EP0097301B1 - Verfahren zur abtragenden Modifizierung von elektrochemisch aufgerauhten Trägermaterialien aus Aluminium und deren Verwendung bei der Herstellung von Offsetdruckplatten - Google Patents

Verfahren zur abtragenden Modifizierung von elektrochemisch aufgerauhten Trägermaterialien aus Aluminium und deren Verwendung bei der Herstellung von Offsetdruckplatten Download PDF

Info

Publication number
EP0097301B1
EP0097301B1 EP83105774A EP83105774A EP0097301B1 EP 0097301 B1 EP0097301 B1 EP 0097301B1 EP 83105774 A EP83105774 A EP 83105774A EP 83105774 A EP83105774 A EP 83105774A EP 0097301 B1 EP0097301 B1 EP 0097301B1
Authority
EP
European Patent Office
Prior art keywords
aluminum
printing plates
aqueous electrolyte
roughened
support materials
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
Application number
EP83105774A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0097301A1 (de
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/de
Application granted granted Critical
Publication of EP0097301B1 publication Critical patent/EP0097301B1/de
Expired legal-status Critical Current

Links

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 (copy 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 exposed in the non-image areas must have a high affinity for water, i. H. be highly hydrophilic in order to absorb water quickly and permanently during the lithographic printing process and to be sufficiently repellent to the bold printing ink.
  • the adhesion of the photosensitive layer before or the printing parts of the layer after exposure must be sufficient.
  • the carrier material is said to have good mechanical resistance, e.g. B. against abrasion and good chemical resistance, especially to alkaline media.
  • the water required for printing should be as low as possible, for example to prevent the paper from over-moistening, as otherwise there would be «registration difficulties with multicolor printing (i.e. the second or third color can no longer be printed congruently on the first color) or paper web breaks in web offset can.
  • 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 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 carrier materials based on aluminum or its alloys in an aqueous electrolyte with the roughened material switched 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 9, which contains at least one water-soluble salt in a concentration of 5 g / l contains up to its saturation limit.
  • the electrolyte has a pH of 5 to 9, an area removal of 0.5 to 5 g / m 2 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).
  • those salts are preferably used in the electrolyte which have good conductivity in low concentrations and whose aqueous solutions already have a pH value in the vicinity of 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 can be clearly distinguished from that which is produced by single-stage roughening in an aqueous electrolyte which has a pH value in the neutral range.
  • 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 uniform roughening structure without larger depressions results in a more precise control of the exposure and an improved resolution of the radiation-sensitive layer on the printing plates.
  • the electrolyte is as neutral as possible (based on its pH value)
  • the uncontrollable, purely chemical attack on the aluminum is presumably negligible, so that the modifying removal in broad temperature ranges can essentially be controlled via the electrical parameters and the treatment time. This opens up the possibility of modifying carrier materials for different areas of application in a targeted manner and without great effort.
  • the bath can be used for a very long time without any additions or cleaning operations, i. H. it has a long service life.
  • the average roughness depth R z of the roughened surface is in the range from about 1 to 15 ⁇ m, in particular in the range from 3 to 8 ⁇ m.
  • the roughness depth is determined in accordance with DIN 4768 in the version from October 1970, the roughness depth R z 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 of 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.
  • the "hard anodising" is reacted with an aqueous H 2 S0 4 electrolyte containing a concentration of 166 g H 2 SO 4 / l (or 230 g of H 2 S0 4/1) at an operating temperature of 0 ° to 5 ° C, at a current density of 2 to 3 Aldm 2 , a rising voltage of about 25 to 30 V at the beginning and about 40 to 100 V towards the end of the treatment and for 30 to 200 min.
  • Direct current is preferably used for the anodic oxidation, however 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 microns.
  • the variant of the method according to the invention with the step of anodic oxidation of the printing plate support material made of aluminum can also be followed by one or more post-treatment steps.
  • These post-treatment stages serve in particular to additionally 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 GB Patent 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 which splits off when irradiated, a monomeric or polymeric compound which passes through at least one Has acid-releasable COC group (z. B. an orthocarboxylic acid ester group or a carboxylic acid amidacetal group) and optionally contain a binder.
  • Negative-working layers made of photopolymerizable monomers, photoinitiators, binders and optionally other additives.
  • the monomers used here 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-OSen 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-PSen-11 17 391, 15 22 497, 1572312, 2322046 and 2322047 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 I.
  • the following standard methods are used to assess the carrier materials produced by the process according to the invention:
  • the application quantity of the dampening water is determined by a display device in a dampening unit from Dahlgren. 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 machine in addition to printing forms produced from appropriately roughened and anodized carrier materials without this modification stage. At certain intervals, 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. For this purpose, 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 bare aluminum foil is degreased with an aqueous solution containing NaOH and Al 3 + ions (used as sodium aluminate) at about 80 ° C. for 8 seconds and pre-pickled. After an acidic intermediate wash (pickling), the surface of the aluminum foil is dissolved in an aqueous solution containing Al (NO 3 ) 3 .9 H 2 O and HNO 3 at a temperature of 40 to 45 ° C under the influence of AC current at a current density of 45 A / dm 2 roughened 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 / l of NaNO 3 and a pH 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 SO 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.
  • the printing form produced in this way can produce more than 200,000 prints of good quality.
  • the printing behavior is very good.
  • the printing form consumes about 10 to 15% less fountain solution than a comparative printing form (V1), the carrier material of which is not treated cathodically abrasion between the roughening and the anodic oxidation, but is otherwise of equivalent construction.
  • V1 comparative printing form
  • 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.
  • 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 supplies more than 150,000 prints of good quality in a sheetfed offset printing press.
  • the printing plate produced according to this example consumes about 20% less fountain solution and shows no traces of mechanical damage to the carrier surface in the non-image areas even after 150,000 prints.
  • a 0.3 mm thick rolled aluminum foil is degreased with an aqueous solution containing NaOH at a temperature of about 80 ° C. for 10 seconds and cleaned. After rinsing with water, the mixture is pickled acidically and, according to the instructions in Example 1, is roughened electrochemically to a roughness depth R z of approximately 3 ⁇ m. The surface is then cathodically treated in an aqueous electrolyte containing 50 g / l of NaC10 3 . At a DC voltage of 25 V and a current density of 15 Aldm 2 , about 0.9 g / m 2 of the aluminum surface are removed in 20 seconds. This creates a surface with a very uniform roughening structure.

