EP0934823B1 - Wärmeempfindliches Aufzeichnungsmaterial und Verfahren zur Herstellung von verarbeitungsfreien Flachdruckformen damit - Google Patents

Wärmeempfindliches Aufzeichnungsmaterial und Verfahren zur Herstellung von verarbeitungsfreien Flachdruckformen damit Download PDF

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Publication number
EP0934823B1
EP0934823B1 EP19990200196 EP99200196A EP0934823B1 EP 0934823 B1 EP0934823 B1 EP 0934823B1 EP 19990200196 EP19990200196 EP 19990200196 EP 99200196 A EP99200196 A EP 99200196A EP 0934823 B1 EP0934823 B1 EP 0934823B1
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EP
European Patent Office
Prior art keywords
heat
imaging material
layer
sensitive imaging
hydrophilic surface
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
EP19990200196
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English (en)
French (fr)
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EP0934823A1 (de
Inventor
Joan Vermeersch
Marc Van Damme
Guy Hauquier
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Agfa Gevaert NV
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Agfa Gevaert NV
Agfa Gevaert AG
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Priority to EP19990200196 priority Critical patent/EP0934823B1/de
Publication of EP0934823A1 publication Critical patent/EP0934823A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
    • 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
    • B41C1/1041—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by modification of the lithographic properties without removal or addition of material, e.g. by the mere generation of a lithographic pattern
    • 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
    • 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
    • B41C2210/02—Positive working, i.e. the exposed (imaged) areas are removed
    • 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
    • B41C2210/06—Developable by an alkaline solution
    • 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
    • B41C2210/262—Phenolic condensation polymers, e.g. novolacs, resols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/036—Chemical or electrical pretreatment characterised by the presence of a polymeric hydrophilic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/038—Treatment with a chromium compound, a silicon compound, a phophorus compound or a compound of a metal of group IVB; Hydrophilic coatings obtained by hydrolysis of organometallic compounds

