EP1274582A1 - Method for inserting images on printing plates - Google Patents

Method for inserting images on printing plates

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Publication number
EP1274582A1
EP1274582A1 EP01919146A EP01919146A EP1274582A1 EP 1274582 A1 EP1274582 A1 EP 1274582A1 EP 01919146 A EP01919146 A EP 01919146A EP 01919146 A EP01919146 A EP 01919146A EP 1274582 A1 EP1274582 A1 EP 1274582A1
Authority
EP
European Patent Office
Prior art keywords
ink
layer
printing plate
areas
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
EP01919146A
Other languages
German (de)
French (fr)
Other versions
EP1274582B1 (en
Inventor
Karl Erich Albert Schaschek
Georg Schneider
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.)
Koenig and Bauer AG
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Koenig and Bauer 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 Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1274582A1 publication Critical patent/EP1274582A1/en
Application granted granted Critical
Publication of EP1274582B1 publication Critical patent/EP1274582B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1066—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by spraying with powders, by using a nozzle, e.g. an ink jet system, by fusing a previously coated powder, e.g. with a laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/16—Waterless working, i.e. ink repelling exposed (imaged) or non-exposed (non-imaged) areas, not requiring fountain solution or water, e.g. dry lithography or driography

Definitions

  • the invention relates to a method for imaging printing plates according to the preamble of claim 1.
  • thermoplates in the prior art, in which a crosslinking of the top layer is achieved by laser energy and the process initiated in this way is completed in a further step.
  • thermal abrasive plates There, an absorbing intermediate layer is caused to evaporate by the laser, whereupon the overlying, ink-repellent layer is dissolved and can be removed in a subsequent step (cf. US 54 87 338 A).
  • JP 101 19 230 A discloses a method for producing a printing plate.
  • the ink-accepting layer ie the printing layer
  • the ink-receiving layer is sprayed with an imaging material using an ink jet, so that the non-printing areas become water-soluble.
  • the invention has for its object to provide a method for imaging printing plates.
  • an ink jet printing unit is used to apply a developing liquid to the ink-repellent layer in accordance with an image to be printed, with which the ink-repellent layer is dissolved or dissolved in the sprayed area and which - or dissolved areas of the ink-repellent layer are removed.
  • the top layer is therefore removed directly by spraying or printing on the top layer by means of the inkjet printing unit, or the top layer is dissolved or dissolved to the extent that it can be removed.
  • the developing liquid With the developing liquid, the property of the ink-repellent layer is changed in such a way that it can be easily removed in the areas printed with the developing liquid.
  • the areas not printed with the developing liquid remain on the printing plate, so that the desired surface structure is achieved.
  • the ink-accepting layer is exposed, so that the printing plate receives ink-accepting areas and ink-repellent areas in accordance with the image to be printed.
  • the ink jet printing unit the developing liquid can be applied drop by drop precisely.
  • clean room conditions in the printing press which had to be observed in the previously known methods, can be dispensed with, since no material is applied, but only material is removed.
  • a waterless printing plate with an ink-repellent layer of silicone is preferably used in particular.
  • Various layers that can withstand the developing liquid for the ink-repellent layer can be considered as the ink-accepting layer; in particular, a polyethylene film can be provided under the silicone layer.
  • the developing liquid used is expediently matched to the layer to be dissolved or dissolved.
  • a solvent is used with which the corresponding areas of the ink-repellent layer are liquefied.
  • the silicone layer can be removed in a particularly simple manner in a subsequent step in the detached areas.
  • the resolved or resolved areas with the first printing ink or with a suitable one Cleaning unit can be removed mechanically.
  • the areas of the printing plate lying on top or dissolved are preferably removed by mechanical stress on the printing plate, in particular by a printing process. This minimizes the steps required for imaging and achieves efficient and simple printing plate imaging.
  • Figure 1 is a schematic representation of a printing plate in the raw state before the application of the developing liquid by means of a print head according to a preferred embodiment of the invention.
