EP0909642B1 - Verfahren zur Herstellung von Stencil-Schablonen - Google Patents

Verfahren zur Herstellung von Stencil-Schablonen Download PDF

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Publication number
EP0909642B1
EP0909642B1 EP98307721A EP98307721A EP0909642B1 EP 0909642 B1 EP0909642 B1 EP 0909642B1 EP 98307721 A EP98307721 A EP 98307721A EP 98307721 A EP98307721 A EP 98307721A EP 0909642 B1 EP0909642 B1 EP 0909642B1
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EP
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Prior art keywords
stencil
chemical agent
screen
forming layer
areas
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EP98307721A
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English (en)
French (fr)
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EP0909642A1 (de
Inventor
John William Jones
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MacDermid Autotype Ltd
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Autotype International Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing
    • B41C1/147—Forme preparation for stencil-printing or silk-screen printing by imagewise deposition of a liquid, e.g. from an ink jet; Chemical perforation by the hardening or solubilizing of the ink impervious coating or sheet

Definitions

  • the present invention relates to the production of stencils for screen printing.
  • One method, referred to as the "direct method" of producing screen printing stencils involves the coating of a liquid light-sensitive emulsion directly onto a screen mesh. After drying, the entire screen is exposed to actinic light through a film positive held in contact with the coated mesh in a vacuum frame. The black portions of the positive do not allow light to penetrate to the emulsion which remains soft in those areas. In the areas which are exposed to light, the emulsion hardens and becomes insoluble, so that, after washing out with a suitable solvent, the unexposed areas allow ink to pass through onto a substrate surface during a subsequent printing process.
  • Another method referred to as the "direct/indirect method” involves contacting a film, consisting of a pre-coated unsensitised emulsion on a base support, with the screen mesh by placing the screen on top of the flat film. A sensitised emulsion is then forced across the mesh from the opposite side, thus laminating the film to the screen and at the same time sensitising its emulsion. After drying, the base support is peeled off and the screen is then processed and used in the same way as in the direct method.
  • a film base is pre-coated with a pre-sensitised emulsion.
  • the film is exposed to actinic light through a positive held in contact with the coated film. After chemical hardening of the exposed emulsion, the unexposed emulsion is washed away.
  • the stencil produced is then mounted on the screen mesh and used for printing as described above for the direct method.
  • a pre-coated and pre-sensitised film base is adhered to one surface of the mesh by the capillary action of water applied to the opposite surface of the mesh. After drying, the film is peeled off and the screen then processed and used as described for the direct method.
  • hand-cut stencils can be used. These are produced by cutting the required stencil design into an emulsion coating on a film base support. The cut areas are removed from the base before the film is applied to the mesh. The emulsion is then softened to cause it to adhere to the mesh. After drying, the base is peeled off. The screen is then ready for printing. This method is suitable only for simple work.
  • CA-A-2088400 (Gerber Scientific Products, Inc.) describes a method and apparatus in which a blocking composition is ejected directly onto the screen mesh surface in a pre-programmed manner in accordance with data representative of the desired image.
  • the blocking composition directly occludes areas of the screen mesh to define the desired stencil pattern.
  • EP-A-0492351 (Gerber Scientific Products, Inc.) describes a method and apparatus where an unexposed light-sensitive emulsion layer is applied to a screen mesh surface and a graphic is directly ink-jet printed on the emulsion layer by means of a printing mechanism, using a printing ink, to provide a mask through which the emulsion is exposed before the screen is further processed.
  • the apparatus described has been commercialised under the name "Gerber ScreenJet", which is marketed as a screen imaging system for textile screen printing.
  • the apparatus comprises a mechanism for mounting variously sized screen frames in a horizontal position and orientated with respect to the X, Y and Z printing axes of the apparatus, a control computer providing data defining the graphic, an ink-jet facility with one or more print heads which are movable in the X and Y directions and an ultraviolet lamp assembly for exposure of the light sensitive emulsion layer on the screen mesh surface.
  • a control computer providing data defining the graphic
  • an ink-jet facility with one or more print heads which are movable in the X and Y directions and an ultraviolet lamp assembly for exposure of the light sensitive emulsion layer on the screen mesh surface.
