Abstract: A method of on-press developing a high-speed laser sensitive lithographic printing plate with ink and/or fountain solution is described. The printing member comprises on a substrate a photosensitive layer soluble or dispersible in ink and/or fountain solution and capable of hardening upon exposure to a laser. The plate is exposed with a laser and on-press developed with ink and/or fountain solution. At least a portion of the on-press development is performed with the plate under a yellow-red light or in substantial darkness.

Abstract: There is provided a lithographic printing plate substrate comprising (a) a base layer, (b) a layer of a first adhesive covering one side of the base layer except for at least two opposite edges thereof, and (c) an aluminum layer laminated onto the layer of first adhesive and said opposite edges of the base layer, the aluminum layer thereby being sealed with the base layer at said opposite edges of the base layer. There is also provided a method of manufacture thereof as well as a method of processing in view of recycling. Finally, there is provided a lithographic printing plate comprising the above substrate.

Abstract: A method of on-press developing a high-speed laser sensitive lithographic printing plate with ink and/or fountain solution is described. The printing member comprises on a substrate a photosensitive layer soluble or dispersible in ink and/or fountain solution and capable of hardening upon exposure to a laser. The plate is exposed with a laser and on-press developed with ink and/or fountain solution. At least a portion of the on-press development is performed with the plate under a yellow-red light or in substantial darkness, and at least a portion of the lithographic printing is performed under white light.

Abstract: An ink composition is provided that includes (A) an N-vinyllactam, (B) a polymerization initiator, and (C) a basic compound, the content of the N-vinyllactam (A) being at least 15 wt % of the total weight of the ink composition. There is also provided an inkjet recording method that includes (a1) a step of discharging the ink composition onto a recording medium, and (b1) a step of curing the ink composition by irradiating the discharged ink composition with actinic radiation. Furthermore, a printed material obtained using the ink composition is provided. Moreover, there is provided a process for producing a lithographic printing plate that includes (a2) a step of discharging the ink composition onto a hydrophilic support, and (b2) a step of curing the ink composition by irradiating the discharged ink composition with actinic radiation so as to form a hydrophobic image on the hydrophilic support by curing the ink composition.

Abstract: The lithographic printing plate support includes an aluminum plate and an anodized film formed on the aluminum plate and micropores extend in the anodized film in a depth direction from its surface opposite from the aluminum plate. Each of the micropores includes a large-diameter portion having a predetermined shape and a small-diameter portion having a predetermined shape. The lithographic printing plate support has excellent scratch resistance and is capable of obtaining a presensitized plate which exhibits excellent on-press developability and enables a lithographic printing plate formed therefrom to have a long press life, and excellent deinking ability in continued printing and after suspended printing.

Abstract: The present technology relates to a device and process for soft lithography by micro-contact printing using a flexible stamp to make a structured deposit of molecules on a substrate such as a glass plate intended for microscopic observation. It enables a simple and effective control of the application pressure of a stamp or a macro-stamp for soft lithography on the surface of a substrate and makes the automation of the soft lithography process easier by integrating the automatic stamp change into it. Micro-contact printing stamps of the invention preferably comprise a flexible stamp including a layer containing soft ferromagnetic particles. Micro-contact printing apparatuses of the invention preferably comprise a magnetic field generator capable of applying uniform pressure to contact a stamp against a substrate, and further are preferably capable of holding the stamp, contacting the stamp with an inking tank, and changing the stamp.

Abstract: A process for making a lithographic printing plate that includes in sequence an exposure step of imagewise exposing by means of an infrared laser a lithographic printing plate precursor that has provided above a support a positive-working recording layer including (Component A) a (meth)acrylonitrile-derived monomer unit- and styrene-derived monomer unit-containing copolymer, (Component B) a water-insoluble and alkali-soluble resin, and (Component C) an infrared absorbing agent and a development step of developing, using an aqueous alkali solution including a betaine-based surfactant or a nonionic surfactant, the aqueous alkali solution having a pH of 8.5 to 10.8, by removing an exposed area of the positive-working recording layer whose solubility in aqueous alkali solution has been increased by the exposure. There is also provided a lithographic printing plate made by the process for making a lithographic printing plate.

