EP0097301A1 - Procédé pour la modification par l'enlèvement de supports en aluminium décapés par voie électrochimique et l'utilisation de ceux-ci pour la fabrication des plaques offset - Google Patents

Procédé pour la modification par l'enlèvement de supports en aluminium décapés par voie électrochimique et l'utilisation de ceux-ci pour la fabrication des plaques offset Download PDF

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Publication number
EP0097301A1
EP0097301A1 EP83105774A EP83105774A EP0097301A1 EP 0097301 A1 EP0097301 A1 EP 0097301A1 EP 83105774 A EP83105774 A EP 83105774A EP 83105774 A EP83105774 A EP 83105774A EP 0097301 A1 EP0097301 A1 EP 0097301A1
Authority
EP
European Patent Office
Prior art keywords
aluminum
aqueous electrolyte
roughened
acid
printing
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.)
Granted
Application number
EP83105774A
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German (de)
English (en)
Other versions
EP0097301B1 (fr
Inventor
Werner Dr. Dipl.-Chem Frass
Dieter Dr. Dipl.-Chem. Mohr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Priority to AT83105774T priority Critical patent/ATE18443T1/de
Publication of EP0097301A1 publication Critical patent/EP0097301A1/fr
Application granted granted Critical
Publication of EP0097301B1 publication Critical patent/EP0097301B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • Y10S204/08—AC plus DC