  • Several other similar ink-jet screen imaging systems are also available, including the "Luscher JetScreen", utilising a hot-melt ink-jet process, and a horizontal flat-bed ink-jet machine from Swiss company Mantel.
  • Dropwise liquid application apparatus such as ink-jet printers operate by ejecting a liquid onto a receiving substrate in controlled patterns of closely spaced liquid droplets. By selectively regulating the pattern of droplets, ink-jet printers can be used to produce a wide variety of printed materials, including text, graphics and images on a wide range of substrates.
  • ink is printed directly onto the surface of the final receiving substrate.
  • An ink-jet printing system where an image is printed on an intermediate image transfer surface and subsequently transferred to the final receiving substrate is disclosed in US-A-4538156 (AT&T Teletype Corp.).
  • US-A-5380769 (Tektronix Inc.) describes reactive ink compositions containing at least two reactive components, a base ink component and a curing component, that are applied to a receiving substrate separately.
  • the base ink component is preferably applied to the receiving substrate using ink-jet printing techniques and, upon exposure of the base ink component to the curing component, a durable, crosslinked ink is produced.
  • EP-A-0635362 (Riso Kagaku Corp.) describes in example 5 a process which involves direct selective dissolution by a water-based solvent, which can be applied dropwise, of a resin layer coated on a polyester fibre cloth.
  • GB-A-1431462 (Agfa) describes the production of relief images by the inkjet process.
  • EP-A-0883026 (Eastman Kodak) was not published until 9 December 1998. It is a document Art. 54(3) EPC for the Contracting States Germany, France and the UK. It describes the use of the inkjet process to apply a hardening agent to a layer of gelatin coated on a polyester mesh and the subsequent washing away of unhardened gelatin to form a screen-printing stencil.
  • a method of producing a screen-printing stencil having open areas and blocked areas for respectively passage and blocking of a printing medium comprising:
  • the stencil is formed by chemical means without the need to use either special lighting conditions or actinic radiation.
  • the stencil-forming layer can be applied to the screen by any convenient means.
  • a coated film comprising a support base on which the stencil-forming agent is coated.
  • the coated film can be adhered to the screen by application of a liquid, for example water. This can be done by placing the coated film with its coated surface uppermost on a solid flat surface and placing the screen mesh on top such that there is close contact between the mesh and the coated film.
  • the coated film can be rolled down a screen mesh which has been thoroughly wetted with a gentle spray of a liquid, for example water. After drying, the support base can be peeled away from the mesh to leave the stencil-forming layer.
  • the stencil-forming layer may be coated directly onto the screen mesh, for example in the form of an emulsion applied by use of a coating trough or squeegee, preferably to both sides of the screen simultaneously.
  • the dropwise application of the chemical agent is conveniently carried out by means of an apparatus of the kind described, in which the coated screen is first positioned.
  • the chemical agent may be produced in situ by reaction between two or more precursor materials, separately applied to the stencil-forming layer, at least one of which is applied in the said areas corresponding to the blocked areas of the stencil to be produced. This may conveniently be achieved by use of a plurality of drop-ejection heads, in a suitable apparatus of the kind described.
  • the chemical agent precursor applied in the areas corresponding to the blocked areas of the stencil to be produced comprises a reactive dialdehyde and a further chemical agent precursor is a dilute acid.
  • the reactive aldehyde is water-soluble, for example glyoxal or glutaraldehyde.
  • the dilute acid is advantageously an acid which lowers the pH to 4 or less when mixed with the dialdehyde. Examples of such an acid are hydrochloric acid and citric acid.
  • the dropwise application is controlled according to data encoding the desired pattern of blocked and open areas of the stencil to be produced.
  • This control may be by a computer, for example a personal computer.
  • data representative of the desired output pattern is input to a controller as prerecorded digital signals which are used by the ejection head to deposit or not deposit the liquid containing the chemical agent as it scans the surface of the stencil forming layer.
  • the material of the stencil-forming layer is selected to react with the chemical agent to produce lower solubility areas corresponding to the said blocked areas.
  • Figure 1 shows the coated film which consists of a stencil-forming layer 1 coated on a flexible support base 2, the film having been applied to a screen mesh 3, mounted in a suitable screen frame 4.