Abstract: A printing plate to form a precise pattern, a method for manufacturing the printing plate, and a method for fabricating an LCD device using the printing plate in which the printing plate includes a substrate having at least one trench and sidewall elements formed at an inner perimeter of the at least one trench.

Abstract: A lithographic printing plate precursor comprising: a support; and at least one layer comprising an image-recording layer, the image-recording layer comprising (A) an infrared absorber, (B) a polymerization initiator, (C) a polymerizable compound, and (D) a binder polymer, wherein the image recording layer is capable of being removed with at least one of a printing ink and a fountain solution, wherein at least one of said at least one layer comprises a copolymer having (a1) a unit comprising at least one ethylenically unsaturated bond, and (a2) a unit comprising at least one functional group interacting with a surface of the support. And a lithographic printing method in which the lithographic printing plate precursor is used. The copolymer preferably has a hydrophilic segment. The copolymer preferably is contained in an undercoat layer formed between the support and the image-recording layer.

Abstract: A photosensitive laminated original printing plate for letterpress printing that does not contaminate developers, being capable of suppressing a cost increase due to developer replacement and is of high quality; and a process for producing a letterpress printing plate using the photosensitive laminated original printing plate for letterpress printing.

Abstract: There is provided a lithographic printing plate precursor that enables image recording using a laser and that provides an excellent scumming resistance and an excellent developability while maintaining a satisfactory printing durability. Also provided are a platemaking method, and a novel polymerizable monomer. A lithographic printing plate precursor has a support, and an image recording layer disposed thereon and containing a radical polymerization initiator and a polymerizable monomer that has a sulfonamide group and at least two ethylenically unsaturated groups; a lithographic printing plate platemaking method uses this lithographic printing plate precursor; and a polymerizable monomer has a sulfonamide group and at least two ethylenically unsaturated groups.

Abstract: A method of preparing a printing form precursor for printing, or a printed circuit board precursor or a semiconductor precursor, the method comprising the step of applying electromagnetic radiation having a pulse duration of not greater than 1×10?6 seconds, in an imagewise manner, to an imagable surface of the precursor. The imaging process may cause ablation of the coating of the precursor or permit its development in a developer. In each case the imaging radiation needs not be tuned to imaging chemistry (if any) present in the coating. Alternatively the imaging process may induce a change of hydrophilicity or hydrophobicity, or other change of state, of an uncoated substrate.

Abstract: The present invention provides an offset printing blanket or sleeve including one or more layers that are made with a soft thermoplastic polyurethane composition that provides excellent compression set and excellent resistance to apolar solvents, such as naphthenic mineral spirits. The subject invention more specifically reveals a printing blanket comprising: a base layer; a compressible layer, and a printing surface layer, wherein the compressible layer and/or the printing surface layer is comprised of a thermoplastic polyurethane composition, wherein the thermoplastic polyurethane composition made by reacting (a) at least one polyester polyol intermediate with (b) at least one diisocyanate and (c) at least one chain extender; wherein the polyester polyol intermediate comprises an intermediate derived from at least one dialkylene glycol and at least one dicarboxylic acid or an ester or anhydride thereof.