Definitions

  • the invention relates to a method for the electrochemical modification of printing plate support materials based on aluminum or its alloys, which have already been roughened electrochemically, and the use of the material thus modified in the production of offset printing plates.
  • Carrier materials for offset printing plates are provided either by the consumer directly or by the manufacturer of precoated printing plates on one or both sides with a radiation (light) sensitive layer (copying or reproduction layer), with the help of which a printing image (printing form) is generated photomechanically.
  • the substrate carries the printing image areas and at the same time forms the hydrophilic image background for the lithographic printing process in the non-image areas (non-image areas).
  • the carrier material is roughened mechanically before the electrochemical roughening and the surface roughened in this way is also removed with an aqueous acid or base.
  • a printing plate made from this carrier material is said to have a long printing life, a high resistance to staining in the non-image areas and a uniform roughening structure.
  • the support material is still cathodic between the stage of electrochemical roughening in aqueous hydrochloric acid and the stage of anodic oxidation in aqueous sulfuric acid modified (purified) in aqueous sulfuric acid.
  • the process should primarily be suitable for continuous process control and lead to a very clean surface.
  • the aluminum can be roughened in a cathodic circuit with direct current of 70 to 150 A / dm 2 for 30 to 60 seconds, a silvery matt surface being formed; in this variant, only alkali salts are used.
  • the chemical or electrochemical modification of electrochemically roughened printing plate support materials in aqueous acids does show a good cleaning effect on surfaces treated with it, but there is no significant reduction in the fountain solution requirement of printing forms produced therewith, moreover, this type of treatment can occasionally also have a negative influence on the print run to be watched.
  • the chemical modification of electrochemically roughened printing plate support materials in aqueous-alkaline solutions can often meet the practical requirements for a printing form outlined above, but it has some procedural disadvantages.
  • the object of the present invention is therefore to propose a process for the production of printing plate carrier materials which leads to modified surfaces which are distinguished by improved "water flow” and less abrasion during printing, without the adhesion of the copying layer being adversely affected.
  • the invention is based on the known method for the electrochemical modification of at least one surface of electrochemically roughened printing plate supports Germ materials based on aluminum or its alloys in an aqueous electrolyte with switching of the roughened material as the cathode.
  • the process according to the invention is then characterized in that, as an electrochemical modification, an area removal of 0.1 to 10 g / m 2 is carried out in an aqueous electrolyte with a pH of 3 to 11, the at least one water-soluble salt in a concentration of 5 g / 1 contains up to its saturation limit.
  • the electrolyte has a pH of 5 to 9, an area removal of 0.5 to 5 g / '12 is carried out, and the electrolyte contains at least one water-soluble salt in a concentration of 10 to 250 g / l.
  • the process conditions are expediently chosen so that the electrochemical modification with direct current has a current density of 3 to 100 A / dm 2 , in particular 10 to 80 A / dm 2 , at a temperature of 15 to 90 ° C., in particular 20 to 40 ° C, and is carried out for 5 to 90 sec, in particular 10 to 60 sec; the corresponding voltage is 5 to 60 V, in particular 10 to 40 V.
  • Removal values between 0.1 and 0.5 g / m 2 can already lead to certain surface improvements, but are generally still insufficiently effective. Removal values of more than 5 g / m 2 may already be too high under certain circumstances, this applies in particular if the previous roughening was carried out rather flat, ie with relatively low roughness depths.
  • the process can be carried out batchwise, but it is preferably operated continuously in a modern belt system.
  • aqueous solutions of the salts mentioned above are preferably used as the electrolyte without any addition of acids or bases. Care should be taken, however, that when using salts whose aqueous solutions differ greatly in pH from the neutral point, the pH, if possible, with an acid containing the corresponding anion or with a base containing the corresponding cation of the electrolyte is set to a value around the neutral point (see the pH value ranges given above).
  • electrolytes are preferred such salts are used which have a good conductivity in low concentration and whose aqueous solutions already have a pH near the neutral point.
  • the process according to the invention partially removes the pore walls of the pores (cells) formed by the previous electrochemical roughening and that micropores form at the bottom of the cells; This influence on the topography should result in a less jagged surface.
  • the structure of the surface is to be clearly distinguished from such that by roughening stage in an aqueous electrolyte we generated, the aufwe a pH in the neutral range st h.