  • Fig. 2 is a schematic representation of the printing plate of Fig. 1 after the imaging.
  • the printing plate 01 shown in FIG. 1 has a carrier layer or a substrate 02, which can be made of aluminum and has a suitable thickness in order to achieve the desired mechanical properties.
  • the ink-accepting layer 03 can be designed as a polyethylene film. Their thickness can be in the range of 5-50 ⁇ m, preferably it can be approximately 20 ⁇ m.
  • the color-repellent layer 04 consists of silicone. Their thickness is chosen appropriately. It can be in the range of a few ⁇ m, in the embodiment shown it is approximately 2 ⁇ m.
  • An adhesive or primer layer can lie between the substrate 02 and the ink-accepting layer 03.
  • a titanium oxide layer is provided.
  • a waterless printing plate from Presstek (PeariDry) is used, as described in US 54 87 338 A, to which express reference is made with regard to the construction of the printing plate.
  • a solvent is applied dropwise to the surface of the silicone layer 04 by means of the print head 05 of an ink jet printing unit, which is shown schematically in FIG. 1.
  • the control of the print head 05 is carried out in the usual way for inkjet printers.
  • the solvent applied in accordance with the image to be printed liquefies the silicone in the areas in which it is applied, so that the silicone can easily be detached in these areas.
  • only a change in the properties of the silicone layer 04 e.g. B. by swelling or reducing the bracket to the underlying layer.
  • the detached silicone layer 04 or its detached areas can be continued with the first color or a suitable cleaning unit. It is advantageous here that the dissolved silicone is present as a liquid.
  • the liquefied silicone can be removed by the mechanical stress of a printing process.
  • the completely illustrated printing plate with the removed areas of the silicone layer 04 is shown in FIG. 2.
  • the printing plate 01 is brought into contact with printing ink that is only on the ink-accepting polyethylene layer 03, ie in the areas in which the silicone layer 04 has been removed, adheres. Accordingly, the imaging of the printing plate is transferred to the support to be printed.

Abstract

The invention concerns a method for inserting images on printing plates, wherein a printing plate is prepared with an ink-accepting layer and an ink-repelling layer applied thereon. According to the invention, a developing fluid is sprayed on the ink-repelling layer by an ink-jet printing group in accordance with an image to be printed, by means of which the ink-repelling layer is etched or dissolved in the sprayed areas for swelling or adhesion promotion is eliminated. The etched or dissolved areas of the ink-repelling layer are removed. A waterless printing plate having an ink-repelling layer made of silicon is especially used.

Description

Beschreibungdescription
Verfahren zur Bebilderung von DruckplattenProcess for imaging printing plates
Die Erfindung betrifft ein Verfahren zur Bebilderung von Druckplatten gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for imaging printing plates according to the preamble of claim 1.
Bebilderung von Flachdruck bzw. Druckplatten für den Offsetdruck sind verschiedene Verfahren bekannt. Zum einen werden photoempfindliche Platten mit Lasern belichtet und anschließend nasschemisch entwickelt. Weiter existieren im Stand der Technik sogenannte Thermoplatten, bei denen durch Laserenergie eine Vernetzung der obersten Schicht erreicht wird und in einem weiteren Schritt der so angestoßene Prozess zu Ende geführt wird. Ein anderer Ansatz wurde bei den sogenannten thermisch ablasiven Platten gewählt. Dort wird eine absorbierende Zwischenschicht durch den Laser zum Verdampfen gebracht, worauf die darüber liegende, farbabstoßende Schicht gelöst ist und in einem Folgeschritt entfernt werden kann (vgl. US 54 87 338 A).Various methods are known for imaging flat printing or printing plates for offset printing. On the one hand, photosensitive plates are exposed with lasers and then developed by wet chemistry. There are also so-called thermoplates in the prior art, in which a crosslinking of the top layer is achieved by laser energy and the process initiated in this way is completed in a further step. Another approach was chosen for the so-called thermal abrasive plates. There, an absorbing intermediate layer is caused to evaporate by the laser, whereupon the overlying, ink-repellent layer is dissolved and can be removed in a subsequent step (cf. US 54 87 338 A).