Landscapes

  • 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 Verfahren zur abtragenden Modifizierung von elektrochemisch aufgerauhten Trägermaterialien aus Aluminium und deren Verwendung bei der Herstellung von Offsetdruckplatten Expired EP0097301B1 (de)

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 1982-06-19
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 EP0097301A1 (de) 1984-01-04
EP0097301B1 true EP0097301B1 (de) 1986-03-05

Family

ID=6166384

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105774A Expired EP0097301B1 (de) 1982-06-19 1983-06-13 Verfahren zur abtragenden Modifizierung von elektrochemisch aufgerauhten Trägermaterialien aus Aluminium und deren Verwendung bei der Herstellung von Offsetdruckplatten

Country Status (9)

Country Link
US (1) US4482444A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0097301B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5911295A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE18443T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU554721B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR8303241A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1199004A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3222967A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA833989B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (15)

* 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
DE3635303A1 (de) * 1986-10-17 1988-04-28 Hoechst Ag Verfahren zur abtragenden modifizierung von mehrstufig aufgerauhten traegermaterialien aus aluminium oder dessen legierungen und deren verwendung bei der herstellung von offsetdruckplatten
GB8703376D0 (en) * 1987-02-13 1987-03-18 Vickers Plc Printing plate precursors
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 (en) * 1999-04-22 2005-07-06 Fuji Photo Film Co., Ltd. Method for producing aluminium support for lithographic printing plate
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
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

Family Cites Families (14)

* 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
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
US3935080A (en) * 1974-10-02 1976-01-27 Polychrome Corporation Method of producing an aluminum base sheet for a printing plate
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
US4242417A (en) * 1979-08-24 1980-12-30 Polychrome Corporation Lithographic substrates
US4324841A (en) * 1979-08-24 1982-04-13 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
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
JPS5724294A (en) * 1980-07-18 1982-02-08 Mitsubishi Chem Ind Ltd Production of support for planographic printing plate
US4437955A (en) * 1983-07-05 1984-03-20 U.S. Philips Corporation Combined AC and DC etching of aluminum foil

Also Published As

Publication number Publication date
AU1587283A (en) 1983-12-22
US4482444A (en) 1984-11-13
AU554721B2 (en) 1986-08-28
CA1199004A (en) 1986-01-07
DE3362414D1 (en) 1986-04-10
JPH0249639B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-10-30
ATE18443T1 (de) 1986-03-15
EP0097301A1 (de) 1984-01-04
BR8303241A (pt) 1984-01-31
ZA833989B (en) 1984-02-29
JPS5911295A (ja) 1984-01-20
DE3222967A1 (de) 1983-12-22