  • FIG. 1 of the drawings shows the coated screen whilst the support base 2 is being peeled away.
  • Figure 3 shows a chemical agent 5 being applied to the stencil-forming layer 1 in droplets 5 which are ejected from an ejection head (not shown) of an apparatus of the kind described controlled by a computer.
  • the chemical agent 5 is absorbed into the stencil-forming layer 1 to form areas 6 corresponding to the areas that have reacted with the chemical agent to produce areas of insoluble material.
  • Figure 4 of the drawings shows the final screen after the screen has been washed out so that the areas 6 of the stencil-forming layer to which the chemical agent was applied remains and the higher solubility areas have been washed away.
  • Figures 5 to 7 of the drawings correspond to figures 1 to 4 but show the production of a stencil by a method in which the stencil-forming layer is coated directly onto the screen without the use of a coated film.
  • the stencil-forming layer is formed from a stencil-forming agent composed of a liquid unsensitised emulsion which is directly coated onto both sides of a screen mesh mounted in a frame.
  • Figures 5 and 6 show operations corresponding to the operations of figures 1 and 3 and figure 7 corresponds to figure 4.
  • the key criterium in selecting a suitable combination of stencil-forming layer and chemical agent is that the chemical agent should form a good image on the layer formed from the stencil-forming layers; for example, a drop of the chemical agent should neither be so repelled by the layer as to produce a defective image nor it should not spread so far as to reduce the resolution of the image. Moreover, it should not spread so anisotropically (because of irregularities in the layer) as to deform the image.
  • the stencil-forming layer may comprise a polymer which reacts with the chemical agent and thus forms a part of the final screen stencil.
  • a typical example of such a polymer is polyvinyl alcohol which is preferably present in an amount of 5 to 100 wt.% of the stencil-forming layer with the balance comprising, for example, other suitable polymers and/or suitable fillers, binders and plasticisers.
  • the polyvinyl alcohol preferably has a degree of hydrolysis of 20 to 99.9 mole % and, independently thereof, a degree of polymerisation of 100 to 3500.
  • Suitable polymers include those that change their solubility characteristics on treatment with a suitable chemical agent. Examples of such polymers are:
  • the polymers and other components are chosen so that the chemical agent forms a good image when applied.
  • Layers that are not compatible with any solvent used in the chemical agent typically, water will produce insufficient spread of the liquid and a poor-quality image will result. If the layer has too great an affinity with the chemical agent, the liquid will spread too far, giving a blurred, low resolution image.
  • the stencil layer thickness is typically from 5 to 100 ⁇ m.
  • the support base may comprise a non-reactive polymer, preferably an organic resin support, e.g. polyethylene terephthalate, polyethylene, polycarbonate, polyvinyl chloride or polystyrene.
  • the organic resin support can optionally be coated with a subbing layer to give desired adhesion properties with the stencil-forming layer.
  • the support base is removed as a coherent film in the screen production method, preferably prior to the application of the chemical agent to the stencil-forming layer.
  • the chemical agent is preferably applied dropwise to the stencil-forming layer by an apparatus of the kind described, for example a Gerber ScreenJet apparatus.
  • the liquid applied should exhibit desirable stability, surface tension and viscosity characteristics and may therefore contain surfactants, viscosity modifiers, light stabilisers and/or anti-oxidants.
  • the chemical agent may include a suitable carrier, for example a suitable solvent or dispersant for the active component(s).
  • Suitable active components include
  • the imaged screen is dried if necessary, then the resulting screen stencil can be developed by washing away the portion of higher solubility with a suitable solvent, for example water, thereby leaving behind areas of reduced solubility to occlude areas of the mesh.
  • a suitable solvent for example water
  • the stencil can be further toughened by a post-treatment, for example using extra chemicals, actinic radiation or heat.
  • the extra chemicals may be resident in the original stencil-forming agent, or may be supplied externally, for example dropwise.
  • Examples of chemical toughening agents are ones operating at pH 7 or higher and include dialdehydes particularly glyoxal, and aqueous bases, for example aqueous potassium carbonate. It is presently believed that these toughening agents will only work when a boron salt is used as the chemical agent.
  • the screen produced is then ready for use as a printing medium using techniques familiar to those skilled in the art.