Ferner ist es bekannt, eine Druckplatte durch das Auftragen einer geeigneten Flüssigkeit zu bebildern. Gemäß der US 40 03 312 A wird auf ein Druckplattensubstrat eine Silikonlösung entsprechend dem zu druckenden Bild aufgespritzt und dort ausgehärtet, wodurch die erforderliche Oberflächenstruktur der Druckplatte erzeugt wird. Die Verarbeitung der aufzuspritzenden Silikonschicht ist jedoch schwierig. Zudem kommt die Aushärtung der aufgespritzten Silikonschicht hinzu.It is also known to image a printing plate by applying a suitable liquid. According to US 40 03 312 A, a silicone solution corresponding to the image to be printed is sprayed onto a printing plate substrate and cured there, thereby producing the required surface structure of the printing plate. However, processing the silicone layer to be sprayed on is difficult. In addition, the sprayed-on silicone layer is hardened.
Die JP 101 19 230 A offenbart ein Verfahren zur Herstellung einer Druckplatte. Bei dieser Druckplatte liegt die farbannehmende Schicht, d. h. die druckende Schicht, auf der wasserannehmenden Schicht. Zur Herstellung der Platte wird die farbannehmende Schicht mit einem bildgebenden Material mittels eines Ink-Jets besprüht, so daß die nicht druckenden Bereiche wasserlöslich werden. Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Bebilderung von Druckplatten zu schaffen.JP 101 19 230 A discloses a method for producing a printing plate. With this printing plate, the ink-accepting layer, ie the printing layer, lies on the water-accepting layer. To produce the plate, the ink-receiving layer is sprayed with an imaging material using an ink jet, so that the non-printing areas become water-soluble. The invention has for its object to provide a method for imaging printing plates.
Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst.The object is achieved by the features of claim 1.
Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, dass mit einem Ink-Jet-Druckwerk auf die farbabstoßende Schicht entsprechend einem zu druckenden Bild eine Entwicklungsflüssigkeit aufgetragen wird, mit der die farbabstoßende Schicht in dem bespritzten Bereich an- bzw. aufgelöst wird und die an- bzw. aufgelösten Bereiche der farbabstoßenden Schicht entfernt werden.The advantages that can be achieved with the invention are, in particular, that an ink jet printing unit is used to apply a developing liquid to the ink-repellent layer in accordance with an image to be printed, with which the ink-repellent layer is dissolved or dissolved in the sprayed area and which - or dissolved areas of the ink-repellent layer are removed.
Es wird also unmittelbar durch das Besprühen bzw. Bedrucken der obersten Schicht mittels des Ink- Jet-Druckwerkes die oberste Schicht abgetragen bzw. soweit an- bzw. aufgelöst, dass diese abtragbar ist. Mit der Entwicklungsflüssigkeit wird die Eigenschaft der farbabstoßenden Schicht derart verändert, dass diese in den mit der Entwicklungsflüssigkeit bedruckten Bereichen leicht zu entfernen ist. Die nicht mit der Entwicklungsflüssigkeit bedruckten Bereiche verbleiben auf der Druckplatte, so dass die gewünschte Oberflächenstruktur erreicht wird. In den Bereichen, in denen die farbabstoßende Schicht entfernt wird, wird die farbannehmende Schicht freigelegt, so dass die Druckplatte entsprechend dem zu druckenden Bild farbannehmende Bereiche und farbabweisende Bereiche erhält. Mit Hilfe des Ink-Jet-Druckwerkes, kann die Entwicklungsflüssigkeit tröpfchenweise präzise aufgetragen werden.The top layer is therefore removed directly by spraying or printing on the top layer by means of the inkjet printing unit, or the top layer is dissolved or dissolved to the extent that it can be removed. With the developing liquid, the property of the ink-repellent layer is changed in such a way that it can be easily removed in the areas printed with the developing liquid. The areas not printed with the developing liquid remain on the printing plate, so that the desired surface structure is achieved. In the areas in which the ink-repellent layer is removed, the ink-accepting layer is exposed, so that the printing plate receives ink-accepting areas and ink-repellent areas in accordance with the image to be printed. With the help of the ink jet printing unit, the developing liquid can be applied drop by drop precisely.