Abstract: Process for the production of a lithographic printing plate, comprising (a) providing a lithographic printing plate precursor comprising (i) a substrate; (ii) a radiation-sensitive coating comprising one or more layers and (iii) optionally an oxygen-impermeable overcoat; (b) image-wise exposing the lithographic printing plate precursor to radiation of a wavelength to which the radiation-sensitive coating is sensitive; (c) optionally subjecting the image-wise exposed precursor to a preheat treatment and/or rinsing with water; (d) removing the non-image areas from the image-wise exposed precursor by means of an alkaline developer solution; (e) optionally subjecting the imaged precursor obtained in step (d) to rinsing with water; (f) treating the imaged lithographic printing plate obtained in step (d) or (e) with a finisher solution; and (g) optionally subjecting the finisher treated plate obtained in step (f) to at least one further process step selected from rinsing with water, drying and baking; characterized

Abstract: According to a method of preparing a lithographic printing plate substantially comprising a step of imagewise exposing a negative lithographic printing plate precursor having an image-recording layer containing (i) a sensitizing dye, (ii) a photopolymerization initiator, (iii) an addition polymerizable compound having an ethylenically unsaturated double bond and (iv) a binder polymer on a support and a step of processing the exposed lithographic printing plate precursor with an aqueous solution containing a carbonate ion, a hydrogen carbonate ion and a surfactant, the processing property is improved, a printing plate free from the tackiness on the surface thereof can be provided, even when the printing plate is stored after the development until printing, deterioration of the printing durability does not occur, and it becomes possible to conduct one solution development with a weak alkaline processing solution.

Abstract: A radiation-sensitive composition can be used to prepare positive-working imageable elements having improved solvent resistance and is useful for making lithographic printing plates. The composition includes an alkaline soluble polymeric binder that is a specific poly(vinyl acetal) that exhibits improved resistance to press chemicals, and a radiation absorbing compound.

Abstract: Adhesion between a photosensitive layer and a substrate after the exposure of a photosensitive lithographic printing plate containing the photosensitive layer and substrate is achicbed by incorporating modified silica particles into the photosensitive layer. The surface of the silica paricles is modified by an organic compound having at least one ethylenically unsaturated group, at least one hydrophilic moiety, and at least one silyloxy group.

Abstract: Wet lithographic printing members for imaging by an inkjet printer using pigment-based aqueous ink and method for calibrating the amount of the inkjet ink to be injected in solid areas of an image are disclosed. An exemplary printing member can be a lithographic printing plate that comprises a base substrate and a top hydrophilic coating layer having a thickness in the range of 2 to 10 microns above the base substrate. A volume of 10 nl/mm2 or less of inkjet ink is used in order to image areas in which the image is solid. Further, areas of the top hydrophilic coating layer, which are imagewise covered by aqueous pigmented inkjet ink, become hydrophobic.

Abstract: A method for gumming a lithographic printing plate includes the steps of a) providing a lithographic printing plate including a lithographic image consisting of printing areas and non-printing areas, and b) jetting a gum solution with an inkjet printer to produce a hydrophilic protective layer on the non-printing areas. An inkjet printer includes a gum solution for producing a hydrophilic protective layer on the non-printing areas and a fluid for the formation of the printing areas of a lithographic image on a lithographic printing plate precursor.

Abstract: The invention provides a radiation-curable polymerizable composition of the invention having (a) a hindered amine compound having no nucleophilic moiety in a molecule, (b) a photo-acid generating agent and (c) a cationic polymerizable monomer. The invention further provides an ink composition formed of the radiation-curable polymerizable composition, a method for ink jet recording having: ejecting the ink composition onto a recording medium by using an ink jet recording apparatus and irradiating the ejected ink composition so as to cure the ink composition, and a printed material obtained thereby. The invention further provides a method for forming a planographic printing plate having: ejecting the ink composition onto a hydrophilic recording medium by using an ink jet recording apparatus; and irradiating the ejected ink composition so as to cure the ink composition for forming a hydrophobic region, and a planographic printing plate obtained thereby.

Abstract: An ink composition includes (A) a polymerization initiator; (B) an ester or amide of a mono-functional (meth)acrylic acid having an alkylene oxide repeating unit in a molecule; and (C) a colorant, and preferably further includes (E) a sensitizing dye.

