EP0418575A2 - Procédé pour la fabrication de plaques, feuilles ou matériaux sous forme de bandes, et procédé pour la fabrication de plaques lithographiques présensibilisées - Google Patents

Procédé pour la fabrication de plaques, feuilles ou matériaux sous forme de bandes, et procédé pour la fabrication de plaques lithographiques présensibilisées Download PDF

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Publication number
EP0418575A2
EP0418575A2 EP90116032A EP90116032A EP0418575A2 EP 0418575 A2 EP0418575 A2 EP 0418575A2 EP 90116032 A EP90116032 A EP 90116032A EP 90116032 A EP90116032 A EP 90116032A EP 0418575 A2 EP0418575 A2 EP 0418575A2
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EP
European Patent Office
Prior art keywords
carbon atoms
aqueous solution
hydrolyzate
silane
condensate
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.)
Withdrawn
Application number
EP90116032A
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German (de)
English (en)
Other versions
EP0418575A3 (en
Inventor
Harald Dr. Lauke
Gregor Dr. Schuermann
Hartmut Dr. Sandig
Thomas Dr. Loerzer
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BASF SE
Original Assignee
BASF SE
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Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP0418575A2 publication Critical patent/EP0418575A2/fr
Publication of EP0418575A3 publication Critical patent/EP0418575A3/de
Withdrawn legal-status Critical Current