Durch das unmittelbare An- bzw. Auflösen der Oberflächenschicht der Druckplatte in der beschriebenen Weise werden beträchtliche Vorteile erreicht. Es ergibt sich eine höhere Betriebssicherheit des Ink-Jet-Verfahrens, insbesondere wird das bei den herkömmlichen Verfahren bekannte Eintrocknen der Tinte verhindert. Beim Aufspritzen von Silikonlösungen oder dem Auftrag lichtabweisender Druckfarben zur photographischen Entwicklung der Druckplatten verklebte häufig der Druckkopf, was eine aufwendige Reinigung erforderlich machte, bzw. den Druckkopf gänzlich unbrauchbar machte. Im Gegensatz hierzu kann die bei der vorliegenden Erfindung verwendete Entwicklungsflüssigkeit den Druckkopf des Ink-Jet-Druckwerkes nicht verkleben.Considerable advantages are achieved by directly dissolving or dissolving the surface layer of the printing plate in the manner described. This results in a higher operational reliability of the ink jet process, in particular the drying of the ink, which is known in the conventional processes, is prevented. When spraying silicone solutions or the application of light-repellent printing inks for the photographic development of the printing plates, the print head often stuck, which was a complex process Cleaning required or made the printhead completely unusable. In contrast, the developing liquid used in the present invention cannot stick the print head of the ink jet printing unit.
Zudem entfallen weitere Schritte bei der Bearbeitung der Druckplatte wie z. B. die Aushärtung der aufgespritzten Silikon- bzw. Kunstharzlösung oder die übliche photographische Entwicklung photosensitiver Schichten nach der Fixierung der nicht abzulösenden Bereiche.In addition, further steps in the processing of the printing plate such as. B. the curing of the sprayed-on silicone or synthetic resin solution or the usual photographic development of photosensitive layers after the fixing of the areas which cannot be removed.
In besonders vorteilhafter Weise kann bei der beschriebenen Bebilderung einer Druckplatte auf Reinraumbedingungen in der Druckmaschine, die bei den bislang bekannten Verfahren einzuhalten war, verzichtet werden, da kein Material aufgetragen, sondern lediglich Material abgetragen wird.In a particularly advantageous manner, in the described imaging of a printing plate, clean room conditions in the printing press, which had to be observed in the previously known methods, can be dispensed with, since no material is applied, but only material is removed.
Grundsätzlich können verschiedene Druckplatten eingesetzt werden. Vorzugsweise jedoch wird insbesondere eine wasserlose Druckplatte mit einer farbabstoßenden Schicht aus Silikon verwendet. Als farbannehmende Schicht kommen verschiedene Schichten in Betracht, die der Entwicklungsflüssigkeit für die farbabstoßende Schicht standhalten, insbesondere kann eine Polyethylenfolie unter der Silikonschicht liegend vorgesehen sein.In principle, different printing plates can be used. However, a waterless printing plate with an ink-repellent layer of silicone is preferably used in particular. Various layers that can withstand the developing liquid for the ink-repellent layer can be considered as the ink-accepting layer; in particular, a polyethylene film can be provided under the silicone layer.
Die verwendete Entwicklungsflüssigkeit wird zweckmäßigerweise auf die an- bzw. aufzulösende Schicht abgestimmt. Insbesondere wird ein Lösungsmittel verwendet, mit dem die entsprechenden Bereiche der farbabstoßenden Schicht verflüssigt werden. Hierdurch kann die Silikonschicht in einem nachfolgenden Schritt in den angelösten Bereichen besonders einfach entfernt werden.The developing liquid used is expediently matched to the layer to be dissolved or dissolved. In particular, a solvent is used with which the corresponding areas of the ink-repellent layer are liquefied. As a result, the silicone layer can be removed in a particularly simple manner in a subsequent step in the detached areas.
