EP0976550B1 - Verfahren zur Herstellung aus einer Latex positiv-arbeitenden Druckplatte - Google Patents

Verfahren zur Herstellung aus einer Latex positiv-arbeitenden Druckplatte Download PDF

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Publication number
EP0976550B1
EP0976550B1 EP19980202577 EP98202577A EP0976550B1 EP 0976550 B1 EP0976550 B1 EP 0976550B1 EP 19980202577 EP19980202577 EP 19980202577 EP 98202577 A EP98202577 A EP 98202577A EP 0976550 B1 EP0976550 B1 EP 0976550B1
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EP
European Patent Office
Prior art keywords
hydrophobic polymer
reactive
latex
polymer
lithographic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19980202577
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English (en)
French (fr)
Other versions
EP0976550A1 (de
Inventor
Huub c/o Agfa-Gevaert N.V. Van Aert
Leo c/o Agfa-Gevaert N.V. Oelbrandt
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Agfa Gevaert NV
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Agfa Gevaert NV
Agfa Gevaert AG
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Filing date
Publication date
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Priority to EP19980202577 priority Critical patent/EP0976550B1/de
Priority to DE69818660T priority patent/DE69818660T2/de
Priority to US09/342,103 priority patent/US6354209B1/en
Publication of EP0976550A1 publication Critical patent/EP0976550A1/de
Application granted granted Critical
Publication of EP0976550B1 publication Critical patent/EP0976550B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B41C1/1025—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials using materials comprising a polymeric matrix containing a polymeric particulate material, e.g. hydrophobic heat coalescing particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1066—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by spraying with powders, by using a nozzle, e.g. an ink jet system, by fusing a previously coated powder, e.g. with a laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/24—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/26—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions not involving carbon-to-carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/26—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions not involving carbon-to-carbon unsaturated bonds
    • B41C2210/266—Polyurethanes; Polyureas