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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
    • 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 invention relates to a process for the production of plate, film or tape-shaped materials based on roughened and anodically oxidized aluminum or one of its alloys, the aluminum oxide layers of which with an aqueous solution of a silane hydrolyzate and / or condensate, which is a further addition contains, are treated.
  • the invention also relates to a process for the production of sensitized planographic printing plates by post-treatment of mechanically, chemically and / or electrochemically roughened and anodically oxidized aluminum substrates and their use as offset printing plates.
  • Offset printing plates generally consist of a layer support, on which a radiation-sensitive reproduction layer is applied, with the aid of which an image is photomechanically generated from a template. After the printing form has been produced, the layer support carries the color-bearing image areas during later printing and at the same time forms the water-bearing image background (non-image areas) in the image-free areas.
  • the substrate which is to be suitable for light-sensitive material for producing a printing form, on the one hand that the printing image areas developed from the copying layer of the material adhere very firmly to it, and on the other hand that it represents a hydrophilic background and its repellent effect compared to oleophilic printing inks under the requirements of the printing process. Therefore, the substrate must always have a certain porous surface structure so that its surface can retain enough water to be sufficiently repellent to the printing ink used in printing.
  • Aluminum, steel, copper, brass or zinc foils can be used as the carrier material for light-sensitive layers.
  • aluminum is roughened mechanically, chemically and / or electrochemically, if necessary pickled and anodized.
  • electrochemical roughening in HCl and / or HNO3 as well as the anodic oxidation in H2SO4 and / or H3PO4 as standard methods.
  • complex fluorides cf. for example DE-A-1 300 415, DE-A-1 796 159, GB-A-1 128 506 and US-A-3 440 050
  • Zr, Hf or Ti for example of Zr, Hf or Ti
  • K2ZrF6 and sodium silicate see, for example, DE-A-28 10 309
  • polyvinylphosphonic acid for the aftertreatment leads to good printing properties of the printing plates, but the deposition of the polyvinylphosphonic acid on the support material can lead to production difficulties, such as the formation of an extremely sparingly soluble precipitate by reaction with Al3+ ions, which leads to wetting difficulties or to layer breakouts leads when printing.
  • Hydrolysates of special silanes bearing hydrophilic end groups as described in DE-A-36 27 757, DE-A-36 27 758 and EP-A-0 256 256, EP-A-0 256 255 and US-A-4 782 000 are described, are suitable to avoid the disadvantages mentioned above.
  • silanes are used for the aftertreatment of offset carriers, the printing plates made from them are characterized by excellent storage stability.
  • the person skilled in the art is aware that in some cases the hydrophilicity is increased to such an extent that the processing latitude of the printing plates when developing with aqueous / alkaline developers can only be very narrow, since, for example, the developer resistance of the image-carrying parts is reduced so that the finest structures depicted in particular can be detached during development.
  • the present invention relates to a process for the production of plate, film or tape-shaped materials based on mechanically, chemically and / or electrochemically roughened and anodically oxidized aluminum or aluminum alloy, the aluminum oxide layers of which are mixed with an aqueous solution of a hydrolyzate and / or condensate at least one silane of the general formula (I) X- (CH2) y -Si (R1) n (OR2) 3-n (I), wherein R1 and R2 are the same or different and are alkyl radicals having 1 to 9 carbon atoms or aryl radicals having 6 to 12 carbon atoms and X is one of the radicals stands for R3 for hydrogen, an alkyl radical with 1 to 9 carbon atoms, a carboxylic acid radical with 1 to 9 carbon atoms or one of this carboxylic acid radical and that bound to R3 HO- - H rest formed carboxylic acid anhydride ring, R4 and R5 are the same or different from each other and represent an al
  • the aqueous solution used according to the invention for the treatment of the aluminum oxide layers preferably has a pH of 1.5 to 6.0.
  • the treatment with the aqueous solution is preferably carried out within 5 to 120 seconds at temperatures of 10 to 90 ° C., the aqueous solution used for the treatment being 0.5 to 100 g / l of a hydrolyzate and / or condensate of at least one silane contains general formula (I) and 0.1 to 50 g / l of at least one compound of general formula (II) or (III).
  • M in the general formula (II) or (III) preferably represents Na or K.
  • K2ZrF6 is particularly preferred as an additive to the aqueous solution of the silane hydrolyzate and / or condensate.
  • the present invention also relates to a process for the production of sensitized planographic printing plates or offset printing plates from a support and a light-sensitive copying layer which is applied to this support, the supports to be used for this being aftertreated by the process according to the invention before coating with the light-sensitive copying layer.
  • the aluminum supports (aluminum or aluminum alloys) to be used for the process according to the invention are mechanically, chemically and / or electrochemically pretreated and anodized in the usual way.
