EP0390033B1 - Procédé et dispositif de grainage d'un support pour des couches photosensibles - Google Patents

Procédé et dispositif de grainage d'un support pour des couches photosensibles Download PDF

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Publication number
EP0390033B1
EP0390033B1 EP90105701A EP90105701A EP0390033B1 EP 0390033 B1 EP0390033 B1 EP 0390033B1 EP 90105701 A EP90105701 A EP 90105701A EP 90105701 A EP90105701 A EP 90105701A EP 0390033 B1 EP0390033 B1 EP 0390033B1
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EP
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Prior art keywords
phase
current
electrodes
frequency
alternating
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Expired - Lifetime
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EP90105701A
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German (de)
English (en)
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EP0390033A1 (fr
Inventor
Joachim Dipl.-Ing Stroszynski
Peter Dr. Dipl.-Chem. Lehmann
Heinz Dipl.-Ing. Börgerding
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Hoechst AG
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Hoechst AG
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    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C25F3/04—Etching of light metals
    • 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
    • B41N3/034—Chemical or electrical pretreatment characterised by the electrochemical treatment of the aluminum support, e.g. anodisation, electro-graining; Sealing of the anodised layer; Treatment of the anodic layer with inorganic compounds; Colouring of the anodic layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S204/00—Chemistry: electrical and wave energy
    • Y10S204/09—Wave forms

Definitions

  • the invention relates to a method for roughening a support for light-sensitive layers, the surface of which is roughened mechanically and subsequently electrochemically in an aqueous electrolyte bath by applying a three-phase or alternating current to the electrodes opposite the support.
  • Such supports are used for the production of presensitized printing plates, the material of the supports which are processed in plate or tape form being a metal, in particular aluminum.
  • aluminum strips for the production of printing plates are roughened mechanically, electrochemically or in a combination of a mechanical and electrochemical roughening process.
  • the aim is that the aluminum surface used for the water flow and the adhesion of the light-sensitive layer has a certain structure and uniformity.
  • the surface structures have pyramid-like shapes
  • electrochemically roughened aluminum surfaces have a sponge-like structure with many cups and depressions.
  • Mechanical roughening has the advantage of a smaller specific energy consumption per square meter surface compared to purely electrochemical roughening of the support, but the disadvantage of a surface that is too coarse, on which crystalline structures are also present in addition to the pyramidal structures.
  • Mechanical roughening processes are generally grain processes, such as wire or brush grain, or emery grinding, while the electrochemical roughening is generally carried out by electrolytic etching in an aqueous electrolyte solution.
  • German patent 19 62 728 describes a process for the continuous production of a lithographic surface on a metal strip by wet grinding and electrochemical treatment in an electrolyte, in which the electrolyte is used to wet the metal surface during the grinding and the electrochemical treatment is carried out immediately afterwards the grinding is carried out.
  • a fine-grained abrasive is suspended in the electrolyte, and the abrasive suspension is blasted onto the moving belt in a wide jet that extends over the entire width of the metal belt.
  • the electrolyte is, for example, an aqueous acidic or aqueous alkaline bath.
  • the aluminum plate is first roughened by grinding with a moist emery compound, and after rinsing and optionally cleaning the plate, the grained surface of the aluminum plate anodized in a sulfuric acid solution with direct current at a voltage in the range of approximately 10 to 20 V and a current density in the range of approximately 1 to 2.2 A / dm 2. Finally, the grained and anodized surface of the aluminum plate is treated with a primer to improve the bonding of the light-sensitive layer to be applied to the surface with the carrier material.
  • DE-AS 26 50 762 discloses a method for the electrolytic graining of aluminum substrates for lithography by means of alternating current in an electrolyte essentially containing hydrochloric acid or nitric acid, an alternating voltage being applied in this method, the anode voltage of which is greater than the cathode voltage and that Ratio of the cathodic coulombic input to the anodic coulombic input is less than 1.
  • the anodic half period of the alternating current is set equal to or less than the cathodic half period.
  • the diameter and the depth of the pores or holes in the surface of the aluminum substrate can be adjusted as desired by selecting a suitable ratio of the cathodic to the anodic coulombic input, determined by the voltage setting.