Definitions

  • the present invention relates to a method for directly making lithographic printing plates by using hydrophobic polymer latex printing, which makes it possible to produce the lithographic plates directly from digital data output from computers, facsimiles, or the like without using any intermediate films.
  • the direct plate-making method a method wherein an image or non-image portion is directly formed on a substrate by ink-jet printing is known to the art.
  • the ink-jet printing system is a relatively rapid image output system and has a simple construction because it does not require any complex optical system. Therefore, the printing system makes an apparatus for making printing plates simple and the cost for making printing plates can be reduced since the maintenance labor is largely reduced.
  • Japanese Kokai Publication 113456/1981 proposes the methods for preparing printing plates wherein ink-repelling materials (e.g. curable silicone) are printed on a printing plate by ink-jet printing.
  • the printing plate obtained by this method is an intaglio printing plate in which the ink-repelling material formed on the surface of the substrate serves as a non-image part.
  • the resolution of the printed images at shadow area or reversed lines is not so good.
  • a large amount of ink is needed in this method because the ink-repelling material must be deposited on the whole non-image part which occupies most of the surface of the printing plate.
  • US-P- 5 312 654 discloses a method for making lithographic printing plates comprising: forming an image on a substrate having an ink absorbing layer and a hydrophilized layer between the substrate and absorbing layer by ink-jet printing using a photopolymerizable ink composition, and exposing it to an active light in the wavelength region curing the image.
  • the printing endurance of said printing plates is low.
  • EP-A- 533 168 discloses a method for avoiding ink spreading by coating the lithographic base with an ink absorbing layer which is removed after ink printing. This is an uneconomical and cumbersome method.
  • Research Disclosure 289118 of May 1988 discloses a method for making printing plates with the use of an ink jet wherein the ink is a hydrophobic polymer latex.
  • said printing plates have a poor ink acceptance and a low printing endurance.
  • a method for making a lithographic printing plate comprising the steps of dispensing in a predetermined pattern a latex of particles of a hydrophobic polymer onto an optionally modified hydrophilic surface of a lithographic base, characterized in that said hydrophobic polymer and the optionally modified hydrophilic surface of the lithographic base have mutual reactive groups.
  • the lithographic base may be an anodised aluminum support.
  • a particularly preferred lithographic base is an electrochemically grained and anodised aluminum support.
  • the anodised aluminum support may be treated to improve the hydrophilic properties of its surface.
  • the aluminum support may be silicated by treating its surface with sodium silicate solution at elevated temperature, e.g. 95°C.
  • a phosphate treatment may be applied which involves treating the aluminum oxide surface with a phosphate solution that may further contain an inorganic fluoride.
  • the aluminum oxide surface may be rinsed with a citric acid or citrate solution. This treatment may be carried out at room temperature or may be carried out at a slightly elevated temperature of about 30 to 50°C.
  • a further interesting treatment involves rinsing the aluminum oxide surface with a bicarbonate solution.
  • the aluminum oxide surface may be treated with polyvinylphosphonic acid, polyvinylmethylphosphonic acid, phosphoric acid esters of polyvinyl alcohol, polyvinylsulphonic acid, polyvinylbenzenesulphonic acid, sulphuric acid esters of polyvinyl alcohol, and acetals of polyvinyl alcohols formed by reaction with a sulphonated aliphatic aldehyde It is further evident that one or more of these post treatments may be carried out alone or in combination.
  • Said anodized aluminium support has as reactive groups oxide and hydroxyl groups.
  • the lithographic base with an optionally modified hydrophilic surface comprises a flexible support, such as e.g. paper or plastic film, provided with a cross-linked optionally modified hydrophilic layer.
  • a particularly suitable cross-linked hydrophilic layer may be obtained from a hydrophilic binder cross-linked with a cross-linking agent such as a melamine-resin, formaldehyde, dialdehydes like glutaric dialdehyde glyoxal, polyisocyanate or a hydrolysed tetra-alkylorthosilicate. The latter is particularly preferred.
  • hydrophilic binder there may be used hydrophilic (co)polymers such as for example, homopolymers and copolymers of vinyl alcohol with as reactive functions hydroxyl groups, acrylamide with as reactive function an amide group, methylol acrylamide, methylol methacrylamide, acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, all with a hydroxyl function as reactive group, maleic anhydride with an anhydride as reactive group, maleic acid with a hydroxyl function as reactive group, maleic anhydride/vinylmethylether copolymers anhydride with an anhydride as reactive group.
  • the hydrophilic binder can partially contain crosslinkable or reactive groups e.g.
  • the hydrophilicity of the (co)polymer or (co)polymer mixture used is preferably the same as or higher than the hydrophilicity of polyvinyl acetate hydrolyzed to an extent of at least 60 percent by weight, preferably at least 80 percent by weight.
  • the amount of crosslinking agent, in particular of tetraalkyl orthosilicate, is preferably at least 0.2 parts by weight per part by weight of hydrophilic binder, more preferably between 0.5 and 5 parts by weight, most preferably between 1.0 parts by weight and 3 parts by weight.
  • the amount of cross-linking agent is not so high that no hydroxyl groups of the polyvinyl alcohol remains