  • the chemicals used are those cited in the Examples 1 to 4 which follow, the broad physical properties, chemical resistances, washout solvent (water) and reclaim chemicals (typically periodate systems) will in many cases be those used routinely by screen printers. So, although the method of producing the stencil is new, the resulting product will often be familiar and highly acceptable to screen printers.
  • the stencil can be reclaimed with dilute acid without the use of the industry-standard periodate system.
  • This low cost and environmentally-friendlier reclaim system is a distinct added advantage.
  • a screen stencil can be produced directly from digital information sources; it is not necessary to use safelights during the stencil making process; there is no requirement for an exposure step utilising an actinic radiation source; and a finished stencil can be produced in a shorter time than by conventional screen printing techniques.
  • a liquid containing a chemical agent was prepared according to the formula:
  • the stencil-forming layer comprised a typical (but unsensitized) commercially available capillary screen film - "Autoline HD" (b) - consisting of a pigmented polyvinyl alcohol/polyvinyl acetate emulsion on a support base, with an approximate emulsion (stencil-forming agent) thickness of 15 ⁇ m.
  • a degreased screen mesh of mesh count 120 threads per cm was mounted in a suitable frame, then the mesh was wetted thoroughly with a gentle spray of water and the receptor element was rolled down the mesh using light pressure. Slight pressure was applied to the print side of the receptor element by squeegee, then excess water was removed from the opposite side of the screen, followed by drying the screen using a fan with a maximum temperature of 40 °C. The support base was removed from the mesh.
  • the resulting screen was positioned in a Gerber ScreenJet apparatus to the manufacturer's instructions, then the prepared chemical agent was applied to the stencil-forming layer of the screen from a cartridge in a preprogrammed manner to form the desired image.
  • the imaged screen was removed from the "ScreenJet" apparatus and dried by warm air fan (maximum 40 °C) to produce on the screen a stencil-forming layer having areas of lower and higher solubility. Any remaining unreacted part of the receptor element was removed and the screen was washed out using cold running water, until the portion of the assembly of higher solubility was washed away to waste.
  • the stencil was then placed in a standard screen printing machine and prints of an acceptable quality were obtained using standard solvent-based screen printing inks.
  • a liquid containing a chemical agent was prepared according to the formula:
  • the stencil-forming agent comprised a typical (but unsensitized) polyvinyl alcohol/polyvinyl acetate screen emulsion - "2000" (b). This was directly coated onto a suitably degreased screen mesh of 120 threads per cm., mounted in a suitable frame. Using a coating trough, two coats of this emulsion were applied, wet on wet, to the print side of the screen, followed by two coats, wet on wet, to the other side of the screen. The resulting screen was then dried horizontally, print side down using a warm air fan at a maximum temperature of 30 °C.
  • the resulting screen was positioned in the "ScreenJet" apparatus according to the manufacturer's instructions, then the prepared chemical agent was applied to the stencil-forming layer of the screen from a cartridge in a preprogrammed manner to form the desired image.
  • the imaged screen was removed from the "ScreenJet” apparatus and dried by warm air fan (maximum 40 °C) to produce on the screen a stencil-forming layer having areas of lower and higher solubility. Any remaining unreacted part of the receptor element was removed and the screen was washed out using cold running water, until the portion of the assembly of higher solubility was washed away to waste.
  • the stencil was then placed in a standard screen printing machine and prints of an acceptable quality were obtained using standard solvent-based screen printing inks.
  • Example 1 The procedure of Example 1 above was repeated exactly to produce a screen stencil.
  • This stencil was then treated with a 10 wt.% aqueous solution of potassium carbonate, which was applied by brush so as to cover the entire stencil area, then finally allowed to dry. This produced a toughened stencil.
  • the stencil was then placed in a standard screen printing machine and prints of an acceptable quality were obtained using standard solvent-based screen printing inks.
  • Example 1 The procedure of Example 1 above was repeated exactly to produce a screen stencil.
  • This stencil was then treated with a 2 wt.% solution of 35 wt.% hydrochloric acid, which was applied by brush so as to cover the entire stencil area. This treatment disrupted the screen stencil and allowed the resulting residue to be washed away to waste using a cold water spray, giving a reclaimed screen with no observable stain present.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Printing Plates And Materials Therefor (AREA)
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  • Paints Or Removers (AREA)
  • Materials For Photolithography (AREA)