Definitions

  • the present invention relates to a heat-sensitive imaging element for making lithographic printing plates. More specifically the invention relates to a heat-sensitive imaging element which requires no processing.
  • Lithographic printing is the process of printing from specially prepared surfaces, some areas of which are capable of accepting ink, whereas other areas will not accept ink.
  • a photographic material is made imagewise receptive to oily or greasy ink in the photo-exposed (negative working) or in the non-exposed areas (positive working) on a ink-repelling background.
  • lithographic plates also called surface litho plates or planographic printing plates
  • a support that has affinity to water or obtains such affinity by chemical treatment is coated with a thin layer of a photosensitive composition.
  • Coatings for that purpose include light-sensitive polymer layers containing diazo compounds, dichromate-sensitized hydrophilic colloids and a large variety of synthetic photopolymers. Particularly diazo-sensitized systems are widely used.
  • the exposed image areas become insoluble and the unexposed areas remain soluble.
  • the plate is then developed with a suitable liquid to remove the diazonium salt or diazo resin in the unexposed areas.
  • EP-A- 444 786, JP- 63-208036, and JP- 63-274592 disclose photopolymer resists that are sensitized to the near IR. So far, none has proved commercially viable and all require wet development to wash off the unexposed regions.
  • EP-A- 514 145 describes a laser addressed plate in which heat generated by the laser exposure causes particles in the plate coating to melt and coalescence and hence change their solubility characteristics. Once again, wet development is required.
  • EP-A- 652 483 discloses a lithographic printing plate requiring no dissolution processing which comprises a substrate bearing a heat-sensitive coating, which coating becomes relatively more hydrophilic under the action of heat. Said system yields a positive working printing plate.
  • EP-A- 609 941 describes a heat-mode recording material comprising on a substrate a metallic layer and a thin hydrophobic layer which becomes hydrophilic upon exposure. However the lithographic performance of the obtained printing plate is poor.
  • a heat-sensitive imaging element for making lithographc printing plates comprising on a lithographic base, having a hydrophilic surface, a silver layer and on top thereof an oleophilic polymeric layer having a thickness of less than 5 ⁇ m characterised in that said polymeric layer comprises a polymer containing phenolic groups.
  • the thickness of the silver layer is preferably from 0.01 ⁇ m to 2 ⁇ m, and most preferably from 0.05 ⁇ m to 1.5 ⁇ m.
  • a silver layer for use in this invention as the metallic layer can be made according to the principles of the silver complex diffusion transfer reversal process, hereinafter called DTR-process, having been described e.g. in US-P 2,352,014 and in the book “Photographic Silver Halide Diffusion Processes” by André Rott and Edith Weyde - The Focal Press - London and New York, (1972).
  • DTR-process the silver complex diffusion transfer reversal process
  • non-developed silver halide of an information-wise exposed photographic silver halide emulsion layer material is transformed with a so-called silver halide solvent into soluble silver complex compounds which are allowed to diffuse into an image-receiving element and are reduced therein with a developing agent, generally in the presence of physical development nuclei, to form a silver image having reversed image density values (DTR-image) with respect to the black silver image obtained in the exposed areas of the photographic material.
  • a developing agent generally in the presence of physical development nuclei
  • a silver halide emulsion disposed on a lithographic base having a hydrophilic surface is strongly exposed to actinic radiation and then developed, or otherwise processed to maximum blackness.
  • the black opaque emulsion is converted to a reflective recording material by heating at least to 270 °C in an oxygen containing environment until the emulsion coating assumes a shiny reflective appearance.
  • the silver is provided using vapour or vacuum deposition.
  • a thin metal layer is formed by the following steps :
  • the oleophilic layer provided on top of the silver layer comprises a polymer containing phenolic groups.