  • the process of cathodic modification of already electrochemically roughened aluminum surfaces may be primarily determined by the electrical conditions (current density or voltage) in connection with the duration of the treatment (amount of charge flowed). All other adjustable process parameters such as temperature, type of salt or electrolyte concentration only have an indirect effect under this condition by influencing the electrical conductivity.
  • the process parameters in the roughening stage are in the following ranges: the temperature of the electrolyte between 20 and 60 ° C., the active ingredient (acid, Salt) concentration between 5 and 100 g / 1 (even higher for salts), the current density between 15 and 130 A / dm 2 , the residence time between 10 and 100 sec and the electrolyte flow rate on the surface of the workpiece to be treated between 5 and 100 cm / sec;
  • AC is usually used as the type of current, but modified types of current such as AC with different amplitudes of the current strength are also possible for the anode and cathode currents.
  • the average roughness depth R of the roughened surface is in the range from about 1 to 15 / um, in particular in the range from 3 to 8 / um.
  • the roughness depth is determined in accordance with DIN 4768 in the version from October 1970, the roughness depth R is then the arithmetic mean of the individual roughness depths of five adjacent individual measuring sections.
  • the individual roughness depth is defined as the distance between two parallels to the middle line that touch the roughness profile at the highest or lowest point within the individual measurement sections.
  • the individual measuring section is the fifth part of the length of the part of the roughness profile which is used directly for evaluation and is projected perpendicularly onto the middle line.
  • the middle line is the line parallel to the general direction of the roughness profile from the shape of the geometrically ideal profile, which divides the roughness profile in such a way that the sum of the material-filled areas above it and the material-free areas below it are equal.
  • Direct current is preferably used for the anodic oxidation, but alternating current or a combination of these types of current (eg direct current with superimposed alternating current) can also be used.
  • the layer weights of aluminum oxide range from 1 to 10 g / m 2 , corresponding to a layer thickness of about 0.3 to 3.0 / um.
  • the variant of the method according to the invention with the step of anodic oxidation of the printing plate carrier aluminum materials can also be recreated in one or more post-treatment stages.
  • These post-treatment stages serve in particular to further increase the hydrophilicity of the aluminum oxide layer, which is already sufficient for many areas of application, the remaining known properties of this layer being at least retained.
  • Negative-working condensation products from aromatic diazonium salts and compounds with active carbonyl groups preferably condensation products from diphenylamine diazonium salts and formaldehyde, which are described, for example, in DE-PS 596 731, 1 138 399, 1 138 400, 1 138 401, 1 142 871, 1 154 123, U.S. Patents 2,679,498 and 3,050,502 and British Pat. No. 712,606.
  • Negative-working mixed condensation products of aromatic diazonium compounds for example according to DE-OS 20 24 244.
  • Positive-working layers according to DE-OS 26 10 842, DE-PS 27 18 254 or DE-OS 29 28 636, which is a compound that splits off when irradiated, a monomeric or polymeric compound that has at least one COC that can be split off by acid Group (e.g. an orthocarboxylic acid ester group or a carboxylic acid amide acetal group) and optionally contain a binder.
  • acid Group e.g. an orthocarboxylic acid ester group or a carboxylic acid amide acetal group
  • optionally contain a binder e.g. an orthocarboxylic acid ester group or a carboxylic acid amide acetal group
  • Negative working layers made of photopolymerizable monomers, photoinitiators, binders and optionally other additives.
  • the monomers used are for example, acrylic and methacrylic acid esters or reaction products of diisocyanates with partial esters of polyhydric alcohols, as described, for example, in US Pat. Nos. 2,760,863 and 3,060,023 and DE-OSes 20 64 079 and 23 61 041.
  • Negative working layers according to DE-OS 30 36 077 which contain a diazonium salt polycondensation product or an organic azido compound as a photosensitive compound and a high molecular weight polymer with pendant alkenylsulfonyl or cycloalkenylsulfonylurethane groups as a binder.
  • photoconductive layers such as z. B. in DE-PS 11 17 391, 15 22 497, 15 72 312, 23 22 046 and 23 22 047 are described, applied to the carrier materials produced according to the invention, whereby highly light-sensitive, electrophotographic printing plates are formed.
  • Percentages in the following examples are based on weight, parts by weight to parts by volume are in the same ratio as kg to 1.
  • the following standard methods are used to assess the carrier materials produced by the process according to the invention:
  • the application amount of the dampening water is indicated by an An pointing device in a dampening system from Dahlgren determined. It is not an absolute measure of the fountain solution consumption, but the details of this device can be compared with one another in scale parts from different printing runs (relative measures).