  • a cross-linked hydrophilic layer in a lithographic base used in accordance with the present embodiment preferably also contains substances that increase the mechanical strength and the porosity of the layer.
  • colloidal silica may be used.
  • the colloidal silica employed may be in the form of any commercially available water-dispersion of colloidal silica for example having an average particle size up to 40 nm, e.g. 20 nm.
  • inert particles of larger size than the colloidal silica may be added e.g. silica prepared according to Stöber as described in J. Colloid and Interface Sci., Vol.
  • alumina particles or particles having an average diameter of at least 100 nm which are particles of titanium dioxide or other heavy metal oxides.
  • the lithographic base comprises a hydrophilic binder which comprises reactive groups selected from the group consisting of epoxides, alkoxysilanes and reactive acrylamides which can react with hydroxyl, amino or amido functions of the hydrophobic polymer.
  • the thickness of a cross-linked hydrophilic layer in a lithographic base in accordance with this embodiment may vary in the range of 0.2 to 25 ⁇ m and is preferably 1 to 10 ⁇ m.
  • plastic film e.g. substrated polyethylene terephthalate film, substrated polyethylene naphthalate film, cellulose acetate film, polystyrene film, polycarbonate film etc.
  • the plastic film support may be opaque or transparent.
  • glass with a thickness less than 1.2 mm and a failure stress (under tensile stress) equal or higher than 5 x 10 7 Pa.
  • the amount of silica in the adhesion improving layer is between 200 mg per m 2 and 750 mg per m 2 .
  • the ratio of silica to hydrophilic binder is preferably more than 1 and the surface area of the colloidal silica is preferably at least 300 m 2 per gram, more preferably at least 500 m 2 per gram.
  • a latex is defined as a stable colloidal dispersion of a polymeric substance in an aqueous medium.
  • the polymer particles are usually approximately spherical and of typical colloidal dimensions: particle diameters range from about 20 to 1000 nm.
  • the dispersion medium is usually a dilute aqueous solution containing substances such as electrolytes, surfactants, hydrophilic polymers and initiator residues.
  • the polymer latices are classified in various way. By origin, they are classified as natural latices, produced by metabolic processes occuring in the cells of certain plant species; synthetic latices, produced by emulsion polymerization of monomers; and artificial latices, produced by dispersing a polymer in a dispersing medium or by solvent exchange.
  • Preferred latices in connection with the invention are synthetic and artificial latices. These artificial latices are rather referred to as polymer dispersions. These polymers or oligomeric species could be dispersed in water either before their polymerization and/or crosslinking or afterwards.
  • the colloidal stability of the dispersion can be improved by the addition of dispersion agents (surface-active compounds) or by ionic groups incorporated via the monomeric species or via modification.
  • the dispersions of the polymers (or oligomers) can contain crosslinking agents, polymerization catalyst, or incorporated species which can give self-crosslinking of the polymer, to obtain sufficient mechanical strength
  • a hydrophobic polymer for use in the present invention has preferably a Tg below 150°C, more preferably a Tg below 120°C.
  • a hydrophobic polymer according to the invention is a polymer which comprises at least one monomer with a reactive group.
  • suitable reactive groups are akoxysilane groups, oxazoline groups and activated carboxylic acids, e.g. carbodiimide derivatives and preferably epoxide groups and trialkoxysilane groups. Said reactive groups are contained in the side chain of the hydrophobic polymer.
  • Alkoxysilane containing monomers can contain the following polymerizable groups: acrylate, methacrylate, acrylamide, methacrylamide, vinyl ether, styrene-derivatives.
  • the reactive group in the hydrophobic polymer can be introduced in the hydrophobic polymer by copolymerization of monomers comprising said reactive groups or can be introduced by chemical modification of said hydrophobic polymer.
  • said hydrophobic polymer is a copolymer containing at least a comonomer without a reactive group.
  • Said hydrophobic polymer comprises a comonomer with a reactive group in a range of 1 to 50% by weight, more preferably in a range of 3 to 30 % by weight of the polymer.
  • Said hydrophobic copolymers are preferably polymers dispersed in water, prepared by chain copolymerization of monomers like styrene, styrene derivatives, acrylates, methacrylates, acrylamides, methacrylamides, or olefines or prepared by step polymerization and forming polymers like polyurethanes, polyethers, polyamides, polyamic acids and polyether imides.
  • Hydrophobic copolymers for use in synthetic latices according to the present invention are, for example, polystyrene and styrenic copolymers such as styrene/butadiene/acrylic acid copolymers, polyacrylates such as polymethyl methacrylate and polybutyl acrylate, copolymers of butyl acrylate and methyl methacrylate, copolymers of butyl acrylate and styrene, copolymers of butadiene and methyl methacrylate.
  • polystyrene and styrenic copolymers such as styrene/butadiene/acrylic acid copolymers
  • polyacrylates such as polymethyl methacrylate and polybutyl acrylate, copolymers of butyl acrylate and methyl methacrylate, copolymers of butyl acrylate and styrene, copolymers of butadiene and methyl methacryl
  • Hydrophobic polymers for use in artificial latices according to the present invention are, for example polyurethanes such as the reaction product of a diisocyanate with a hydroxyl terminated polymer or oligomer (such as polyglycol or polyester) or reaction products of diisocyanates with amine-functional dialcohols (such as N-methyldiethanolamine, which can be quaternized e.g. using dimethylsulphate, methyliodide or 1,4-dibromobutane).