  • Preferred polymers containing phenolic groups are phenolic resins (e.g. novolac) or hydroxyphenyl substituted polymers (e.g. polyhydroxystyrenes).
  • the oleophilic layer has a thickness of less than 5 ⁇ m. As a consequence a highly sensitive heat-sensitive imaging element is obtained.
  • the use of a polymer containing phenolic groups furthermore improves the lithographic performance ( ink acceptance, scratch resistance, durability) of the lithographic printing plates obtained according to the present invention.
  • the lithographic base having a hydrophilic surface can be an anodised aluminum.
  • a particularly preferred lithographic base having a hydrophilic surface is an electrochemically grained and anodised aluminum support.
  • said aluminum support is grained in nitric acid, yielding imaging elements with a higher sensitivity.
  • an 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 a 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 can 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.
  • the lithographic base can comprise a flexible support, such as e.g. paper or plastic film, provided with a hardened hydrophilic layer.
  • a particularly suitable hardedned rough hydrophilic layer may be obtained from a hydrophilic binder hardened with a hardening agent such as formaldehyde, glyoxal, polyisocyanate or preferably a hydrolysed tetra-alkylorthosilicate.
  • hydrophilic binder there may be used hydrophilic (co)polymers such as for example, homopolymers and copolymers of vinyl alcohol, acrylamide, methylol acrylamide, methylol methacrylamide, acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate or maleic anhydride/vinylmethylether copolymers.
  • hydrophilic (co)polymers such as for example, homopolymers and copolymers of vinyl alcohol, acrylamide, methylol acrylamide, methylol methacrylamide, acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate or maleic anhydride/vinylmethylether copolymers.
  • a hardened hydrophilic layer on a flexible support used in accordance with the present embodiment preferably also contains substances that increase the mechanical strength and the porosity of the layer e.g. colloidal silica.
  • inert particles of larger size than the colloidal silica can be added e.g. silica prepared according to Stöber as described in J. Colloid and Interface Sci., Vol. 26, 1968, pages 62 to 69 or alumina particles or particles having an average diameter of at least 100 nm which are particles of titanium dioxide or other heavy metal oxides. Incorporation of these particles gives the surface of the hardened hydrophilic layer a uniform rough texture consisting of microscopic hills and valleys.
  • the thickness of the hardened hydrophilic layer 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, cellulose acetate film, polystyrene film, polycarbonate film etc.
  • the plastic film support may be opaque or transparent.
  • 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 a surface area of 500 m 2 per gram.
  • the heat-sensitive imaging element is image-wise scanning exposed using a laser, preferably a laser that operates in the infrared or near-infrared, i.e. wavelength range of 700-1500nm. Most preferred are laser diodes emitting in the near-infrared.
  • the imaging element can be used without an additional wet treatment as a lithographic printing plate.
  • the printing plate obtained according to the present invention can also be used in the printing process as a seamless sleeve printing plate.
  • This cylindrical printing plate wich has as diameter the diameter of the print cylinder is slided on the print cylinder instead of applying in a classical way a classically formed printing plate. More details on sleeves are given in 'Grafisch Nieuws' ed. Keesing, 15, 1995, page 4 to 6.
  • This layer contained 82.7% of titaniumdioxide, 9.1% of polyvinylalcohol, 8.2% of hydrolysed tetramethylorthosilicate and 0.17 ⁇ of palladiumsulphide (particle size 2-3 nm).
  • an emulsion layer and top layer were simultaneously coated by means of the cascade coating technique.
  • the emulsion layer was coated with a wet thickness of 30 ⁇ m and such that the silver halide coverage expressed as AgNO 3 was 2.50 g/m 2 and the gelatin content was 1.50 g/m 2 .
  • the toplayer was coated with a wet thickness of 15 ⁇ m such that the gelatin content was 0.7 g/m 2 .
  • the top layer further contained 61 mg/m 2 of Levanyl Rot and 0.14 g/m 2 matting agent.