Abstract: A photosensitive planographic printing plate comprising a substrate and a photosensitive layer including a photopolymerizable compound, wherein the photosensitive layer and the substrate are provided between them with an undercoat layer including a (co)polymer having structural units having ethylenically unsaturated groups bonded with silicon atoms and phosphonic acid groups.

Abstract: A method for digital imaging of a printing form (10) through application of energy is described, in which a burn-off area (66) is detachably fixed by supporting points (68, 84), supporting points (68, 84) being left in place on the printing form (10) through non-imaging of image spots (112) and in which the burn-off from the burn-off area (66) is detached from the printing form (10) in a cleaning step. A supporting point (68, 84) at a reference point is left in place precisely if the number of image spots (110) to be imaged in a surrounding area (18) of the reference point (12) exceeds a limit value and a boundary area (20) in the surrounding area (18) around the reference point (12) contains only image spots (110) to be imaged.

Abstract: A lithographic printing method including exposing an imaging surface layer of a printing plate to a first expose source to render the surface layer uniformly hydrophilic; the surface layer comprising a compound having reversible light controlled wettability whereby the surface layer is reversibly hydrophilic and hydrophobic. The surface layer is disposed over a variable image portion of the printing plate imaging surface or disposed over substantially all of the printing plate imaging surface. The surface is exposed to a second expose source to render image areas of the surface layer hydrophobic. Polar liquid attracts to non-image hydrophilic areas. Hydrophobic liquid colorant attracts to hydrophobic image areas. The surface layer is contacted an offset receiving member and the image is transferred to an image receiving substrate.

Abstract: A printing plate material for lithography showing superior balance of suitability for ink-jet printing and printability is provided. A printing plate material for lithography can include a support and an image-receiving layer containing a binder resin and a matting agent and provided on the support and can be constituted so that a hydrophilic resin having an average degree of polymerization of 2500 or higher is contained as the binder resin, and a matting agent showing an oil absorption of 350 ml/100 g or larger can be contained as the matting agent. It can also be constituted so that, as the binder resin, 60% by weight or more of the hydrophilic resin having an average degree of polymerization of 2500 or higher is contained based on the total binder resin. It can also be constituted so that, as the matting agent, 35 to 100 parts by weight of the matting agent showing an oil absorption of 350 ml/100 g or larger is contained for 100 parts by weight of the binder resin.

Abstract: A lithographic printing plate precursor, which comprises: a support; an image-recording layer; and a protective layer, in this order, wherein at least one of the image-recording layer and the protective layer comprises a phosphonium salt having a specific structure, and a lithographic printing process, which comprises: exposing a lithographic printing plate precursor; supplying an oil-based ink and a fountain solution comprising a phosphonium salt having a specific structure to the exposed lithographic printing plate precursor on a printing machine to remove an unexposed area of an image-recording layer; and conducting printing.

Abstract: The present invention relates to a heat-sensitive lithographic printing plate requiring no on-press development or no water development, which provides clear printed image, has sufficient printing wear resistance, and has improved scumming, more specifically to a heat-sensitive lithographic printing plate comprising, on a water-resistant support, an image-forming layer containing a thermoplastic resin, a water-soluble polymer compound, and at least one selected from a compound of the following formulae (1), (2), (3) and (4). The present invention also relates to a direct heat-sensitive lithographic printing plate by which the generation of sticking phenomenon has been reduced.

Abstract: Process for the posttreatment of an imaged lithographic printing plate comprising (a) providing a lithographic printing plate comprising image areas and non-image areas on a lithographic substrate; (b) bringing the lithographic printing plate of step (a) into contact with a solution comprising a hydrophilic polymer comprising structural units derived from the following compounds: (i) a compound comprising both polyalkylene oxide chains and at least one structural unit which is free-radical polymerizable, and (ii) a monomer capable of copolymerizing with the free-radical polymerizable structural unit of (i) and furthermore comprising at least one acidic functional group with pKs<5, wherein the acidic functional group can be present as a free acid group or in the form of a salt; (c) drying.