  • polyurethanes such as the reaction product of a diisocyanate with a hydroxyl terminated polymer or oligomer (such as polyglycol or polyester) or reaction products of diisocyanates with amine-functional dialcohols (such as N-methyldiethanolamine, which can be quaternized e.g. using dimethylsulphate, methyliodide or 1,4-dibromobutane).
  • polyurethane latices e.g. as described by D. Dieterich, Angew. Macromol. Chem., 76, 79 (1979), J. Dieterich et al., J. Oil Col. Chem. Assoc., 53, 636, (1970), V.S. Reddy, J. Diapers. Sci.Technol., 14, 417, (1993)).
  • Stabilization of the polyurethane dispersions can also be achieved via anionic groups such as carboxylate, sulphonate, phosphonate. Addition of a dispersion agent (surface active compound) can give sufficient stabilization to the polyurethane latex.
  • Diisocyanates which could be used to produce the polyurethanes could be aliphatic or aromatic, for example hexametylene 1,6-diisocyanate, isophorone diisocyanate, 1,6-diisocyanatotrimethylcyclohexane, diphenylmethane 4,4'-diisocyanate, naphthalene 1,5-diisocyanate.
  • colored hydrophobic polymer synthetic or artificial latices
  • carbon black or dyes or pigments can be mixed with one of the above mentioned copolymers.
  • polymer particles containing color structures in the repeating units in particular colored polymer particles which have obtained their color by means of a chemical reaction based on oxidative coupling of a color coupling group in the polymer structure of the particles with an aromatic primary amino compound, as described in Japanese Kokai 59/30873 can be used as colored hydrophobic polymer latex.
  • the hydrophobic polymer synthetic or artificial latex particles have preferably a particle size between 0.01 and 1 ⁇ m, more preferably between 0.01 ⁇ m and 0.25 ⁇ m.
  • the latex can contain from 1 to 70 % by weight of hydrophobic polymer, more preferably from 2 to 40 % by weight of hydrophobic polymer, most preferably from 5 to 30 % by weight of hydrophobic polymer.
  • the latex can be dispensed onto the lithographic base having a hydrophilic surface preferably by an ink jet printer.
  • a volatilization preventive agent is added to the latex according to the present invention, if necessary, to suppress evaporation of the liquid in the ink-jet nozzle and to prevent clogging due to precipitation of the dissolved or dispersed components.
  • a surfactant is preferably added to the the latex used according to the present invention to adjust the size of droplets of the latex dispersed by the ink jet nozzle, to adjust the surface tension of the latex so that images can be formed in high resolution.
  • Said surfactant can be an anionic, a cationic, a nonionic or an amphoteric compound.
  • heat polymerisation inhibitors can be also added.
  • desinfectants can be also added.
  • buffers and solubilizers is effective to improve the solubility or dispersibility of the polymer.
  • Addition of defoaming agents and foam suppressing agents are also possible to suppress foaming of the latex in the ink-jet nozzle.
  • the image forming requires the following steps. On demand, microdots of the hydrophobic polymer latex are sprayed onto the lithographic base in a predetermined pattern as the plate passes through the printer or by a printhead shutteling over the plate. According to one embodiment of the invention, the microdots have a diameter of about 20 ⁇ m.
  • heating may be required for the the lithographic base sprayed with hydrophobic polymer latex. This can be done by irradiation, by convection or by contact with a hot surface e.g.in an oven, by flash exposure, by IR-heaters or by laser irradiation.
  • the image forming can also be carried out with the lithographic base already on the printing cylinder.
  • the heating of the polymer can be effected by using a heated printing cylinder.
  • the printing plate of the present invention can also be used in the printing process as a seamless sleeve printing plate.
  • This cylindrical printing plate has such a diameter that it can be slided on the print cylinder. More details on sleeves are given in "Grafisch Nieuws" ed. Keesing, 15, 1995, page 4 to 6.
  • a 0.30 mm thick aluminum foil was degreased by immersing the foil in an aqueous solution containing 5 g/l of sodium hydroxide at 50°C and rinsed with demineralized water.
  • the foil was then electrochemically grained using an alternating current in an aqueous solution containing 4 g/l of hydrochloric acid, 4 g/l of hydroboric acid and 5 g/l of aluminum ions at a temperature of 35°C and a current density of 1200 A/m 2 to form a surface topography with an average center-line roughness Ra of 0.5 ⁇ m.
  • the aluminum foil was then etched with an aqueous solution containing 300 g/l of sulfuric acid at 60°C for 180 seconds and rinsed with demineralized water at 25°C for 30 seconds.
  • the foil was subsequently subjected to anodic oxidation in an aqueous solution containing 200 g/l of sulfuric acid at a temperature of 45°C, a voltage of about 10 V and a current density of 150 A/m 2 for about 300 seconds to form an anodic oxidation film of 3.00 g/m 2 of Al 2 O 3 then washed with demineralized water, posttreated with a solution containing polyvinylphosphonic acid and subsequently with a solution containing aluminum trichloride, rinsed with demineralized water at 20°C during 120 seconds and dried.
  • KIESELSOL 300 F (tradename for 30 % aqueous dispersion of colloidal silica - surface area of 300 m 2 per g).
  • Anionic wetting agents ( 0.6 g ) and biocides (1 g ) were added.
  • Nr Latex(table 1) support Heating temperature Endurance 1 1 PTT 22°C - 2 1 PTT 60°C - 3 2 PTT 22°C -- 4 2 PTT 60°C 0 5 2 ALU 22°C -- 6 2 ALU 60°C 0 7 3 PTT 22°C - 8 3 PTT 60°C 0 9 3 ALU 22°C -- 10 3 ALU 60°C - 11 4 ALU 60°C ++ 12 5 PTT 22°C ++ 13 5 ALU 22°C ++ 14 5 ALU 60°C ++ 15 6 PTT 60°C ++ 16 6 ALU 22°C ++ 17 6 ALU 60°C ++ 18 7 ALU 60°C ++ -Support:Alu (anodized aluminum) or PTT (polyvinyl alcohol hardened layer: Polyvinyl alcohol-Titane dioxide- Tetramethyl orthosilicate) -Endurance -- very poor - poor 0 moderate + good ++ very good.
  • PTT polyvinyl alcohol hardened layer