Claims (43)

  1. Verfahren zur Herstellung einer Siebdruckschablone mit offenen Bereichen und blockierten Bereichen für die Passage bzw. das Blockieren eines Druckmediums, wobei das Verfahren Folgendes umfasst:
    Vorsehen eines Siebdrucksiebes mit einer schablonenbildenden Schicht darauf aufgetragen, wobei die schablonenbildende Schicht ein Polymer oder mehrere der folgenden Polymere umfasst:
    Polyvinylalkohol;
    Polyvinylalkohol-Derivate;
    wasserlösliche Cellulose-Derivate
    Epoxidharze und
    Aminoharze;
    Positionieren des beschichteten Siebs zum tropfenweisen Aufbringen eines chemischen Mittels darauf, das zur Reaktion mit der schablonenbildenden Schicht fähig ist, um Bereiche davon mit niedrigeren und höheren Löslichkeiten herbeizuführen, die den blockierten bzw. den offenen Schablonenbereichen entsprechen;
    tropfenweises Aufbringen des chemischen Mittels auf das beschichtete Sieb unter Kontrolle von Daten, welche für die Bereiche mit niedrigerer bzw. höherer Löslichkeit kodieren und
    Wegwaschen der schablonenbildenden Schicht in den Bereichen höherer Löslichkeit, um dadurch die Siebdruckschablone herzustellen.
  2. Verfahren nach Anspruch 1, worin die schablonenbildende Schicht wie folgt auf das Sieb aufgebracht wird: mittels eines beschichteten Films, der eine Trägerbasis und eine Schicht aus dem schablonenbildenden Material umfasst, das in dem Aufbringschritt an das Sieb übertragen wird.
  3. Verfahren nach Anspruch 2, worin die Trägerbasis Folgendes umfasst: Polyethylenterephthalat, Polyethylen, Polycarbonat, Polyvinylchlorid, Polystyren oder ein beschichtetes Papier.
  4. Verfahren nach Anspruch 2 oder 3, worin die Schicht aus schablonenbildendem Material auf der Trägerbasis eine Dicke von 5 bis 100 µm aufweist.
  5. Verfahren nach Anspruch 1, worin die schablonenbildende Schicht als eine Flüssigkeit auf das Sieb aufgebracht wird, die daran anschließend zur Bildung der schablonenbildenden Schicht zum Trocknen veranlasst oder trocknen lassen wird.
  6. Verfahren nach einem der vorangehenden Ansprüche, worin das chemische Mittel in situ durch Reaktion zwischen zwei oder mehreren Präkursor-Materialien hergestellt wird, die getrennt auf die schablonenbildende Schicht aufgebracht werden, von denen mindestens eines tropfenweise in den genannten Bereichen aufgebracht wird, die den blockierten Bereichen der herzustellenden Schablone entsprechen.
  7. Verfahren nach einem der Ansprüche 1 bis 6, worin die schablonenbildende Schicht als ein wasserlösliches Cellulose-Derivat Stärke umfasst.
  8. Verfahren nach einem der Ansprüche 1 bis 6, worin die schablonenbildende Schicht als ein wasserlösliches Cellulose-Derivat Hydroxypropylcellulose umfasst.
  9. Verfahren nach einem der Ansprüche 1 bis 6, worin die schablonenbildende Schicht als ein Aminoharz ein Harnstoff-Formaldehyd-Harz umfasst.
  10. Verfahren nach einem der Ansprüche 1 bis 6, worin die schablonenbildende Schicht als ein Aminoharz ein Melamin-Formaldehyd-Harz umfasst.
  11. Verfahren nach einem der Ansprüche 1 bis 6, worin die schablonenbildende Schicht Polyvinylalkohol mit einem Hydrolysegrad von 20 bis 99,9 Mol-% und/oder einen Polymerisationsgrad von 100 bis 3500 umfasst.
  12. Verfahren nach einem der vorangehenden Ansprüche, worin das Polymer/die Polymere in der schablonenbildenden Schicht in einer Gesamtmenge von 5 bis 100 Gew.-% der schablonenbildenden Schicht vorliegt/vorliegen.
  13. Verfahren nach Anspruch 11, worin die schablonenbildende Schicht eines oder mehreres von Folgendem enthält: Füllstoffe, Bindemittel und Weichmacher.
  14. Verfahren nach einem der vorangehenden Ansprüche, worin die aktive(n) Komponente(n) des chemischen Mittels eines oder mehreres von Folgendem umfasst/umfassen:
    Borsalze;
    Borsäure;
    Aldehyde;
    Isocyanate;
    Isocyanat-Derivate;
    Carbodiimide;
    Carbodiimid-Derivate;
    Übergangsmetallverbindungen;
    Übergangsmetallkomplexe;
    Aziridin;
    Aziridin-Derivate;
    Amine;
    multifunktionale Silanverbindungen;
    N-Methylol-Verbindungen und
    aktive Vinylverbindungen.