  • the unexposed DTR material as described above was developed for 12s at 24 °C in an aqueous alkaline solution having the following ingredients: Anhydrous sodium sulphite 120 g Sodium hydroxide 22 g Carboxymethylcellulose 4 g Potassium bromide 0.75 g Anhydrous sodium thiosulphate 8 g Aluminum sulphate.18H 2 O 8 g Ethylene diamine tetraacetic acid tetrasodium salt 4.2 g Hydroquinone 20 g Methylfenidon 6.25 g Demineralized water to make pH (25°C) > 12.5 1L
  • the initiated diffusion transfer was allowed to continue for 18 s to form a silver layer, whereafter the material was rinsed with water containing 0.03 ⁇ of trypsine at 50 °C.
  • the DTR material was prepared as described in example 1.
  • the unexposed DTR material was developed for 12s at 24 °C in an aqueous alkaline solution as described in example 1.
  • the initiated diffusion transfer was allowed to continue for 18 s to form a silver layer, whereafter the material was rinsed with water at 50 °C.
  • one of the obtained metallic silver layers was coated with a novolac layer (2 g/m 2 Alnovol SPN452).
  • the 4 materials were all imaged with a Gerber C42TTM internal drum platesetter at 12,000 rpm (367 m/s, pixel dwell time 0.032 ⁇ s) and 2540 dpi.
  • the power level of the laser in the image plane was 5.4 W.
  • the plates were printed on a Heidelberg GTO46 printing machine under more critical conditions than in example 1 with a conventional ink (K+E) and a fountain solution of 5% G671c (commercialy available from Agfa-Gevaert N.V.) + 10% isopropanol.
  • the plate that did not get an extra coating layer after developing did not show any ink-uptake in the unexposed areas and the material prepared as described in example 1 (comparative example) showed a slower ink-uptake while the one with polyethylene as a final coating (comparative example), resulted in a better ink-uptake and no scumming, but the image was already damaged after 25 prints.
  • the one with the novolac coating on top showed a good ink-uptake, no scumming and a runlength > 3000 prints.
  • the DTR material was prepared as described in example 1 or 2.
  • the unexposed DTR material was developed for 12s at 24 °C in an aqueous alkaline solution as described in example 1 or 2.
  • the initiated diffusion tranfer was allowed to continue for 18 s to form a silver layer, whereafter the material was rinsed with water at 50 °C.
  • one of the thus obtained metallic silver layers was used as such, one was coated with a polyethylene layer (1 g/m 2 ) and one was coated with a top layer of a copolymer of polyvinylbutyral, polyvinylalcohol and polyvinylacetate, esterified with trimellitic acid anhydride (1 g/m 2 ).
  • one of the obtained metallic silver layers was coated with a novolac layer (1 g/m 2 Alnovol SPN452).
  • the 4 materials were all imaged with a Gerber C42TTM internal drum platesetter at 12,000 rpm (367 m/s, pixel dwell time 0.032 ⁇ s) and 2540 dpi.
  • the power level of the laser in the image plane was 5.4 W.
  • the plates were printed on a Heidelberg GTO46 printing machine with a conventional ink (K+E) and a fountain solution of 5% G671c (commercially available from Agfa-Gevaert N.V.) + 10% isopropanol.
  • the plate that did not get an extra coating layer after developing did not show any ink-uptake in the unexposed areas.
  • the ones with polyethylene (comparative example) and the one with the copolymer as a final coating resulted in a good ink-uptake and no scumming, but the image was already damaged after 25-50 prints.
  • the one with the novolac coating on top showed a good ink-uptake, no scumming and a runlength > 3000 prints.
  • the DTR material was prepared as described in example 1 to 3.
  • the unexposed DTR material was developed for 12s at 24 °C in an aqueous alkaline solution as described in example 1 to 3.
  • the initiated diffusion tranfer was allowed to continue for 18 s to form a silver layer, whereafter the material was rinsed with water at 50 °C.
  • the 4 materials were all imaged with a Gerber C42TTM internal drum platesetter at 12,000 rpm (367 m/s, pixel dwell time 0.032 ⁇ s) and 2540 dpi.
  • the power level of the laser in the image plane was 5.4 W.
  • the plates were cleaned with a dry cotton pad and subsequently printed.
  • the plate that did not get an extra coating layer after developing showed strong ablation during imaging and no residues were left on the exposed parts.
  • the plates were printed on a Heidelberg GTO46 printing machine with a conventional ink (K+E) and a fountain solution of 5% G671c (commercially available from Agfa-Gevaert N.V.) + 10% isopropanol.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Claims (9)