  • the frequency of the regulated alternating current is not limited to the usual alternating current frequency range, ie 50 to 60 Hz. With higher frequencies, finer pores are obtained on the grained surface.
  • German patent 30 12 135 describes a method for producing a support for lithographic printing plates, in which the surface of an aluminum plate is mechanically roughened by wet grinding, aluminum is chemically etched from the surface of the plate and then an electric current with a waveform that by alternating polarity is applied to the plate in an acidic aqueous solution so that the ratio of the amount of charge formed with the plate as the anode to the amount of charge formed with the plate as the cathode is 0.5 / 1 to 1.0 / 1 lies.
  • the electrolysis is carried out so that the current density, if the plate is the anode, is not less than 20 A / dm2 and the amount of charge formed with the plate as the anode is 200 coulombs / dm2 or less, and the anode and cathode voltages at 1 up to 50 V. Finally, the plate is subjected to anodic surface oxidation.
  • the aim is to combine the advantages of both processes. It is expected that the mechanically roughened surface of the metal carrier will be finely overlaid by wells and depressions which are caused by the electrochemical roughening. However, it is shown in an undesirable manner that, in addition to the pyramidal structures of the mechanical roughening, relatively large holes occur which are caused by the electrochemical roughening. Around To achieve reasonably usable results, the mechanical roughening must be followed by a disproportionately high level of electrochemical roughening, as a result of which the power consumption increases very sharply, due to the holes that arise in the electrochemical roughening. The cause of the holes are too high and too long a current, which on the other hand is necessary to make the distribution of the holes very even.
  • the object of the invention is to improve a method of the type described above in such a way that the surface of a carrier moving at high working speed for photosensitive layers is roughened mechanically and electrochemically in such a way that the electrochemical roughening superimposed on the mechanical pyramidal roughened surface of the carrier consists of uniformly and finely distributed wells and depressions, and has no holes or visible cross-cuts.
  • This object is achieved by a method according to the preamble of claim 1 in such a way that the frequency of the three-phase or alternating current is chosen to be greater than or equal to 50 Hz to 300 Hz and that the frequency is set higher with increasing transport speed of the carrier through the electrolytic bath.
  • the carrier is moved through the electrolytic bath at a constant speed between 50 and 150 m / min, and the three-phase or alternating current frequency is chosen such that a distance t of the electrical cross-shocks on the carrier surface, which in time with the polarity changes of the rotational or Alternating current are formed, less than or equal to 15 mm.
  • the distance t of the electrical cross-shocks on the carrier surface is in the range from 3 to 15 mm chosen.
  • the distance t between the cross-passages is reduced to such an extent that there is a uniform appearance on the surface of the carrier.
  • the frequency of the current can be raised to 300 Hz, for example.
  • the distance is t the electrical cross-cuts then on the carrier surface at a three-phase or alternating current frequency of 300 Hz less than or equal to 6 mm.
  • the current density of the electrodes which are immersed in the aqueous electrolyte bath is 5 to 50% of the current density of the electrodes which are operated at a three-phase or alternating current frequency of 50 Hz for the purely electrochemical roughening.
  • the current density of the electrodes is 10 to 20% of the current density of the electrodes which are operated at a three-phase or alternating current frequency of 50 Hz for purely electrochemical roughening, and this first-mentioned current density is in the range from 250 to 1400 A / m 2.
  • the device for carrying out the method comprises electrodes in the electrolyte bath, with the secondary side are connected to a first three-phase transformer, the primary side of which is connected to a regulating and a power transformer for three-phase current via a three-phase frequency converter.
  • the three-phase frequency converter converts the mains frequency of the three-phase current in a range of greater than or equal to 50 to 300 Hz, at a voltage between 1 to 380 V for the individual phases of the three-phase current, which are fed in via lines.
  • the three-phase transformer is connected in a star or delta connection.
  • further electrodes in an electrolyte bath are connected to the secondary side of a second three-phase transformer, the primary side of which is connected to three-phase current via a three-phase control and a power transformer.
  • the second three-phase transformer is also connected in a star or delta connection.