  15. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels ein Metallborat oder mehrere Metallborate der Gruppe I oder Gruppe II umfasst/umfassen.
  16. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels Formaldehyd umfasst/umfassen.
  17. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels einen Dialdehyd umfasst/umfassen.
  18. Verfahren nach Anspruch 17, worin der Dialdehyd Glyoxal ist.
  19. Verfahren nach Anspruch 17, worin der Dialdehyd Glutaraldehyd ist.
  20. Verfahren nach einem der Ansprüche 17 bis 19, worin der Dialdehyd durch Behandlung mit Mineralsäure aktiviert wird.
  21. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels Toluendiisocyanat umfasst/umfassen.
  22. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels 1,3-Dicyclohexylcarbodiimid umfasst/umfassen.
  23. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels Pentahydroxy(tetradecanoat)dichrom umfasst/umfassen.
  24. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels ein Pentahydroxy(tetradecanoat)dichrom-Derivat umfasst/umfassen.
  25. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels Siliciumtetraacetat umfasst/umfassen.
  26. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels Dimethylolharnstoff umfasst/umfassen.
  27. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels Methyloldimethylhydantoin umfasst/umfassen.
  28. Verfahren nach Anspruch 14, worin die aktive(n) Komponente(n) des chemischen Mittels 1,3,5-Triacryloyl-hexahydro-s-triazin umfasst/umfassen.
  29. Verfahren nach einem der vorangehenden Ansprüche, worin die aktive(n) Komponente(n) des chemischen Mittels von 0,5 bis 100 Gew.-% des chemischen Mittels ausmacht/ausmachen.
  30. Verfahren nach Anspruch 6, worin der Präkursor des chemischen Mittels, der in den Bereichen aufgebracht wird, die den blockierten Bereichen der herzustellenden Schablone entsprechen, einen reaktiven Dialdehyd umfasst und ein weiterer Präkursor des chemischen Mittels eine verdünnte Säure ist.
  31. Verfahren nach Anspruch 30, worin der reaktive Aldehyd wasserlöslich ist.
  32. Verfahren nach Anspruch 31, worin der reaktive Aldehyd Glyoxal oder Glutaraldehyd ist.
  33. Verfahren nach einem der Ansprüche 30 bis 32, worin die verdünnte Säure eine Säure ist, die den pH auf 4 oder niedriger senkt, wenn sie mit dem Dialdehyd vermischt wird.
  34. Verfahren nach Anspruch 33, worin die Säure Salzsäure oder Citronensäure ist.
  35. Verfahren nach einem der vorangehenden Ansprüche, worin die Schablone ferner durch eine Nachbehandlung unter Verwendung von einem chemischen Mittel oder mehreren chemischen Mitteln, aktinischer Strahlung oder Hitze gehärtet wird.
  36. Verfahren nach Anspruch 35, worin das weitere chemische Mittel/die weiteren chemischen Mittel zur weiteren Härtung in der ursprünglichen schablonenbildenden Schicht resident ist/sind.
  37. Verfahren nach Anspruch 35, worin das weitere chemische Mittel/die weiteren chemischen Mittel tropfenweise aufgebracht wird/werden.
  38. Verfahren nach einem der Ansprüche 35 bis 37, worin das weitere chemische Mittel/die weiteren chemischen Mittel eine wässrige Base einschließtleinschließen.
  39. Verfahren nach Anspruch 38, worin die Base Kaliumcarbonat ist.
  40. Verfahren nach einem der vorangehenden Ansprüche, das einen weiteren Regenerierungsschritt einschließt.
  41. Verfahren nach einem der Ansprüche 1 bis 14, das einen weiteren Regenerierungsschritt einschließt und worin das chemische Mittel, das mit der schablonenbildenden Schicht reagiert, ein Borat umfasst, wobei die Regenerierung bei einem pH von 4 oder weniger durchgeführt wird.
  42. Siebdruckverfahren, das die folgenden Schritte umfasst:
    Vorsehen einer Siebdruckschablone, die anhand eines Verfahrens nach einem der vorangehenden Ansprüche hergestellt wird;
    Inkontaktbringen der Siebdruckschablone mit einem Substrat und
    Durchleiten eines Druckmediums durch die offenen Bereiche der Schablone, um Bedrucken auf dem Substrat in Bereichen herbeizuführen, die den offenen Bereichen der Schablone entsprechen.
EP98307721A 1997-09-25 1998-09-23 Verfahren zur Herstellung von Stencil-Schablonen Expired - Lifetime EP0909642B1 (de)