  • the aluminum (alloy) support pretreated as indicated above is aftertreated by customary application methods such as spraying or dipping, an excess is removed, if appropriate, by rinsing with water and, before coating with the light-sensitive copying layer, generally at a temperature of 50 to 120 ° C dried.
  • the hydrolyzate or condensate of the silane is expediently used in aqueous or alcoholic solution and can be prepared in a customary manner by, if appropriate acid-catalyzed, hydrolysis from the underlying silanes of the general formula (I).
  • silanes of the general formula (I) are used for the process according to the invention, X- (CH2) y -Si (R1) n (OR2) 3-n (I) wherein R1 and R2 are the same or different from each other and for alkyl radicals with 1 to 9, preferably 1 to 4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl radicals or for aryl radicals with 6 to 12 carbon atoms, such as phenyl -, Benzyl or methylphenyl radicals are and X represents one of the radicals R3 is hydrogen, an alkyl radical with 1 to 9, preferably 1 to 5 carbon atoms, for example methyl, ethyl, propyl or butyl radical, a carboxylic acid radical with 1 to 9, preferably 1 to 4 carbon atoms, for example -COOH, - CH2COOH, -C2H4-COOH,
  • silanes are (3-trimethoxysilylpropyl) carboxylic acid, (3-triethoxysilylpropyl) succinic anhydride, (2-trimethoxysilylethyl) dimethylphosphonate, (2-triethoxysilylethyl) diethyl phosphonate, (3-triethoxysilylpropyl) diethyl phosphonate, (2-trimethoxysilylethyl) phosphonic acid and (2-trimethoxysilylethyl) phosphonic acid dichloride.
  • Silanes are particularly preferred (3-triethoxysilylpropyl) succinic anhydride, (2-Trimethoxysilylethyl) dimethyl phosphonic acid and (2-triethoxysilylethyl) diethylphosphonate.
  • hydrolysis of such silanes can be carried out in a conventional manner by dissolving the silane in water, if appropriate in the presence of acids, in aqueous solutions of alcohols or in concentrated mineral acids, such as e.g. HCl done.
  • condensates can also form during hydrolysis.
  • hydrolyzates and condensates as well as mixtures of hydrolyzates and condensates of the abovementioned silanes are suitable for the process according to the invention, as long as it is ensured that the hydrolysates or condensates are completely dissolved in the aqueous or alcoholic solution.
  • fluorides of the general formulas (II) and (III) are sodium fluoride, potassium fluoride, sodium hexafluorozirconate, potassium hexafluorozirconate, sodium hexafluorotitanate, potassium hexafluorotitanate and Na2SiF6 (sodium hexafluorosilicate).
  • Particularly preferred fluorides are sodium fluoride and potassium hexafluorozirconate.
  • the fluorides of the general formula (II) and / or (III) are generally in amounts of 0.01 to 5, preferably 0.05 to 2% by weight, the silane hydrolyzates in amounts from 0.05 to 10, preferably 0.1 to 4 wt .-% contain.
  • the pH of these aqueous solutions is preferably in the range from pH 1.5 to 6, in particular at pH 2 to 4.
  • the pH can be brought to the desired value by adding suitable substances.
  • the aftertreatment of the aluminum supports with the aqueous solutions according to the invention is preferably carried out at temperatures of 10 to 90, in particular 20 to 70 ° C.
  • the duration of the treatment is preferably between 5 to 120, in particular 10 to 60 seconds.
  • the post-treated aluminum support After the treatment according to the invention of the pretreated aluminum support with the solution of the mixture of hydrolyzate or condensate of the silane and the fluorine compound of the formula (II) and / or (III) and drying the thin layer, the post-treated aluminum support can be provided in the usual way with the light-sensitive copying layer. It is a radiation sensitive coating.
  • photopolymerizable mixtures which contain, in a known manner, photopolymerizable olefinically unsaturated compounds, such as monomers and / or oligomers, which are at least partially multiply olefinically unsaturated and which, in the presence of photoinitiator systems, rapidly dissolve in products which are difficult or insoluble in developers in the presence of actinic light get transferred.
  • photopolymerizable olefinically unsaturated compounds which are known per se for binders which can be crosslinked with UV light and for photopolymer printing plates are suitable, the type and amount depending on the intended use of the mixtures and on the polymer binder which may also be used and with which they are compatible should be.
  • this layer contains a photocrosslinkable polymer as binder and a multifunctional, ethylenically unsaturated monomer and a photoinitiator system consisting of one or more components and also conventional additives, such as suitable dyes, thermal polymerization inhibitors and plasticizers.
  • a photocrosslinkable polymer as binder and a multifunctional, ethylenically unsaturated monomer and a photoinitiator system consisting of one or more components and also conventional additives, such as suitable dyes, thermal polymerization inhibitors and plasticizers.
  • Suitable polymers are, for example, methyl methacrylate / methacrylic acid copolymers, styrene / methacrylic acid copolymers and methacrylic acid / acrylic acid copolymers, and optionally also polyurethanes, unsaturated polyesters and / or polyester urethanes.