  • the further electrodes are arranged at the beginning and / or at the end of the electrolyte bath, and the three-phase control transformer is fed with three-phase current at mains frequency via lines.
  • alternating current is used instead of three-phase current, and one pair of electrodes in an electrolyte bath is connected to the secondary side of an alternating current transformer, and the primary side of each alternating current transformer is connected to alternating current via an alternating current frequency converter.
  • Each of the AC frequency converters works in a frequency range greater than or equal to 50 Hz to 300 Hz, at a voltage of 1 to 380 V of the AC current.
  • the device shown schematically in FIG. 1 consists of an electrolyte bath 1, the electrolyte of which, for example dilute aqueous sulfuric, nitric or hydrochloric acid.
  • a carrier 2 in the form of a tape moves in the running direction A through the electrolyte bath 1.
  • Only the device for electrochemical roughening of the surface of the carrier 2 is shown in FIG. 1, but not the parts of the device or system in which the mechanical roughening of the carrier surface is carried out becomes.
  • Such system or device parts are shown and described in detail in German Offenlegungsschrift 19 62 729 and German Patent 19 62 728.
  • electrodes 3, 4 and 5 are arranged in the electrolyte bath 1, which electrodes are connected to three windings of the secondary side of a first three-phase transformer 6, which are not described in more detail.
  • the corresponding three windings on the primary side of the three-phase transformer 6 are connected to a three-phase frequency converter 7, which is connected via lines L1, L2 and L3 to regulating transformers, not shown, which are fed by a common power transformer for three-phase current.
  • the three-phase frequency converter 7 makes it possible to convert the three-phase current fed in at the mains frequency of 50 Hz into a three-phase current in the frequency range greater than / equal to 50 Hz to 300 Hz.
  • the frequency of the three-phase current is chosen to be greater than the mains frequency of 50 Hz, and with increasing transport speed of the carrier 2 through the electrolyte bath 1, the frequency converted is also set higher.
  • the carrier 2 passes through the electrolyte bath 1 generally at a constant speed, which can be chosen between 50 to 150 m / min.
  • the device according to the invention is operated to equalize these cross-cuts so that the freely selectable parameters, namely the transport speed of the carrier 2 and the frequency of the current applied to the electrodes 3, 4 and 5, are chosen so that the distance t of the cross-cuts is less than or equal to 15 mm, in particular 6 mm.
  • the current density of the electrodes 3, 4 and 5 is 5 to 50%, in particular 10 to 20% of the current density of the electrodes which are operated at a three-phase or alternating current frequency of 50 Hz for the purely electrochemical roughening.
  • the current density of electrodes 3, 4 and 5 is in the range of 250 to 1400 A / m2.
  • the carrier 2 is rinsed, for example, without intermediate pickling and is electrochemically anodized.
  • the currents fed to the three-phase frequency converter 7 have voltages which are in the range from 1 to 380 V, and are transformed in terms of voltage such that the voltages applied to the electrodes 3, 4 and 5 are between 20 and 50 V, in particular 35 V.
  • the embodiment of the device according to FIG. 2 comprises an electrolyte bath 11 through which the carrier 2 is transported.
  • the electrodes 3, 4 and 5 there are further electrodes 8, 9 and 10 in the electrolyte bath 11, which may contain an electrolyte of the same consistency as the electrolyte bath 1 of the embodiment according to FIG. 1.
  • the running direction of the carrier 2 is not shown in FIG. 2, since it can move either from left to right or from right to left.
  • the electrodes 8, 9 and 10 are arranged at the end of the electrolyte bath in the direction of movement from left to right and the electrodes 8, 9, 10 are located at the beginning of the electrolyte bath 11 in the opposite direction of movement of the support 2.
  • the electrodes 8, 9 and 10 are connected to the corresponding windings of the secondary side of a second three-phase transformer 13, which are not described in more detail.
  • the corresponding windings on the primary side of the second Three-phase transformers 13 are connected to three-phase current via a three-phase control transformer 12 and a power transformer, not shown.
  • the second three-phase transformer 13 is connected in a star or delta connection.
  • the three-phase control transformer 12 is connected to the power transformer (not shown) via lines L1, L2 and L3.