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (10)

  1. Ein durch die nachstehenden Schritte gekennzeichnetes Verfahren zur Herstellung einer lithografischen Druckplatte : das Aufsprühen gemäß einem vorgegebenen Muster eines Latex von Teilchen eines hydrophoben Polymers auf eine gegebenenfalls modifizierte hydrophile Oberfläche einer lithografischen Unterlage, dadurch gekennzeichnet, daß das hydrophobe Polymer und die gegebenenfalls modifizierte hydrophile Oberfläche der lithografischen Unterlage zueinander reaktive Gruppen enthalten.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das hydrophobe Polymer eine reaktionsfähige Funktion aus der Gruppe bestehend aus Epoxiden, Alkoxysilanen, reaktionsfähigen Acrylamiden, Oxazolingruppen und aktivierten Carbonsäuren enthält.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das hydrophobe Polymer ein in Wasser dispergiertes Polymer ist, das durch Kettencopolymerisation von Monomeren wie Styrol, Styrol-Derivaten, Acrylaten, Methacrylaten, Acrylamiden, Methacrylamiden oder Olefinen oder durch Stufenpolymerisation hergestellt ist, wobei Polymere wie Polyurethane, Polyether, Polyamide, Polyaminsäuren und Polyetherimide gebildet werden.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die lithografische Unterlage ein hydrophiles Bindemittel mit reaktionsfähigen Gruppen aus der Gruppe bestehend aus Epoxiden, Alkoxysilanen, reaktionsfähigen Acrylamiden, Oxazolingruppen und aktivierten Carbonsäuren enthält.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die reaktionsfähigen Gruppen durch Copolymerisation von die reaktionsfähige Gruppe enthaltenden Monomeren oder durch chemische Modifikation des Polymers in das hydrophobe Polymer eingebettet werden.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das hydrophobe Polymer zumindest ein Comonomer ohne reaktionsfähige Gruppe enthält.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das hydrophobe Polymer ein eine reaktionsfähige Gruppe enthaltendes Comonomer in einem Verhältnis zwischen 1 und 50 Gew.-%, bezogen auf das Polymer, enthält.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das hydrophobe Polymer einen Tg unter 150°C aufweist.
  9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die lithografische Unterlage mit einer hydrophilen Oberfläche ein eloxierter Aluminiumträger oder ein mit einer vernetzten hydrophilen Schicht versehener biegsamer Träger ist.
  10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Latex mittels eines Tintenstrahldruckers dispergiert wird.
EP19980202577 1998-07-31 1998-07-31 Verfahren zur Herstellung aus einer Latex positiv-arbeitenden Druckplatte Expired - Lifetime EP0976550B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19980202577 EP0976550B1 (de) 1998-07-31 1998-07-31 Verfahren zur Herstellung aus einer Latex positiv-arbeitenden Druckplatte
DE69818660T DE69818660T2 (de) 1998-07-31 1998-07-31 Verfahren zur Herstellung aus einer Latex positiv-arbeitenden Druckplatte
US09/342,103 US6354209B1 (en) 1998-07-31 1999-06-29 Method for making positive working printing plates from a latex