Zur Entfernung der an- bzw. abgelösten Bereiche der oben liegenden Schicht der Druckplatte kommen verschiedene Varianten in Betracht. Zum Beispiel können die an- bzw. aufgelösten Bereiche mit der ersten Druckfarbe oder durch eine geeignete Reinigungseinheit mechanisch entfernt werden. Vorzugsweise werden die an- bzw. aufgelösten Bereiche der oben liegenden Schicht der Druckplatte durch mechanische Beanspruchung der Druckplatte, insbesondere durch einen Druckvorgang entfernt. Hierdurch werden die erforderlichen Arbeitsschritte zur Bebilderung minimiert und eine effiziente sowie einfache Druckplattenbebilderung erzielt.Various variants are possible for removing the detached or detached areas of the top layer of the printing plate. For example, the resolved or resolved areas with the first printing ink or with a suitable one Cleaning unit can be removed mechanically. The areas of the printing plate lying on top or dissolved are preferably removed by mechanical stress on the printing plate, in particular by a printing process. This minimizes the steps required for imaging and achieves efficient and simple printing plate imaging.
Anstelle der zuvor beschriebenen An- bzw. Auflösung und Entfernung der farbabweisenden Schicht ist es grundsätzlich auch möglich, eine oben liegende, farbannehmende Schicht mit Entwicklungsflüssigkeit in der genannten Weise mittels eines Ink-Jet-Druckwerkes zu bedrucken und hierdurch an- und aufzulösen sowie zu entfernen, so dass die in diesem Fall darunter liegende, farbabstoßende Schicht bereichsweise freigelegt wird. Vorzugsweise jedoch wird in der zuvor beschriebenen Art und Weise eine Druckplatte mit oben liegender, farbabweisender Schicht insbesondere aus Silikon verwendet, die bereichsweise entsprechend dem zu druckenden Bild entfernt wird.Instead of the previously described dissolving and dissolving and removing of the ink-repellent layer, it is in principle also possible to print an overlying ink-accepting layer with developing liquid in the manner mentioned by means of an ink-jet printing unit and thereby to dissolve, dissolve and remove it , so that the ink-repellent layer underneath in this case is exposed in certain areas. Preferably, however, in the manner described above, a printing plate with a top, ink-repellent layer, in particular made of silicone, is used, which is removed in regions in accordance with the image to be printed.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below.
Es zeigen:Show it:
Fig. 1 eine schematische Darstellung einer Druckplatte im Rohzustand vor dem Auftrag der Entwicklungsflüssigkeit mittels eines Druckkopfes gemäß einer bevorzugten Ausführung der Erfindung;Figure 1 is a schematic representation of a printing plate in the raw state before the application of the developing liquid by means of a print head according to a preferred embodiment of the invention.
Fig. 2 eine schematische Darstellung der Druckplatte aus Fig. 1 nach der Bebilderung.Fig. 2 is a schematic representation of the printing plate of Fig. 1 after the imaging.