  • the three-phase control transformer 12 is fed with three-phase current at mains frequency, ie at 50 Hz, via lines L1, L2 and L3; frequency conversion, as in the case of electrodes 3, 4 and 5, does not take place.
  • a further three electrodes can be arranged in a correspondingly larger electrolyte bath 11 to the left of electrodes 3, 4 and 5.
  • Such a construction boils down to the fact that both at the beginning and at the end of an extended electrolyte bath 11 there is a set of three electrodes which are supplied with three-phase current at the mains frequency, while the middle set of electrodes 3, 4 and 5 with three-phase current is higher Frequency is operated as the network frequency.
  • the electrodes 3, 4 and 5 it is preferably possible for the electrodes 3, 4 and 5 to be arranged at the beginning or at the end of the electrolyte bath and with the electrodes 8, 9 and 10, which then lie behind or in front of the electrodes 3, 4 and 5 are working together.
  • the third embodiment of the device according to the invention differs from the first embodiment according to FIG. 1 in that instead of the individual electrodes, which are charged with three-phase current higher than the mains frequency, electrode pairs 14, 15; 16, 17 and 18, 19 are present in an electrolytic bath 20, through which the carrier 2 runs in the running direction A.
  • the electrolyte in the electrolyte bath 20 has the same composition as was described with reference to FIG. 1.
  • One of the electrode pairs 14, 15; 16, 17 and 18, 19 is connected to the secondary side of an associated AC transformer 21, 22 and 23, respectively. On the primary side, each alternating current transformer is connected to alternating current via an alternating current frequency converter 24, 25 and 26.
  • the alternating current is fed in via lines L1, L2 of the frequency converter 24, lines L2, L1 of the frequency converter 25 and lines L1, L2 of the frequency converter 26.
  • the symbols L1 and L2 stand for the two phase lines for alternating current.
  • the electrochemical roughening takes place in accordance with the so-called center conductor method, ie the alternating current circuit of the one pair of electrodes 14, 15 is closed via the electrolyte of the electrolyte bath 20, the section of the carrier 2 located below the two electrodes 14, 15 and the secondary winding of the alternating current transformer 21.
  • Each of the AC frequency converters 24, 25, 26 is operated in a frequency range greater than / equal to 50 Hz to 300 Hz, at a voltage of 1 to 380 V of the AC current.
  • the fourth embodiment of the device shown in FIG. 4 comprises an electrolyte bath 31 through which the carrier 2 is transported. Similar to the embodiment according to FIG. 2, the running direction of the carrier 2 is not shown in FIG. 4, since the carrier 2 can move through the electrolyte bath 31 either from left to right or from right to left.
  • further electrode pairs 27, 28 and 29, 30 are present in the electrolyte bath 31.
  • These pairs of electrodes are connected to the windings on the secondary sides of alternating current transformers 32 and 33, which are fed on the primary side via alternating current regulating transformers 34 and 35 with mains frequency alternating current.
  • the electrode pairs 14, 15; 16, 17; 18, 19 are arranged either at the beginning or at the end of the electrolyte bath 31.
  • the fed AC currents regardless of whether they are frequency-converted or have a mains frequency, have a voltage level in the range from 1 to 380 V.
  • the frequency conversion of the mains frequency of the AC currents fed in is in the range from / greater than or equal to 50 Hz to 300 Hz
  • Alternating current applied electrodes is 5 to 50%, in particular 10 to 20% of the current density at the electrodes for the purely electrochemical roughening.
  • a superimposition of the mechanically roughened surface of the carrier 2 is achieved, for example by wet brushing with a suspension of pumice and / or quartz powder, by means of electrochemical roughening, the current frequencies of the three-phase or alternating currents applied to the electrodes being im are generally much higher than 50 Hz.
  • a roughening pattern that is optically free of transversal impact, a fine superimposition of the mechanically roughened surface of the carrier by the electrochemically generated roughening, lower specific power consumption and a very high working speed for the carrier, up to 150 m / min, are achieved.
  • the roughness of the mechanically roughened surface of the carrier is considerably greater than the roughness that is obtained by the electrochemical roughening.