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980202577 EP0976550B1 (de) 1998-07-31 1998-07-31 Verfahren zur Herstellung aus einer Latex positiv-arbeitenden Druckplatte

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EP0976550A1 EP0976550A1 (de) 2000-02-02
EP0976550B1 true EP0976550B1 (de) 2003-10-01

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6740464B2 (en) * 2000-01-14 2004-05-25 Fuji Photo Film Co., Ltd. Lithographic printing plate precursor
DE60011103T2 (de) * 2000-11-30 2005-05-25 Agfa-Gevaert Tintenstrahldruckherstellungsverfahren zu lithographischen Druckplatten
US6662723B2 (en) 2000-11-30 2003-12-16 Agfa-Gevaert Computer-to-plate by ink jet
US6983694B2 (en) 2002-04-26 2006-01-10 Agfa Gevaert Negative-working thermal lithographic printing plate precursor comprising a smooth aluminum support
DE60224642T2 (de) * 2002-04-26 2009-01-15 Agfa Graphics N.V. Negativ-arbeitender thermischer Flachdruckplattenvorläufer, der einen Aluminiumträger mit einer glatten Oberfläche enthält

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Publication number Priority date Publication date Assignee Title
JP2995075B2 (ja) * 1990-07-11 1999-12-27 コニカ株式会社 印刷版の形成方法
US5466653A (en) * 1994-06-29 1995-11-14 E. I. Du Pont De Nemours And Company Method for preparing negative-working wash-off relief images and non-photosensitive elements for use therein
US5820932A (en) * 1995-11-30 1998-10-13 Sun Chemical Corporation Process for the production of lithographic printing plates

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EP0976550A1 (de) 2000-02-02
DE69818660T2 (de) 2004-08-19

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