Abstract: A method for preparing a lithographic printing plate comprising: exposing a lithographic printing plate precursor comprising a hydrophilic support, a photosensitive layer containing (A) a sensitizing dye having an absorption maximum in a wavelength range of from 350 to 450 nm represented by the formula (I) or (II) as defined herein, (B) a polymerization initiator, (C) a polymerizable compound and (D) a hydrophobic binder polymer having an acid value of 0.3 meq/g or less and a protective layer provided in this order with a laser beam of from 350 to 450 nm; and rubbing a surface of the exposed lithographic printing plate precursor with a rubbing member in a presence of a developer having pH of from 2 to 10 in an automatic processor equipped with the rubbing member to remove the protective layer and an unexposed area of the photosensitive layer.

Abstract: An imaging member is disclosed having a surface layer comprising a heat-sensitive material whose surface compatibility to printing agents, such as toners and inks, can be substantially reversed in response to small changes in temperature. The imaging member is suitable for use in lithographic and printing applications, permitting reversible switching between compatibility states of printing agents, such as between hydrophilic and hydrophobic states or oleophilic and oleophobic states, and enabling rapid production of images on a recording medium.

Abstract: The invention provides an ink composition having at least (A) a polymerization initiator, (B) an ester or amide of (meth)acrylic acid having a 1,3-dioxolane ring skeleton or a 1,3-dioxane ring skeleton or (B?) an ester or amide of (meth)acrylic acid having a 1,3-diketone structure, and (C) a colorant. The invention further provides an inkjet recording method and a method for producing a planographic printing plate, each of which includes at least (I) ejecting the ink composition onto a hydrophilic support and (II) curing the ink composition by irradiating the ejected ink composition with active radiation so as to form a hydrophobic image region on the hydrophilic support. The invention furthermore provides a planographic printing plate formed by the method for producing a planographic printing plate.

Abstract: A method of deactivating and on-press developing an exposed lithographic printing plate is disclosed. The plate comprises on a substrate a photosensitive layer developable with ink and/or fountain solution and capable of hardening upon exposure to a radiation. The plate is exposed with the radiation, deactivated, and then on-press developed with ink and/or fountain solution. The deactivation of the exposed plate allows the handling of the plate under regular office light or any other light without causing the hardening of the non-exposed areas of the photosensitive layer.

Abstract: A method for making a heat-sensitive negative-working lithographic printing plate precursor including the steps of providing a support having a hydrophilic surface or which is provided with a hydrophilic layer, and applying onto the support a coating solution including an infrared absorbing agent, hydrophobic thermoplastic polymer particles, a hydrophilic binder, and a polymer including siloxane and/or perfluoroalkyl monomeric units.

Abstract: An imaged and developed element, such as a lithographic printing plate, is provided by infrared radiation imaging of a negative-working imagable element having an outermost imagable layer that includes a free radically polymerizable component, a free radical initiator composition comprising a diaryliodonium borate, and an infrared radiation absorbing compound. The imagable layer also includes a polymeric binder that is represented by the following Structure (I): -(A)w-(A?)w?-??(I) wherein A represents recurring units comprising a pendant reactive vinyl group, A? represents recurring units other than those represented by A, w is from about 1 to about 70 mol %, and w? is from about 30 to about 99 mol %. The imagewise exposed element is developed with a gum to remove only the non-exposed regions. The gum has a pH greater than 7 and up to about 11 and at least 1 weight % of an anionic surfactant.