  • Suitable olefinically unsaturated compounds are, for example, di- and polyacrylates and methacrylates, such as can be prepared by esterification of diols or polyols with acrylic acid or methacrylic acid, such as the di- and tri (meth) acrylates of ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol with a Molecular weight up to about 500, 1,2-propanediol, 1,3-propanediol, neopentyl glycol (2,2-dimethylpropanediol), 1,4-butanediol, 1,1,1-trimethylolpropane, glycerin or pentaerythritol; furthermore the monoacrylates and monomethacrylates of such diols and polyols, such as, for example, ethylene glycol or di-, tri- or tetraethylene glycol monoacrylates, monomers with two or more olefinically unsaturated bonds
  • Suitable photoinitiators are the photoinitiators or photoinitiator systems which are customary and known per se for photosensitive, photopolymerizable recording materials. Examples include: benzoin, benzoin ethers, especially benzoin alkyl ethers, substituted benzoin, alkyl ethers of substituted benzoin, such as e.g. ⁇ -methyl benzoalkyl ether or ⁇ -hydroxymethyl benzo alkyl ether; Benziles, benzil ketals, especially benzil dimethyl ketal, benzil methyl ethyl ketal or benzil methyl benzyl ketal; the acylphosphine oxide compounds known and effective as photoinitiators, e.g.
  • 2, 4, 6-trimethylbenzoyldiarylphosphine oxide 2, 4, 6-trimethylbenzoyldiarylphosphine oxide; Benzophenone, derivatives of benzophenone, 4,4'-dimethylaminobenzophenone, 4,4'-diethylaminobenzophenone, derivatives of Michler's ketone; Anthraquinone and substituted anthraquinones; aryl substituted imidazoles or their derivatives, e.g. 2,4,5-triarylimidazole dimers; 2-chlorothioxanthone and the acridine or phenacin derivatives effective as photoinitiators.
  • Examples of initiator systems are combinations of the initiators mentioned with sensitization aids or activators, such as, in particular, tertiary amines.
  • Typical examples of such initiator systems are combinations of benzophenone or benzophenone derivatives with tertiary amines, such as triethanolamine or Michler's ketone; or mixtures of 2,4,5-triarylimidazole dimers and 2-mercaptobenzoquinazole or the leuco bases of triphenylmethane dyes.
  • tertiary amines such as triethanolamine or Michler's ketone
  • 2,4,5-triarylimidazole dimers and 2-mercaptobenzoquinazole or the leuco bases of triphenylmethane dyes The choice of suitable photoinitiators or photoinitiator systems is familiar to the person skilled in the art.
  • the photoinitiators or photoinitiator systems are generally present in the photopolymerizable recording layer in amounts of 0.001 to 10% by weight, preferably in amounts of 0.05 to 5% by weight, based on the photopolymerizable recording layer.
  • additives and / or auxiliaries that can be contained in the photopolymerizable recording layer include, for example, thermal polymerization inhibitors, dyes and / or pigments, photochromic compounds or systems, sensitometric regulators, plasticizers, flow control agents, matting agents or lubricants and the like .
  • Suitable thermal polymerization inhibitors are, for example, hydroquinone, hydroquinone derivatives, 2,6-di-t-butyl-p-cresol, nitrophenols, N-nitrosoamines, such as N-nitrosodiphenylamine or the salts of N-nitrosocyclohexylhydroxylamine.
  • dyes and / or pigments which can act both as a contrast agent and to strengthen the layer include Brilliant Green Dye (CI 42 040), Viktoria-Reinblau FGA, Viktoria-Reinblau BO (CI 42 595), Viktoria-Blau B (CI 44 045), rhoadamine 6G (CI-45 160), triphenylmethane dyes, naphthalimide dyes and 3'-phenyl-7-dimethylamino-2,2'-spiro-di (2H-1-benzopyran).
  • Photochromic systems that change their color reversibly or irreversibly when exposed to actinic light without the photopolymerization process disturb, are, for example, leuco dyes together with suitable activators.
  • leuco dyes are the leuco bases of the triphenylmethane dyes, such as crystal violet leuco base and malachite green leuco base, leuco basic blue, leuco pararosaniline, leuko patent blue A or V; Rhodamine B base is also suitable.
  • Suitable activators for these photochromic compounds include organic halogen compounds which release halogen radicals when exposed to actinic light, or hexaarylbisimidazoles.
  • the sensitometric controllers include compounds such as 9-nitroanthracene, 10,10'-bisanthrone, phenazinium, phenoxazinium, acridinium or phenothiazinium dyes, especially in combination with mild reducing agents, 1,3-dinitrobenzenes and the like.
  • the known low-molecular or high-molecular esters such as phthalates or adipates, toluenesulfonamide or tricresyl phosphate, can serve as plasticizers.
  • the additives and / or auxiliary substances are present in the photopolymerizable recording layers in the effective amounts known and known for these substances.
  • the copying layers can of course also contain other constituents.
  • the following light-sensitive compositions or compounds can be used in the coating of the carrier materials: positive-working o-quinonediazides, in particular o-naphthoquinonediazides such as naphthoquinone- (1,2) -diazide- (2) -sulfonic acid esters or amides, which can be of low or higher molecular weight, as reproduction layers containing photosensitive compounds; negative working reproduction layers with condensation products from aromatic diazonium salts and compounds with active carbonyl groups; negative-working, mixed condensation products of aromatic diazonium compounds containing reproduction layers, the products with at least one unit each from a condensable aromatic diazonium salt compound and a condensable compound such as a phenol ether or an aromatic thioether, connected by a divalent intermediate derived from a condensable carbonyl compound, such as a methylene group, exhibit; positive-working layers