  • the printing forms produced from carrier materials modified cathodically by the process according to the invention are printed in a printing press in addition to printing forms produced from appropriately roughened and anodized carrier materials without this modification stage.
  • the two plates are then compared with regard to the adhesion of the layer and shiny spots (signs of abrasion) in the non-image areas.
  • the removal that occurs due to the cathodic modification on the aluminum support is determined gravimetrically. To do this, electrochemically roughened aluminum sheets in 100 x 100 mm format are weighed before the cathodic treatment. After the treatment according to the invention and rinsing and drying of the samples, the removal is determined by reweighing.
  • a 0.3 mm thick bright rolled aluminum foil is included an aqueous solution of NaOH and A 1 3 + ions (used as sodium aluminate) degreased and pre-pickled at about 80 ° C for 8 sec. After an acidic intermediate wash (pickling), the surface of the aluminum foil is in an aqueous solution with an Al (NO 3 ) 3 content. 9 H 2 0 and HN0 3 roughened at a temperature of 40 to 45 ° C under the influence of alternating current, a current density of 45 A / dm 2 with strong bath circulation to a roughness depth R z of about 7 ⁇ m.
  • the aluminum foil After interposing a wash with water, the aluminum foil is switched as a cathode in an aqueous electrolyte with a content of 50 g / 1 of NaN0 3 and a p-value of 6.8 for 30 seconds with direct current with a current density of 29 A / dm 2 and treated with a voltage of 25 V at a temperature of 30 ° C; this removes 2.28 g / m 2 from the surface.
  • the aluminum foil After a further intermediate wash, the aluminum foil is in an aqueous anodizing bath containing H 2 S0 4 and Al 3+ ions [used as Al 2 (SO 4 ) 3 ] at 40 ° C. by direct current exposure to a current density of 14 A / dm 2 during Anodized for 25 seconds. The film is then washed with water and dried.
  • More than 200,000 prints of good quality can be produced from the printing form produced in this way.
  • the printing behavior is very good. Even when the dampening solution is used sparingly, the plate does not tend to accept ink in the non-image areas ("toning").
  • the printing form consumes about 10 to 15% less fountain solution than a comparative printing form (V1), the carrier material between which roughened and the anodic oxidation is not treated cathodically, but is otherwise equivalent. While the reproduction layer is still well preserved in both printing forms, the film of the comparative example shows glossy areas in the non-image areas after approximately 150,000 to 170,000 prints, which indicates mechanical abrasion. In contrast, the plate produced according to the invention shows no signs of wear on the carrier material even after 200,000 prints.
  • the printing form produced in this way delivers more than 150,000 prints of good quality in a sheetfed offset printing machine.
  • the printing form produced according to this example consumes about 20% less fountain solution and also shows after 150,000 Do not print any traces of mechanical damage to the substrate surface in the non-image areas.
  • a 0.3 mm thick bright aluminum foil is degreased with an aqueous solution of NaOH content at a temperature of about 80 ° C for 10 seconds and cleaned. After rinsing with water, the mixture is pickled acidic and, according to the information in Example 1, roughened electrochemically to a roughness depth R z of about 3 pm. The surface is then cathodically treated in an aqueous electrolyte with a content of 50 g / l of NaC10 3 . At a DC voltage of 25 V and a current density of 15 A / dm 2 , about 0.9 g / m 2 of the aluminum surface is removed in 20 seconds. This creates a surface with a very uniform roughening structure.
  • Example 1 Larger depressions resulting from the electrochemical roughening step disappear almost completely through the cathodic treatment according to the invention.
  • the washed, acid-pickled and rewashed film receives an anodically produced in sulfuric acid as described in Example 2 Oxide layer and is treated with an aqueous polyvinylphosphonic acid solution, the radiation-sensitive coating is carried out as indicated in Example 1.
  • the printing form produced according to this example requires approximately 7% less fountain solution to prevent the non-image areas (toning) from accepting color when printing.
  • the layer is negatively charged to about 400 V in the dark by means of a corona, exposed imagewise in a repro camera and then developed (emphasized) with an electrophotographic suspension developer, which is obtained by dispersing 3.0 parts by weight of magnesium sulfate in a solution of 7.5 Parts by weight of pentaerythritol resin ester in 1200 parts by volume of an isoparaffin mixture with a boiling range of 185 to 210 ° C is produced. After removing the excess developer liquid, the developer is fixed and the plate in a solution of 35 parts by weight of sodium metasilicate 9 H 0, 140 parts by weight of glycerol, 560 parts by weight of ethylene glycol and 140 parts by weight of ethanol for 60 seconds
  • the plate is then rinsed off with a powerful jet of water, removing the areas of the photoconductor layer not covered with toner. The plate is then ready for printing.

