; a second step of irradiating the on-press development type lithographic printing plate master with light; a third step of imaging the on-press development type lithographic printing plate master irradiated with light in the second step using an image sensor; and a fourth step of acquiring the plate identification information based on the image data obtained by imaging in the third step, wherein the light has an intensity in a first range that includes the wavelength of the absorption maximum and is narrower than the visible range, and the intensity in ranges other than the first range is smaller than the intensity in ranges other than the first range.

Various embodiments herein relate to methods of using maskless lithography to form layers. In these embodiments, the method implements a dose-varying staircase that divides a geometry into overlay portions. The overlay portions can include different doses for each portion to achieve control of the taper. The taper can be achieved by operating the geometric "mask data" into different dose overlay portions controlled by a pixel blending (PB) exposure technique. To perform the methods described herein, a maskless lithography tool is used. The maskless lithography tool includes a controller that performs software-based "mask data" operations. Because the method is performed masklessly by software without the additional mask cost and manufacturing time, there is greater flexibility to adjust the taper angle and / or photoresist thickness residuals of multi-tone / grey-tone mask features, which is an advantage over traditional lithography methods that use masks.

The present application relates to the technical field of lithographic printing, and specifically relates to a printing device of a lithographic printing machine, which comprises a printing module, one side of the printing module is provided with a cleaning module one and a cleaning module two, the printing module comprises a fixed shell, a plate cylinder is rotationally connected to the top of the inner side of the fixed shell, a plurality of inking rollers are rotationally connected to the top of the plate cylinder and are arranged on the inner side of the fixed shell, and a plurality of water moistening rollers are rotationally connected to one side of the plate cylinder and are arranged on the inner side of the fixed shell. In the present application, a connecting plate is slidably connected to the inner side of the adjusting plate, the inking roller can be moved downward out of the adjusting plate by a hydraulic rod, the rubber roller can be moved downward between the cleaning module one and the cleaning module two and separated from the plate cylinder, the cleaning module one and the cleaning module two can be moved along the rubber roller to clean the surface of the rubber roller, the rubber roller does not need to be removed, the rubber roller can be automatically cleaned, and the cleaning is more convenient.

The utility model discloses a kind of adsorption type lithographic press pull gauge components, including pull gauge seat, the upper surface middle position sliding connection of pull gauge seat has moving seat, and the upper surface fixed mounting of moving seat has lower pull paperboard, the upper surface of lower pull paperboard is provided with recess, recess is internally fixedly installed with suction disc, the upper of suction disc is provided with several evenly distributed suction holes, and the lower surface fixedly connected of suction disc has air pipe joint, the upper surface one end of pull gauge seat is fixedly installed with paper-pressing fixed seat, the upper surface fixed mounting of paper-pressing fixed seat has fixed plate, and the one end fixed mounting of fixed plate away from paper-pressing fixed seat has paper-pressing fixed block, and the outer surface of paper-pressing fixed block is fixedly installed with upper paper-pressing board by bolt, the utility model can effectively paper is adsorbed on lower pull paperboard, so that paper can be closely attached with lower pull paperboard, guarantee the complete paving effect of paper, paper can effectively avoid bulging phenomenon due to airflow.

The IR-sensitive lithographic printing plate precursor uses a unique IR-sensitive image recording layer to provide stable printing. This IR-sensitive layer comprises: component (1) a free radical initiator composition; component (2) a free radical polymerizable composition; and component (3) a color-changing compound of structure (I) having an indene structure in a conjugated chain between aromatic end groups. Specific groups, such as halogen groups, are directly or indirectly connected to this indene structure. The IR-sensitive image recording composition and the IR-sensitive image recording layer also contain one or more borate ions. After infrared imaging, these precursors exhibit desirable fresh or initial printing and printing after dark storage. The precursor is machine-developable.

The present invention provides a lithographic printing plate support with which a lithographic printing plate having excellent scratch resistance can be obtained by combining with an image recording layer, a lithographic printing plate, and a method for producing a lithographic printing plate. This lithographic printing plate support comprises an aluminum plate and an aluminum anodized film disposed on the aluminum plate. The surface of the lithographic printing plate support on the anodized film side has a plurality of protrusions, the average value of an equivalent circular diameter of a cut surface of a protrusion at a position 0.5 μm higher than the position of the average height of the protrusions is 3.0−10.0 μm, and the density of protrusions having a height of 0.5 μm or more above the position of the average height of the protrusions is 3000−9000 per square millimeter.

The application discloses a full-automatic lithographic printing machine, which clamps printing cylinder paper rolls between printing paper cylinder clamping assemblies, can clamp printing cylinder paper rolls with different diameters through the printing paper cylinder clamping assemblies, can clamp printing cylinder paper rolls with different lengths through starting horizontal sliding groove assemblies, realizes automatic adaptation to printing cylinder paper rolls with different sizes, automatically guides printing paper onto a workbench through a guide-in roller assembly, then moves a movable gantry below a first gantry end support to the lower side of the first gantry end support, clamps one end of the printing paper through starting a printing paper clamping and cutting assembly, clamps and tightens the other end of the printing paper through a printing paper tensioning mechanism at the bottom of the first gantry end support, adjusts a printing head through starting a gantry adjusting sliding groove assembly and a horizontal adjusting assembly, performs printing through the printing head, and realizes the function of guiding out the printing paper through starting the printing paper tensioning mechanism again after the printing is completed.

An LED-curable offset printing ink comprises: 25-85% of one or more acrylates, wherein at least one acrylate is a pentaacrylate or a hexaacrylate; 0-20% of one or more photoinitiators; 5-60% of one or more rosin-modified polyester resins, wherein the rosin-modified polyester resins have a molecular weight of 5,000 to 35,000 Daltons; 0.2-5% of one or more aluminum additives; 0.1-5% of one or more polymerization stabilizers; and 0-50% of colorant.