  • coated offset printing plates obtained from the post-treated substrates according to the invention are converted into the desired printing form in a known manner by imagewise exposure or irradiation and washing out of the non-image areas with a developer, preferably an aqueous developer solution.
  • the radiation-sensitive layer can therefore contain diazonium compounds, ordinary polymeric condensates, quinonediazides or photopolymers. Preference is given to photopolymers and in particular the reaction product from the polymerization of methyl methacrylate and methacrylic acid as binders and ethylenically unsaturated monomers and in particular butanediol diglycidyl diacrylate as the crosslinking component.
  • the process according to the invention makes it possible, by using a wide variety of functional groups, such as those bound to the hydrolyzed silane as radicals X, to functionalize the support surface in a manner related to the particular problem (increase in the hydrophilicity of the support, increase in the adhesion of the polymer).
  • the firm binding of the silane hydrolyzate to the carrier ensures the necessary storage stability of the printing plate, since destruction of the light-sensitive layer by diffusion of the aftertreatment substance into the layer is prevented, as can be the case with other aftertreatment processes, and secondly for long runs, because this intermediate layer adheres firmly to the surface during printing.
  • the inventive method increases the processing latitude both in terms of development times and in terms of the pH values of the developers, so that longer development times and / or aggressive developers practically no changes in the copying properties, such as dot gain, optical resolution or reproduction of finest structures compared to short development times with mild developers.
  • the printing plates were exposed by means of a commercial offset imagesetter (5 kW high-pressure mercury lamp) through a test negative (Ugra step wedge).
  • the finished printing forms were then colored by wiping with offset printing ink.
  • the fully colored wedge steps were determined depending on the sheet aftertreatment and development time, and the imaging of fine microlines and halftone dots was assessed.
  • the printing plates produced in this way were additionally checked for their run-time stability on a printing machine (Heidelberg GTO).
  • printing plates were subjected to an accelerated storage test in a climatic cabinet at 60 ° C and 50% humidity and checked at intervals for residual layer-free developability by examining the developed samples by applying offset printing ink with regard to the color acceptance behavior of the non-image areas (toning).
  • [2- (Trihydroxysilyl)] ethylphosphonic acid can, as described in US Pat. No. 3,780,127 or US Pat. No. 3,816,550, by hydrolysis of [2- (trialkoxysilyl)] ethylphosphonic acid dialkyl ester (alkyl is preferably methyl or ethyl) in conc . HCl can be obtained. After removing excess hydrochloric acid, the product obtained in this way can be diluted with water.
  • An electrochemically roughened by AC treatment in aqueous HCl solution and anodized in H2SO4 oxidized aluminum sheet with an oxide weight of 3 g / m2 is coated with a light-sensitive mixture so that the layer weight is 2 g / m2.
  • the photosensitive mixture has the following composition: 59% binder (copolymer of methyl methacrylate / methacrylic acid (70:30), the carboxyl groups of which are partially esterified with glycidyl methacrylate; K value of a 1% solution 35; acid number 65 mg KOH / g polymer) 30% monomer (diacrylate of 1,4-butanediol diglycidyl ether) 2% Michler's ketone 6% 2- (4'-methoxynaphthyl-1 ') - 4,6-bis- (trichloromethyl) -s-triazine 1% bromophenol blue 2% plasticizer (benzenesulfonic acid-n-butylamide)
  • the support coated in this way is exposed by means of a commercially available offset exposure device (mercury vapor lamp (5 kW)) through a UGRA step wedge and developed with an aqueous alkaline developer. Then be The fully cross-linked wedge steps and the storage stability of the unexposed printing plate in the climatic cabinet at 60 ° C and 50% relative humidity (accelerated storage test) are determined by exposing and developing the printing plate again after a corresponding storage period, and an emulsion of bold ink and water on this printing form is applied. The time is determined after the hydrophilicity has been reduced to such an extent that the non-image areas take on color during the staining test as a result of the increased temperature and atmospheric humidity. Likewise, adhesion and durability of the printing plates are determined by means of a pressure test.
  • a printing plate as described in Comparative Example 1 is produced, with the difference that the roughened and anodized support is coated with an aqueous 1% solution of the hydrolyzate / condensate of (2-trimethoxysilylethyl) phosphonic acid dimethyl ester for 20 seconds before coating with the light-sensitive material undergoes at 50 ° C.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP19900116032 1989-08-31 1990-08-22 Process for the manufacture of plates, foils, or sheet-like materials and process for the manufacture of presensitized lithographic printing plates Withdrawn EP0418575A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3928794A DE3928794A1 (de) 1989-08-31 1989-08-31 Verfahren zur herstellung von platten-, folien- oder bandfoermigen materialien sowie verfahren zur herstellung von sensibilisierten flachdruckplatten
DE3928794 1989-08-31