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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)
  • Cell Electrode Carriers And Collectors (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP83105774A 1982-06-19 1983-06-13 Procédé pour la modification par l'enlèvement de supports en aluminium décapés par voie électrochimique et l'utilisation de ceux-ci pour la fabrication des plaques offset Expired EP0097301B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105774T ATE18443T1 (de) 1982-06-19 1983-06-13 Verfahren zur abtragenden modifizierung von elektrochemisch aufgerauhten traegermaterialien aus aluminium und deren verwendung bei der herstellung von offsetdruckplatten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3222967 1980-06-19
DE19823222967 DE3222967A1 (de) 1982-06-19 1982-06-19 Verfahren zur abtragenden modifizierung von elektrochemisch aufgerauhten traegermaterialien aus aluminium nd deren verwendung bei der herstellung von offsetdruckplatten

Publications (2)

Publication Number Publication Date
EP0097301A1 true EP0097301A1 (fr) 1984-01-04
EP0097301B1 EP0097301B1 (fr) 1986-03-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105774A Expired EP0097301B1 (fr) 1982-06-19 1983-06-13 Procédé pour la modification par l'enlèvement de supports en aluminium décapés par voie électrochimique et l'utilisation de ceux-ci pour la fabrication des plaques offset

Country Status (9)

Country Link
US (1) US4482444A (fr)
EP (1) EP0097301B1 (fr)
JP (1) JPS5911295A (fr)
AT (1) ATE18443T1 (fr)
AU (1) AU554721B2 (fr)
BR (1) BR8303241A (fr)
CA (1) CA1199004A (fr)
DE (2) DE3222967A1 (fr)
ZA (1) ZA833989B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0268790A3 (en) * 1986-10-17 1989-07-19 Hoechst Aktiengesellschaft Process for the electrochemically modifying support materials of aluminum or aluminum alloys, which have been grained in a multi-stage process and use of these materials in the manufacture of offset-printing plates
EP0278766A3 (en) * 1987-02-13 1990-06-13 Vickers Plc Improvements in or relating to printing plate precursors
CN104630872A (zh) * 2015-02-27 2015-05-20 深圳市梦之坊通信产品有限公司 铝合金表面纳米孔处理方法、及与塑胶结合的方法

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686017A (en) * 1981-11-05 1987-08-11 Union Oil Co. Of California Electrolytic bath and methods of use
JPH0695233B2 (ja) * 1984-09-11 1994-11-24 コニカ株式会社 印刷用原版
US4755265A (en) * 1985-06-28 1988-07-05 Union Oil Company Of California Processes for the deposition or removal of metals
US4801511A (en) * 1985-06-28 1989-01-31 Union Oil Company Of California Battery cell electrolyte
JP2520694B2 (ja) * 1988-06-06 1996-07-31 富士写真フイルム株式会社 平版印刷版用支持体
US5152877A (en) * 1989-10-13 1992-10-06 Fuji Photo Film Co., Ltd. Method for producing support for printing plate
US5342784A (en) * 1991-04-12 1994-08-30 Mitsubishi Paper Mills Limited Electrophotographic lithographic printing plate
EP1046514B1 (fr) * 1999-04-22 2005-07-06 Fuji Photo Film Co., Ltd. Procédé de fabrication d'un support en aluminium pour plaque d'impression lithographique
US6716569B2 (en) * 2000-07-07 2004-04-06 Fuji Photo Film Co., Ltd. Preparation method for lithographic printing plate
US7299749B2 (en) * 2003-02-10 2007-11-27 Fujifilm Corporation Lithographic printing plate support and production method thereof
US20050247224A1 (en) * 2004-05-10 2005-11-10 Xante Corporation Computer-to-conductive anodized and grained plate platesetting system and apparatus
ES2430562T3 (es) * 2008-03-04 2013-11-21 Agfa Graphics N.V. Método para la fabricación de un soporte de una plancha de impresión litográfica

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3160506A (en) * 1962-10-19 1964-12-08 Polychrome Corp Planographic printing plate and method for preparing same
DE2557222A1 (de) * 1974-10-02 1977-06-30 Polychrome Corp Verfahren zur herstellung eines aluminiumtraegerbogens fuer druckplatten
DE3009103A1 (de) * 1980-03-10 1981-09-24 Hoechst Ag, 6000 Frankfurt Verfahren zur modifizierung der oberflaeche von druckplatten-traegermaterialien aus aluminium und verfahren zur herstellung von druckplatten aus diesen materialien
DE3127329A1 (de) * 1980-07-18 1982-05-06 Mitsubishi Chemical Industries, Ltd., Tokyo Verfahren zur herstellung von lithographischen druckplattentraegern