Die in Fig. 1 gezeigte Druckplatte 01 besitzt eine Trägerschicht bzw. ein Substrat 02, das aus Aluminium sein kann und eine geeignete Dicke besitzt, um die gewünschten mechanischen Eigenschaften zu erzielen. Darauf aufgebracht sind eine farbannehmende Schicht 03 sowie darüber liegend eine farbabweisende Schicht 04. Die farbannehmende Schicht 03 kann als Polyethylenfolie ausgebildet sein. Ihre Dicke kann im Bereich von 5 - 50 μm liegen, vorzugsweise kann sie etwa 20 μm betragen. Die farbabweisende Schicht 04 besteht aus Silikon. Ihre Dicke ist geeignet gewählt. Sie kann im Bereich einiger μm liegen, in der gezeigten Ausführung beträgt sie etwa 2 μm. Zwischen dem Substrat 02 und der farbannehmenden Schicht 03 kann eine Haft- oder Grundierschicht liegen. Im gezeigten Ausführungsbeispiel ist eine Titam-Oxid-Schicht vorgesehen.The printing plate 01 shown in FIG. 1 has a carrier layer or a substrate 02, which can be made of aluminum and has a suitable thickness in order to achieve the desired mechanical properties. On it are applied a color-accepting Layer 03 and an ink-repellent layer 04 lying above it. The ink-accepting layer 03 can be designed as a polyethylene film. Their thickness can be in the range of 5-50 μm, preferably it can be approximately 20 μm. The color-repellent layer 04 consists of silicone. Their thickness is chosen appropriately. It can be in the range of a few μm, in the embodiment shown it is approximately 2 μm. An adhesive or primer layer can lie between the substrate 02 and the ink-accepting layer 03. In the exemplary embodiment shown, a titanium oxide layer is provided.
Vorzugsweise wird eine wasserlose Druckplatte der Firma Presstek (PeariDry) verwendet, wie sie in der US 54 87 338 A beschrieben ist, auf die bezüglich des Aufbaus der Druckplatte ausdrücklich verwiesen wird.Preferably, a waterless printing plate from Presstek (PeariDry) is used, as described in US 54 87 338 A, to which express reference is made with regard to the construction of the printing plate.
Um die Silikonschicht 04 entsprechend dem zu druckenden Bild bereichsweise abzulösen bzw. zu entfernen wird mittels des in Fig. 1 schematisch dargestellten Druckkopfes 05 eines Ink-Jet-Druckwerkes als Entwicklungsflüssigkeit ein Lösungsmittel tröpfchenweise auf die Oberfläche der Silikonschicht 04 aufgebracht. Die Steuerung des Druckkopfes 05 erfolgt in der für Tintenstrahldrucker üblichen Weise. Das entsprechend dem zu druckenden Bild aufgebrachte Lösungsmittel verflüssigt das Silikon in den Bereichen, in denen es aufgebracht ist, so dass das Silikon in diesen Bereichen einfach herausgelöst werden kann. Anstelle des Verflüssigung kann auch nur eine Veränderung der Eigenschaften der Silikonschicht 04, z. B. durch Quellen oder Verminderung der Halterung zur darunterliegenden Schicht erfolgen. Die angelöste Silikonschicht 04 bzw. deren angelöste Bereiche können mit der ersten Farbe oder einer geeigneten Reinigungseinheit fortgeführt werden. Vorteilhaft ist hierbei, dass das angelöste Silikon als Flüssigkeit vorliegt. Insbesondere kann das verflüssigte Silikon durch die mechanische Beanspruchung eines Druckvorganges entfernt werden.In order to partially detach or remove the silicone layer 04 in accordance with the image to be printed, a solvent is applied dropwise to the surface of the silicone layer 04 by means of the print head 05 of an ink jet printing unit, which is shown schematically in FIG. 1. The control of the print head 05 is carried out in the usual way for inkjet printers. The solvent applied in accordance with the image to be printed liquefies the silicone in the areas in which it is applied, so that the silicone can easily be detached in these areas. Instead of liquefaction, only a change in the properties of the silicone layer 04, e.g. B. by swelling or reducing the bracket to the underlying layer. The detached silicone layer 04 or its detached areas can be continued with the first color or a suitable cleaning unit. It is advantageous here that the dissolved silicone is present as a liquid. In particular, the liquefied silicone can be removed by the mechanical stress of a printing process.