  • the surface of the support is comparatively light, and the printing plate produced with such a support shows no color fog after development.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Claims (18)

  1. Procédé de grainage d'un support pour des couches photosensibles dont la surface est grattée mécaniquement et ensuite attaquée par voie électrochimique dans un bain d'électrolyte aqueux en appliquant un courant alternatif triphasé ou monophasé aux électrodes situées en regard du support, caractérisé en ce que la fréquence du courant triphasé ou monophasé est choisie entre 50 Hz et 300 Hz et que la fréquence est augmentée avec l'accroissement de la vitesse de transport du support dans le bain d'électrolyte.
  2. Procédé selon la revendication 1, caractérisé en ce que le support est déplacé à travers le bain d'électrolyte à une vitesse constante comprise entre 50 et 150 m/min et que la fréquence du courant alternatif triphasé ou monophasé est choisie de sorte qu'une distance t des sections électriques sur la surface du support qui sont formées à la cadence des changements de polarité du courant triphasé ou monophasé soit inférieure ou égale à 15 mm.
  3. Procédé selon la revendication 2, caractérisé en ce que la distance t des sections électriques sur la surface du support, exprimée selon la relation t = v/f, la vitesse de transport de support v étant exprimée en mm/sec et la fréquence du courant triphasé ou monophasé f en hertz (1/sec), est choisie dans la gamme comprise entre 3 et 15 mm.
  4. Procédé selon la revendication 3, caractérisé en ce que la distance t des section électriques sur la surface du support pour une fréquence de courant triphasé ou monophasé de 300 Hz est choisie inférieure ou égale à 6 mm.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la densité de courant des électrodes qui plongent dans le bain d'électrolyte aqueux représente 5 à 50 % de la densité de courant des électrodes qui sont utilisées pour le grainage électrochimique pur avec une fréquence de courant triphasé ou monophasé de 50 Hz.
  6. Procédé selon la revendication 5, caractérisé en ce que la densité de courant des électrodes qui plongent dans le bain d'électrolyte aqueux représente 10 à 20 % de la densité de courant des électrodes qui sont utilisées pour le grainage électrochimique pur avec une fréquence de courant triphasé ou monophasé de 50 Hz, et que la densité de courant mentionnée en premier est de 250 à 1400 A/m².
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'après le grainage électrochimique le support est rincé sans décapage intermédiaire et est anodisé par voie électrochimique.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que les tensions à transformer en fonction de la fréquence sont de 1 à 380 volts pour un domaine de fréquence compris entre 50 et 300 Hz et que les tensions présentes sur les électrodes sont de 20 à 50 V, et particulièrement 35 V.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que, au début et/ou à la fin du grainage électrochimique du support, un traitement électrochimique du support est réalisé avec un courant continu.
  10. Dispositif pour la mise en oeuvre du procédé selon les revendications 1 à 9, caractérisé en ce que des électrodes (3, 4, 5) dans le bain d'électrolyte (1) sont reliées au secondaire d'un premier transformateur à courant triphasé (6) dont le primaire est relié, par l'intermédiaire d'un convertisseur de fréquence triphasée (7) et de transformateurs de réglage, à un transformateur de puissance pour courant triphasé.
  11. Dispositif selon la revendication 10, caractérisé en ce que le convertisseur de fréquence triphasée (7) convertit la fréquence de réseau du courant triphasé dans un domaine compris entre 50 et 300 Hz, à une tension comprise entre 1 et 380 V pour les phases individuelles du courant triphasé qui sont alimentées par des conducteurs (L1, L2, L3).
  12. Dispositif selon les revendications 10 et 11, caractérisé en ce que le transformateur à courant triphasé (6) est branché en étoile ou en triangle.
  13. Dispositif selon les revendications 10 à 12, caractérisé en ce que des électrodes supplémentaires (8, 9, 10) sont reliées dans un bain d'électrolyte (11) avec le secondaire d'un deuxième transformateur à courant triphasé (13) dont le primaire est relié au courant triphasé par l'intermédiaire d'un transformateur de réglage à courant triphasé (12) et d'un transformateur de puissance et que le deuxième transformateur à courant triphasé (13) est branché en étoile ou en triangle.