Applications Claiming Priority (2)

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GB9720322A GB2329611B (en) 1997-09-25 1997-09-25 Screen printing stencil production
GB9720322 1997-09-25

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EP0909642A1 EP0909642A1 (de) 1999-04-21
EP0909642B1 true EP0909642B1 (de) 2003-03-12

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GB2333997B (en) * 1998-02-06 2002-07-17 Autotype Internat Ltd Screen printing stencil production
GB2335392B (en) 1998-02-17 2001-11-07 Autotype Internat Ltd Screen printing stencil production
CA2500633A1 (en) 2002-10-30 2004-05-13 National Research Council Of Canada Method of producing an image on a printing screen
EP1498262A1 (de) * 2003-07-15 2005-01-19 Kesper Druckwalzen GmbH Verfahren und Vorrichtung zur Herstellung einer Siebdruckschablone sowie Sieb mit einer Siebdruckschablone
JP5504540B2 (ja) * 2011-09-02 2014-05-28 株式会社サンタイプ スクリーン版強化液、およびこのスクリーン版強化液によるスクリーン版の処理手法
EP3817922A1 (de) * 2018-07-04 2021-05-12 Duralchrome AG Direct-to-mesh-siebdruckschablonenererzeugung

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DE2253944C2 (de) * 1972-11-03 1983-02-24 Agfa-Gevaert Ag, 5090 Leverkusen Verfahren zur Herstellung eines Reliefbildes
IL102877A (en) * 1992-08-20 1995-01-24 Duchovne Yoram Screen-printing process
US5292556A (en) * 1992-12-22 1994-03-08 E. I. Du Pont De Nemours And Company Method for preparing negative-working wash-off relief images
DE69413894T2 (de) * 1993-07-20 1999-04-15 Riso Kagaku Corp., Tokio/Tokyo Schablonendruckplatte
JPH0796603A (ja) * 1993-07-31 1995-04-11 Sony Corp インクジェット記録装置
WO1995012148A1 (en) * 1993-10-26 1995-05-04 The Chromaline Corporation Screen printing stencil composition with improved water resistance
US5466653A (en) * 1994-06-29 1995-11-14 E. I. Du Pont De Nemours And Company Method for preparing negative-working wash-off relief images and non-photosensitive elements for use therein
GB9711425D0 (en) * 1997-06-04 1997-07-30 Eastman Kodak Co Method of forming an image

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JPH11188833A (ja) 1999-07-13
DE69812027D1 (de) 2003-04-17
DE69812027T2 (de) 2004-03-18
AU741425B2 (en) 2001-11-29
ZA988796B (en) 2000-06-26
EP0909642A1 (de) 1999-04-21
AU8706498A (en) 1999-04-15
GB2329611B (en) 2002-05-08
CA2248599A1 (en) 1999-03-25
ES2195282T3 (es) 2003-12-01
GB9720322D0 (en) 1997-11-26
GB2329611A (en) 1999-03-31
ATE234197T1 (de) 2003-03-15

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