Abstract: A method for producing a lithographic printing plate is provided, wherein, in the non-alkaline development of a lithographic printing plate precursor having a protective layer, even if the protective layer components are mingled into the developer, the reduction in development removability of the image recording layer and the generation of development scum can be inhibited; an on-press development type lithographic printing plate precursor with excellent inking property, high scratch resistance, satisfied on-press developability and good fine line reproducibility is provided; and a lithographic printing method is provided, each of which is a method for producing a lithographic printing plate, comprising: imagewise exposing a lithographic printing plate precursor comprising a support, an image recording layer and a protective layer, and rubbing the plate surface by a rubbing member of an automatic processor in the presence of a developer at a pH of 2 to 10 to remove the protective layer and the image recording

Abstract: The present invention provides a planographic printing plate precursor, including: a support; and a photosensitive layer containing a polymerizable compound; an oxygen barrier layer; and a protective layer containing a filler (preferably an organic resin particle), the layers being formed in this order on the support. The present invention also provides a stack of planographic printing plate precursors, produced by stacking the planographic printing plate precursors with the photosensitive layer side outermost layer and the support side rear surface of the adjacent plate precursor in direct contact with each other.

Abstract: Reusable printing forms and thermal image setting on the printing forms is optimized in terms of performance. A method for manufacturing the printing form, in particular a rewritable printing form, having a thermally insulating layer, is distinguished by the fact that the thermally insulating layer is produced by the configuration of individual layers to form a layer sequence as a multilayer system. A printing form which is manufactured by the method according to the invention can have images set on it with a low power image setting device, as it is possible to effectively prevent heat from dissipating in an undesirably pronounced manner, for example into a metallic carrier.

Abstract: A method of on-press developing a thermosensitive lithographic printing plate with ink and/or fountain solution is described. The lithographic plate comprises on a substrate a thermosensitive layer soluble or dispersible in ink and/or fountain solution and capable of hardening upon exposure to an infrared radiation. The printing plate can be a pre-coated plate in the form of sheet or web, or can be prepared on press by coating a thermosensitive layer onto a substrate that is a sheet material or a seamless sleeve mounted on a plate cylinder or is the surface of a plate cylinder of the lithographic press.

Abstract: Imageable printing forms are irradiated by radiant energy corresponding to the image information, the energy being absorbed in the printing form. The energy coupled in this manner is available for patterning the printing form surface. A printing form having a plurality of substantially planar functional zones, which have at least one informational zone that is modifiable in accordance with image information and an absorption zone for absorbing energy from a radiation is distinguished in that a buffer zone is provided which differs at least partially from the absorption zone, receives energy from the absorption zone, and releases energy to the informational zone.

Abstract: A lithographic printing plate precursor comprising a hydrophilic support, an undercoat layer and a laser-sensitive photopolymerizable layer, wherein the undercoat layer contains a copolymer containing (a1) a repeating unit having at least one ethylenically unsaturated bond and (a2) a repeating unit having at least one functional group capable of interacting with a surface of the support, and the repeating unit (a1) is a repeating unit represented by the formula (A1) as defined herein.

Abstract: The present application describes a template with feature profiles that have multiple sidewall angles. The multiple sidewall angles facilitate control over critical dimensions and reduce issues related to template release.

Abstract: A solvent-soluble, radiation-polymerizable, oleophilic resin coating non-ionically adhered on a hydrophilic substrate can be imagewise exposed to polymerizing radiation and then directly processed by the application of disruptive mechanical forces such as compression or tension to remove the unimaged areas as undissolved particles, using pressurized water and brushing pre-press, or the tack of the ink on-press.

Abstract: An ink composition including a cationically polymerizable compound (a), a compound (b) that generates acid by irradiation with a radiation ray, and a basic compound (c) that becomes less basic by irradiation with a radiation ray. Also, an inkjet recording method and a printed material using the ink composition, as well as a planographic printing plate obtained by using the ink composition and a method of producing the planographic printing plate are disclosed.

Abstract: The present invention relates to a print board that includes a substrate and a coating film that is formed on the substrate. The film includes an ink-philic portion and an ink-phobic portion disposed between adjacent ink-philic portions. The ink-phobic portion has more hydrophobicity than the ink-philic portion.