  14. Dispositif selon la revendication 13, caractérisé en ce que des électrodes supplémentaires (8, 9, 10) sont disposées au début et/ou à l'extrémité du bain d'électrolyte (11) et que le transformateur de réglage à courant triphasé (12) est alimenté à la fréquence du réseau par l'intermédiaire de conducteurs (L1, L2, L3).
  15. Dispositif pour la mise en oeuvre du procédé selon les revendications 1 à 9, caractérisé en ce que chaque paire d'électrodes (14, 15 ; 16, 17 ; 18, 19) dans un bain d'électrolyte (20) est reliée au secondaire d'un transformateur à courant alternatif monophasé (21 ; 22 ; 23) et que le primaire de chaque transformateur à courant monophasé est relié au courant alternatif par l'intermédiaire d'un convertisseur monophasé de fréquence (24 ; 25 ; 26).
  16. Dispositif selon la revendication 15, caractérisé en ce que chacun des convertisseurs monophasés de fréquence (24 ; 25 ; 26) fonctionne dans un domaine de fréquence de 50 Hz à 300 Hz à une tension alternative de 1 à 380 volts.
  17. Dispositif selon la revendication 16, caractérisé en ce que des paires d'électrodes supplémentaires (27, 28, 29, 30) dans un bain d'électrolyte (31) sont reliées au secondaire de transformateurs à courant alternatif monophasé (32 ; 33) dont les primaires sont reliés au courant alternatif par l'intermédiaire de transformateurs de réglage à courant alternatif monophasé (34 ; 35).
  18. Dispositif selon la revendication 17, caractérisé en ce que des paires d'électrodes supplémentaires (27, 28, 29, 30) sont disposées au début et/ou à l'extrémité du bain d'électrolyte (31) et que du courant alternatif à la fréquence du réseau est envoyé aux transformateurs de réglage à courant alternatif monophasé (34 ; 35).
EP90105701A 1989-03-30 1990-03-26 Procédé et dispositif de grainage d'un support pour des couches photosensibles Expired - Lifetime EP0390033B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910213 1989-03-30
DE3910213A DE3910213A1 (de) 1989-03-30 1989-03-30 Verfahren und vorrichtung zum aufrauhen eines traegers fuer lichtempfindliche schichten

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EP0390033A1 EP0390033A1 (fr) 1990-10-03
EP0390033B1 true EP0390033B1 (fr) 1993-06-16

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US (1) US5082537A (fr)
EP (1) EP0390033B1 (fr)
JP (1) JPH02298300A (fr)
KR (1) KR900014155A (fr)
BR (1) BR9001389A (fr)
CA (1) CA2013299A1 (fr)
DE (2) DE3910213A1 (fr)

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US5221442A (en) * 1991-03-07 1993-06-22 Fuji Photo Film Co., Ltd. Method and apparatus for electrolytic treatment
JP2707381B2 (ja) * 1991-11-05 1998-01-28 富士写真フイルム株式会社 印刷版用アルミニウム支持体の電解処理方法
DE69307803T2 (de) * 1992-07-20 1997-05-28 Fuji Photo Film Co Ltd Verfahren zur elektrolytischen Behandlung
GB9326150D0 (en) * 1993-12-22 1994-02-23 Alcan Int Ltd Electrochemical roughening method
EP0924101B1 (fr) * 1997-12-16 2003-09-17 Fuji Photo Film Co., Ltd. Procédé pour la fabrication d'un support en aluminium pour plaque lithographique
JP2000017500A (ja) 1998-06-26 2000-01-18 Fuji Photo Film Co Ltd 電解処理装置及び電解処理方法
DE19859216A1 (de) * 1998-12-21 2000-06-29 Agfa Gevaert Ag Verfahren und Vorrichtung zum Aufrauhen eines Trägers für lichtempfindliche Schichten
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DE3910213A1 (de) 1990-10-11
US5082537A (en) 1992-01-21
KR900014155A (ko) 1990-10-23
DE59001749D1 (de) 1993-07-22
JPH02298300A (ja) 1990-12-10
BR9001389A (pt) 1991-04-09
EP0390033A1 (fr) 1990-10-03
CA2013299A1 (fr) 1990-09-30

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