  1. Ein wärmeempfindliches Bilderzeugungsmaterial zur Herstellung von lithografischen Druckplatten, das auf einer lithografischen Unterlage mit einer hydrophilen Oberfläche eine Silberschicht und eine darüber vergossene oleophile polymere Schicht mit einer Stärke von weniger als 5 µm enthält, dadurch gekennzeichnet, daß die polymere Schicht ein phenolische Gruppen enthaltendes Polymer enthält.
  2. Ein wärmeempfindliches Bilderzeugungsmaterial nach Anspruch 1, dadurch gekennzeichnet, daß das phenolische Gruppen enthaltende Polymer ein Phenolharz oder ein hydroxyphenylsubstituiertes Polymer ist.
  3. Ein wärmeempfindliches Bilderzeugungsmaterial nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Stärke der Silberschicht zwischen 0,05 und 1,5 µm liegt.
  4. Ein wärmeempfindliches Bilderzeugungsmaterial nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die lithografische Unterlage mit einer hydrophilen Oberfläche ein gekörnter und eloxierter Aluminiumträger ist.
  5. Ein wärmeempfindliches Bilderzeugungsmaterial nach Anspruch 4, dadurch gekennzeichnet, daß die lithografische Unterlage mit einer hydrophilen Oberfläche ein eloxierter Aluminiumträger ist, der mit einer Verbindung aus der Gruppe bestehend aus Polyvinylphosphonsäure, Polyvinylmethylphosphonsäure, Phosphorsäureestern von Polyvinylalkohol, Polyvinylsulfonsäure, Polyvinylbenzolsulfonsäure, Schwefelsäureestern von Polyvinylalkohol und Acetalen von Polyvinylalkoholen, die durch Reaktion mit einem sulfonierten alifatischen Aldehyd gebildet sind, verarbeitet ist.
  6. Ein wärmeempfindliches Bilderzeugungsmaterial nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die lithografische Unterlage mit einer hydrophilen Oberfläche einen ein hydrophiles Bindemittel enthaltenden Kunststoffträger enthält, wobei das Bindemittel mittels eines hydrolysierten Tetraalkylorthosilikats vernetzt ist.
  7. Ein Verfahren zur Herstellung einer lithografischen Druckplatte, gekennzeichnet durch den Schritt, in dem ein wärmeempfindliches Element, das auf einer lithografischen Unterlage mit einer hydrophilen Oberfläche eine Silberschicht und eine darüber vergossene oleophile polymere Schicht mit einer Stärke von weniger als 5 um enthält, bildmäßig mit aktinischer Strahlung belichtet wird, dadurch gekennzeichnet, daß die polymere Schicht ein phenolische Gruppen enthaltendes Polymer enthält.
  8. Ein durch die nachstehenden Schritte gekennzeichnetes Verfahren zur Herstellung mehrfacher Kopien von einer Vorlage :
    bildmäßige Belichtung mit aktinischer Strahlung von einem wärmeempfindlichen Bilderzeugungsmaterial, das auf einer lithografischen Unterlage mit einer hydrophilen Oberfläche eine Silberschicht und eine darüber vergossene oleophile polymere Schicht mit einer Stärke von weniger als 5 µm enthält, dadurch gekennzeichnet, daß die polymere Schicht ein phenolische Gruppen enthaltendes Polymer enthält,
    Beginnen des Druckzyklus ohne zusätzliche Naßverarbeitung des belichteten Bilderzeugungsmaterials.
  9. Ein Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß die bildmäßige Belichtung mit einem IR-Laser durchgeführt wird.
EP19990200196 1998-02-09 1999-01-18 Wärmeempfindliches Aufzeichnungsmaterial und Verfahren zur Herstellung von verarbeitungsfreien Flachdruckformen damit Expired - Lifetime EP0934823B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19990200196 EP0934823B1 (de) 1998-02-09 1999-01-18 Wärmeempfindliches Aufzeichnungsmaterial und Verfahren zur Herstellung von verarbeitungsfreien Flachdruckformen damit

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98200372 1998-02-09
EP98200372 1998-02-09
EP19990200196 EP0934823B1 (de) 1998-02-09 1999-01-18 Wärmeempfindliches Aufzeichnungsmaterial und Verfahren zur Herstellung von verarbeitungsfreien Flachdruckformen damit

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EP0934823A1 EP0934823A1 (de) 1999-08-11
EP0934823B1 true EP0934823B1 (de) 2003-04-02

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2340323C2 (de) * 1973-08-09 1984-09-13 Hoechst Ag, 6230 Frankfurt Verfahren zur Herstellung von Flachdruckformen
EP0573092A1 (de) * 1992-06-05 1993-12-08 Agfa-Gevaert N.V. Verfahren zur Herstellung eines Bildes unter Verwendung von einem Aufzeichnungsmaterial nach dem Wärmeverfahren
US5401611A (en) * 1993-02-05 1995-03-28 Agfa-Gevaert, N.V. Heat mode recording material and method for making a lithographic plate
EP0816071B1 (de) * 1996-07-04 2000-10-04 Agfa-Gevaert N.V. Wärmeempfindliches Aufzeichnungselement, sowie Verfahren zur Herstellung von lithographischen Druckplatten damit

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