Publications (2)

Publication Number Publication Date
EP0418575A2 true EP0418575A2 (fr) 1991-03-27
EP0418575A3 EP0418575A3 (en) 1992-02-05

Family

ID=6388250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900116032 Withdrawn EP0418575A3 (en) 1989-08-31 1990-08-22 Process for the manufacture of plates, foils, or sheet-like materials and process for the manufacture of presensitized lithographic printing plates

Country Status (6)

Country Link
US (1) US5073475A (fr)
EP (1) EP0418575A3 (fr)
JP (1) JPH0392391A (fr)
DE (1) DE3928794A1 (fr)
FI (1) FI904195A7 (fr)
NO (1) NO903798L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013182328A1 (fr) 2012-06-05 2013-12-12 Agfa Graphics Nv Précurseur pour plaque d'impression lithographique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187046A (en) * 1991-03-18 1993-02-16 Aluminum Company Of America Arc-grained lithoplate
US5481084A (en) * 1991-03-18 1996-01-02 Aluminum Company Of America Method for treating a surface such as a metal surface and producing products embodying such including lithoplate
US5665251A (en) * 1994-11-23 1997-09-09 International Business Machines Corporation RIE image transfer process for plating

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440050A (en) * 1965-02-05 1969-04-22 Polychrome Corp Lithographic plate
GB1235863A (en) * 1967-09-25 1971-06-16 Polychrome Corp Lithographic printing plates
DE3627758A1 (de) * 1986-08-16 1988-02-18 Basf Ag Verfahren zur herstellung elektrophotographischer aufzeichnungselemente
DE3627757A1 (de) * 1986-08-16 1988-02-18 Basf Ag Verfahren zur herstellung von flachdruckplatten
DE3740698A1 (de) * 1987-12-01 1989-06-15 Basf Ag Verfahren zur anodischen oxidation der oberflaeche von aluminium oder aluminiumlegierungen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013182328A1 (fr) 2012-06-05 2013-12-12 Agfa Graphics Nv Précurseur pour plaque d'impression lithographique
US9329479B2 (en) 2012-06-05 2016-05-03 Agfa Graphics Nv Lithographic printing plate precusor

Also Published As

Publication number Publication date
NO903798D0 (no) 1990-08-30
FI904195A0 (fi) 1990-08-24
US5073475A (en) 1991-12-17
FI904195A7 (fi) 1991-03-01
DE3928794A1 (de) 1991-03-07
JPH0392391A (ja) 1991-04-17
NO903798L (no) 1991-03-01
EP0418575A3 (en) 1992-02-05

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