Abstract: An imprinting method is disclosed that, in embodiment, includes contacting first and second spaced target regions of an imprintable medium on a substrate with first and second templates respectively to form respective first and second imprints in the medium and separating the first and second templates from the imprinted medium.

Abstract: Negative-working imageable elements such as lithographic printing plate precursors, include a free-radically polymerizable component, an initiator composition that is capable of generating free radicals sufficient to initiate polymerization of the free-radically polymerizable component upon exposure to imaging radiation in the presence of a radiation absorbing compound, a radiation absorbing compound, an aerobic free radical inhibitor, optionally a polymeric binder that is not a free radically polymerizable component, and an anaerobic free radical inhibitor. The molar ratio of the anaerobic free radical inhibitor to the aerobic free radical inhibitor is at least 1:1. This combination of inhibitors provides increased shelf life and good latent image stability particularly when the element includes a polymeric topcoat layer that functions as an oxygen barrier.

Abstract: A device as well as method for removing the overcoat without developing an imagewise exposed lithographic printing plate is disclosed. The device comprises a structure for providing water or an aqueous solution and a transfer means for transporting said plate through said structure. The plate comprises a substrate, an ink and/or fountain solution developable photosensitive layer, and an overcoat. The exposed plate is transported through the structure to remove the overcoat by contacting with said water or aqueous solution, preferably under a brushing or rubbing action. The overcoat removal device is preferably connected to a laser imager so that the plate can be imaged on the laser imager and then directly transferred to the overcoat removal device to remove the overcoat. The overcoat-removed plate is further mounted on press to develop with ink and/or fountain solution to remove the non-hardened areas of the photosensitive layer.

Abstract: The present invention relates to negative-working imageable elements that can be used for the manufacture of printing plates. These imageable elements can be developed on on-press by the action of a lithographic printing ink used in combination with either water or a fountain solution. The imageable elements comprise an imageable layer that is not removable in water or fountain solution alone. The imageable layer includes a free radically polymerizable compound, a free radical initiator composition, an infrared radiation absorbing compound, and a polymeric binder comprising poly(alkylene oxide) pendant groups, and preferably additionally pendant cyano groups.

Abstract: Radiation-sensitive composition comprising (a) at least one photopolymerizable compound with at least one ethylenically unsaturated group accessible to a free-radical polymerization, wherein the at least one photopolymerizable compound has a molecular weight of 3,000 or less and can be obtained by reacting a diisocyanate with (I) an ethylenically unsaturated compound with a hydroxy group, and at the same time (ii) a saturated organic compound with an NH group and an OH group, wherein the reactants are used in amounts according to the following condition: Number of moles of isocyanate groups ?number of moles of OH plus NH groups; (b) at least one sensitizer which absorbs radiation from the wavelength range of 250 to 450 nm of the electromagnetic spectrum and is selected from: dihydropyridines of formula (I) and oxazole derivatives of formula (II): (II) (c) at least one coinitiator capable of forming free radicals together with the sensitizer (b) and selected from 2,2?,4,4?,5?5-hexaarylbiimidazoles, compounds w

Abstract: A sleeve is provided to be drawn over a rotary support in order to define a blanket cylinder of an indirect or offset printing machine in which the blanket cylinder cooperates with a lithographic plate cylinder from which the sleeve receives the data to be printed onto a substrate which moves between the blanket cylinder and a pressure cylinder. The sleeve comprises an inner cylindrical portion configured to be drawn over the aforesaid rotary support. The outer surface of the inner cylindrical portion is covered by a single layer structure that cooperates directly with the lithographic plate and with the substrate to be printed. The single layer structure is composed at least partly of polyurethane material and cells occupying no less than about 0.6 percent by weight and no more than about 4.4 percent by weight and uniformly dispersed throughout the single layer. The single layer is formed of a precursor that is deposited by ribbon technology onto the outer surface of the inner cylindrical portion.