Similar Documents

Publication Publication Date Title
EP0121880B1 (de) Zweistufiges Verfahren zur Herstellung von anodisch oxidierten flächigen Materialien aus Aluminium und deren Verwendung bei der Herstellung von Offsetdruckplatten
EP0008440B1 (de) Verfahren zur anodischen Oxidation von Aluminium und dessen Verwendung als Druckplatten-Trägermaterial
EP0268790B1 (de) Verfahren zur abtragenden Modifizierung von mehrstufig aufgerauhten Trägermaterialien aus Aluminium oder dessen Legierungen und deren Verwendung bei der Herstellung von Offsetdruckplatten
EP0105170B1 (de) Verfahren zur Nachbehandlung von Aluminiumoxidschichten mit Alkalisilikat enthaltenden wässrigen Lösungen und dessen Verwendung bei der Herstellung von Offsetdruckplattenträgern
EP0004569B1 (de) Verfahren zur anodischen Oxidation von Aluminium und dessen Verwendung als Druckplatten-Trägermaterial
EP0097301B1 (de) Verfahren zur abtragenden Modifizierung von elektrochemisch aufgerauhten Trägermaterialien aus Aluminium und deren Verwendung bei der Herstellung von Offsetdruckplatten
EP0069319B1 (de) Hydrophilierte Trägermaterialien für Offsetdruckplatten, ein Verfahren zu ihrer Herstellung und ihre Verwendung
EP0069320A1 (de) Hydrophilierte Trägermaterialien für Offsetdruckplatten, ein Verfahren zu ihrer Herstellung und ihre Verwendung
DE3030815A1 (de) Elektrolytisches koernungsverfahren
EP0149833A2 (de) Verfahren zur elektrochemischen Aufrauhung von Aluminium für Druckplattenträger in einem wässrigen Mischelektrolyten
EP0093961B1 (de) Verfahren zur elektrochemischen Aufrauhung von Aluminium für Druckplattenträger
EP0086957B1 (de) Verfahren zur Herstellung von Trägermaterialien für Offsetdruckplatten
EP0086956B1 (de) Verfahren zur Herstellung von Trägermaterialien für Offsetdruckplatten
EP0139111B1 (de) Verfahren zur zweistufigen anodischen Oxidation von Trägermaterialien aus Alumunium für Offsetdruckplatten
EP0141056B1 (de) Verfahren zur einstufigen anodischen Oxidation von Trägermaterialien aus Aluminium für Offsetdruckplatten
KR930005014B1 (ko) 인쇄판 지지체용 알루미늄의 전기화학적 조면화 처리방법
EP0161461B1 (de) Verfahren zur anodischen Oxidation von Aluminium und dessen Verwendung als Trägermaterial für Offsetdruckplatten
EP0468313B1 (de) Platten-, folien- oder bandförmiges Trägermaterial für Offsetdruckplatten, Verfahren zu seiner Herstellung und seine Verwendung
DE3637764A1 (de) Traegermaterial auf der basis von aluminium oder dessen legierungen fuer offsetdruckplatten sowie verfahren zu dessen herstellung
EP0190643A2 (de) Hydrophilierte Trägermaterialien für Offsetdruckplatten, ein Verfahren zu ihrer Herstellung und ihre Verwendung
EP0170045B1 (de) Verfahren zum gleichzeitigen Aufrauhen und Verchromen von Stahlplatten als Träger für lithographische Anwendungen
EP0095581B1 (de) Verfahren zur Nachbehandlung von Aluminiumoxidschichten mit Alkalisilikat enthaltenden wässrigen Lösungen und dessen Verwendung bei der Herstellung von Offsetdruckplattenträgern
DE3312496A1 (de) Verfahren zur elektrochemischen aufrauhung und anodischen oxidation von aluminium und dessen verwendung als traegermaterial fuer offsetdruckplatten
EP0035730A2 (de) Verfahren zur Modifizierung der Oberfläche von Druckplatten-Trägermaterialien aus Aluminium und Verfahren zur Herstellung von Druckplatten aus diesen Materialien
EP0167087A1 (de) Verfahren zur elektrochemischen Aufrauhung von Stahlplatten zur Verwendung als Offsetdruckplattenträger sowie eine für das Verfahren geeignete Elektrolytlösung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19840530

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 18443

Country of ref document: AT

Date of ref document: 19860315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3362414

Country of ref document: DE

Date of ref document: 19860410

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19860522

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19860630

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19870613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19880101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19880614

BERE Be: lapsed

Owner name: HOECHST A.G.

Effective date: 19880630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19890630

Ref country code: CH

Effective date: 19890630

Ref country code: BE

Effective date: 19890630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910517

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930226

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83105774.0

Effective date: 19890220

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980518

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980718

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990613

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000503