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DE2250275A1 (de) * 1972-10-13 1974-04-25 Oce Van Der Grinten Nv Verfahren zur elektrochemischen behandlung von aluminium zur herstellung lithographischer druckplatten
US3865700A (en) * 1973-05-18 1975-02-11 Fromson H A Process and apparatus for continuously anodizing aluminum
US3929591A (en) * 1974-08-26 1975-12-30 Polychrome Corp Novel lithographic plate and method
DE2537724C3 (de) * 1975-08-25 1981-02-26 Hoechst Ag, 6000 Frankfurt Verwendung eines Verfahrens zum elektrochemischen Aufrauhen von Aluminium bei der Herstellung von Flachdruckplattenträgern
DE2537725C3 (de) * 1975-08-25 1981-02-19 Hoechst Ag, 6000 Frankfurt Verwendung eines Verfahrens zum elektrochemischen Aufrauhen von Aluminium bei der Herstellung von Flachdruckplattenträgern
JPS5615396A (en) * 1979-07-19 1981-02-14 Fuji Photo Film Co Ltd Manufacture of alminum support substance for lithographic plate
US4324841A (en) * 1979-08-24 1982-04-13 Polychrome Corporation Lithographic substrates
US4242417A (en) * 1979-08-24 1980-12-30 Polychrome Corporation Lithographic substrates
JPS5647041A (en) * 1979-09-27 1981-04-28 Fuji Photo Film Co Ltd Production of positive type photosensitive lithographic printing plate
US4437955A (en) * 1983-07-05 1984-03-20 U.S. Philips Corporation Combined AC and DC etching of aluminum foil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160506A (en) * 1962-10-19 1964-12-08 Polychrome Corp Planographic printing plate and method for preparing same
DE2557222A1 (de) * 1974-10-02 1977-06-30 Polychrome Corp Verfahren zur herstellung eines aluminiumtraegerbogens fuer druckplatten
DE3009103A1 (de) * 1980-03-10 1981-09-24 Hoechst Ag, 6000 Frankfurt Verfahren zur modifizierung der oberflaeche von druckplatten-traegermaterialien aus aluminium und verfahren zur herstellung von druckplatten aus diesen materialien
DE3127329A1 (de) * 1980-07-18 1982-05-06 Mitsubishi Chemical Industries, Ltd., Tokyo Verfahren zur herstellung von lithographischen druckplattentraegern

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0268790A3 (en) * 1986-10-17 1989-07-19 Hoechst Aktiengesellschaft Process for the electrochemically modifying support materials of aluminum or aluminum alloys, which have been grained in a multi-stage process and use of these materials in the manufacture of offset-printing plates
EP0278766A3 (en) * 1987-02-13 1990-06-13 Vickers Plc Improvements in or relating to printing plate precursors
CN104630872A (zh) * 2015-02-27 2015-05-20 深圳市梦之坊通信产品有限公司 铝合金表面纳米孔处理方法、及与塑胶结合的方法

Also Published As

Publication number Publication date
DE3222967A1 (de) 1983-12-22
ZA833989B (en) 1984-02-29
EP0097301B1 (fr) 1986-03-05
JPH0249639B2 (fr) 1990-10-30
JPS5911295A (ja) 1984-01-20
DE3362414D1 (en) 1986-04-10
AU1587283A (en) 1983-12-22
CA1199004A (fr) 1986-01-07
US4482444A (en) 1984-11-13
AU554721B2 (en) 1986-08-28
ATE18443T1 (de) 1986-03-15
BR8303241A (pt) 1984-01-31

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