Die fertig bebilderte Druckplatte mit den entfernten Bereichen der Silikonschicht 04 ist in Fig. 2 gezeigt. Die Druckplatte 01 wird mit Druckfarbe in Berührung gebracht, die nur an der farbannehmenden Polyethylenschicht 03, d. h. in den Bereichen, in denen die Silikonschicht 04 entfernt wurde, haften bleibt. Dementsprechend wird die Bebilderung der Druckplatte auf den zu bedruckenden Träger übertragen. The completely illustrated printing plate with the removed areas of the silicone layer 04 is shown in FIG. 2. The printing plate 01 is brought into contact with printing ink that is only on the ink-accepting polyethylene layer 03, ie in the areas in which the silicone layer 04 has been removed, adheres. Accordingly, the imaging of the printing plate is transferred to the support to be printed.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
01 Druckplatte01 pressure plate
02 Substrat02 substrate
03 farbannehmende Schicht, Silikonschicht03 ink-accepting layer, silicone layer
04 farbabweisende Schicht, Polyethylenschicht04 color-repellent layer, polyethylene layer
05 Druckkopf 05 printhead

Claims

Ansprüche Expectations
1. Verfahren zur Bebilderung einer Druckplatte, bei dem eine Druckplatte (01 ) mit einer farbannehmenden Schicht (03) und einer daraufliegenden, farbabstoßenden Schicht (04) bereitgestellt wird, mit einem Ink-Jet-Druckwerk (05) auf die farbabstoßende Schicht (04) entsprechend einem zu druckenden Bild eine Entwicklungsflüssigkeit aufgetragen wird, mit der die farbabstoßende Schicht (04) in den beaufschlagten Bereichen verändert wird, und die veränderten Bereiche der farbabstoßenden Schicht (04) entfernt werden.1. A method for imaging a printing plate, in which a printing plate (01) with an ink-accepting layer (03) and an ink-repellent layer (04) lying thereon is provided, with an ink-jet printing unit (05) on the ink-repellent layer (04 ) a developing liquid is applied in accordance with an image to be printed, with which the ink-repellent layer (04) is changed in the exposed areas and the changed areas of the ink-repellent layer (04) are removed.
2. Verfahren nach dem vorhergehenden Anspruch, wobei eine Druckplatte (01) für den wasserlosen Offsetdruck mit einer farbabstoßenden Schicht (04) aus Silikon verwendet wird.2. The method according to the preceding claim, wherein a printing plate (01) is used for waterless offset printing with an ink-repellent layer (04) made of silicone.
3. Verfahren nach einem der vorhergehenden Ansprüche, wobei eine Entwicklungsflüssigkeit verwendet wird, mit der die bespritzten Bereiche der farbabstoßenden Schicht (04) verflüssigt werden.3. The method according to any one of the preceding claims, wherein a developing liquid is used with which the sprayed areas of the ink-repellent layer (04) are liquefied.
4. Verfahren nach einem der vorhergehenden Ansprüche, wobei die an- bzw. aufgelösten Bereiche der farbabstoßenden Schicht (04) durch mechanische Beanspruchung der Druckplatte (01) entfernt werden. 4. The method according to any one of the preceding claims, wherein the dissolved or dissolved areas of the ink-repellent layer (04) are removed by mechanical stress on the printing plate (01).
EP01919146A 2000-04-14 2001-02-22 Method for inserting images on printing plates Expired - Lifetime EP1274582B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10018547A DE10018547C2 (en) 2000-04-14 2000-04-14 Process for imaging printing plates
DE10018547 2000-04-14
PCT/DE2001/000697 WO2001078984A1 (en) 2000-04-14 2001-02-22 Method for inserting images on printing plates

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EP1274582A1 true EP1274582A1 (en) 2003-01-15
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CN (1) CN1218837C (en)
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DE (2) DE10018547C2 (en)
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AU4636001A (en) 2001-10-30
WO2001078984A1 (en) 2001-10-25
CN1422212A (en) 2003-06-04
US20030085972A1 (en) 2003-05-08
CN1218837C (en) 2005-09-14
JP2003531029A (en) 2003-10-21
ATE252454T1 (en) 2003-11-15
DE10018547C2 (en) 2003-11-20
DE50100838D1 (en) 2003-11-27
EP1274582B1 (en) 2003-10-22
DE10018547A1 (en) 2001-10-25
US6918663B2 (en) 2005-07-19
RU2241601C2 (en) 2004-12-10

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