EP0011731B1 - Process for reproducing oil paintings or similarly structured pictures - Google Patents

Process for reproducing oil paintings or similarly structured pictures Download PDF

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Publication number
EP0011731B1
EP0011731B1 EP79104328A EP79104328A EP0011731B1 EP 0011731 B1 EP0011731 B1 EP 0011731B1 EP 79104328 A EP79104328 A EP 79104328A EP 79104328 A EP79104328 A EP 79104328A EP 0011731 B1 EP0011731 B1 EP 0011731B1
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EP
European Patent Office
Prior art keywords
color image
film
original
relief
image film
Prior art date
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Expired
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EP79104328A
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German (de)
French (fr)
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EP0011731A1 (en
Inventor
Emil Rudolf
Manfred Rudolf
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Individual
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Individual
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Priority to AT79104328T priority Critical patent/ATE3520T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F11/00—Designs imitating artistic work
    • B44F11/02—Imitation of pictures, e.g. oil paintings
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1039—Surface deformation only of sandwich or lamina [e.g., embossed panels]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24521—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24901—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material including coloring matter

Definitions

  • the invention relates to a method according to the preamble of patent claim 1.
  • DE-A-494894, FR-A-1521466, DE-A-2019699 and DE-A-2 352 966 have specified methods in which a true-to-original multicolor print on the image side is used transparent layer of gelatin or plastic is applied, which receives the relief design of the original surface by means of a shape removed from the original before or after application.
  • the relief-like surface design on the transparent layer is imitated, but does not give the same impression as in the original, since it is not formed by the color as in the original, so that the effect of the surface formed by the transparent layer is extremely strong from the viewing angle dependent on lighting and the like.
  • FR-A-1 493 516 the relief shape is provided with air through holes.
  • the color image film, over which a thick polystyrene film is attached, is then placed over the relief shape with a registration.
  • the thick polystyrene film is heated to the softening temperature of the color picture film.
  • the latter is pressed together with the color picture film into the depressions of the relief mold. This gives the color picture film the surface shape of the original after it has hardened again.
  • FR-A-1 548 337 corresponds to this known process with the exception that the color picture film is heated by irradiation with infrared light instead of contact heating by means of a polystyrene film and the formation is carried out solely by negative pressure below the relief mold.
  • the resulting relief surface of the color image film is an improvement over the transparent relief surface layers obtained in the aforementioned methods. In both methods, however, heat inevitably acts on the color image film over a relatively long period of time, which leads to a more or less strong change in the naturally temperature-sensitive printing inks leads.
  • the reason for this is that mainly the polystyrene film but also the color picture film itself, although the latter is relatively thin, has a non-negligible heat capacity, it taking a certain time until the heat transferred to the unprinted side of the color picture film has the printed page on the required softening temperature is provided. After that, it takes a certain time until the composite structure made of polystyrene film and color picture film, which has a significantly greater heat capacity than the color picture film alone, has cooled down again to harmless temperatures.
  • FR-A-1 311 733 has neither recognized nor discussed the problem of harmful heat overheating.
  • the invention has for its object to provide an improved method compared to the prior art, in which the effects of harmful high temperatures on the color image film are significantly reduced. This is achieved by the characterizing features of claim 1.
  • Dielectric heating simultaneously heats the color picture film over its entire thickness and brings it to the required softening temperature. Since only the thin coating, but not the canvas-like fabric of the reinforcement layer, is dielectrically heated, the composite structure made of the thin coating of the reinforcement layer and the color picture film has a low thermal capacity and cools down relatively quickly, especially since the fabric of the reinforcement layer that has remained cool absorbs heat. In addition, the process is carried out faster and the output per unit of time is higher. A more precise metering of the heat supplied is possible both with regard to the intensity and the actual action time.
  • the relief shape used can be galvanized or at least formed entirely of metal on its shaping surface. This ensures shape accuracy even with a high number of reproductions. Furthermore, good and rapid heat dissipation results on the printed side of the color picture film.
  • a color image film 2 is placed with the printed side 3 down.
  • a reinforcement layer 9 is placed on the color picture film 2, which consists of a canvas-like fabric and on its side facing the color picture film 2 consists of a thin, dielectric, heatable coating, over which there is in turn a flat pressure compensation plate 7 made of closed-cell foam, which is not heatable by dielectric means .
  • the relief mold 1 is produced by known processes. For example, a negative soft cast made of silicone rubber or polyester resin can be made from the original oil painting.
  • the color image film 2 is printed, for example, using the offset method, with a color image of the original oil painting having extremely precise color values being processed without light reflections to give accurately dimensioned offset films in four or more colors. Of course, it is important to pay attention to exact dimensional accuracy. Both in the production of these offset films and in the production of the relief mold 1, it is possible from the outset to provide registration marks outside the image field, which then make it easier to align the color film 2 with the relief mold 1.
  • an electrode 4 arranged below the relief form 1 and on the one hand an electrode 5 arranged above the pressure compensation plate 7 are connected to a high-frequency generator 6.
  • the electrodes 4, 5 are brought closer to one another until a predetermined pressure is exerted on the color image film 2 and the relief mold 1 via the pressure compensation plate 7 and the reinforcing layer 9.
  • the color picture film 2 and the coating of the reinforcement layer 9 are heated dielectrically to their softening or welding temperature.
  • the color picture film 2 deforms into the negatively formed forming surface of the relief mold 1, while the reinforcement layer 9 is simultaneously welded to the non-printed side of the color picture film 2.
  • the electrode 5 can be designed in such a way that a uniform, homogeneous heating of the film 2 is ensured over its entire strength and its entire dimensions. Appropriate subdivision of the electrode 5 can, however, also result in a somewhat higher or somewhat earlier heating in the middle of the surface of the color image film 2 if the resulting partial electrodes are switched on in a corresponding time sequence.
  • the printed color image film 2 deformed by the process results in a very precise replica of the original with the finest structures, so that even those that look almost smooth Surface shapes, for example, can be reproduced true to the original in the painting technique of the 19th century.
  • the authenticity character is further emphasized by the fabric of the reinforcing layer 9 which is visible from the rear.
  • An HF generator 6 with a power of 40 KW and a frequency of 27.12 MHz has an electrode area of 50 x 50 cm, the electrodes 4, 5 having to be acted upon with a force of 300 KN / cm 2 .
  • the color picture film 2 consists of PVC with a thickness of 0.2 mm and is rasterlessly printed on one side in 8-color granolitho art print.
  • the thickness of the pressure compensation plate 7 is 20 mm and corresponds approximately to that of the relief form 1.
  • the material of the reinforcing layer 9 consists of canvas-binding fabric made of nylon with a PVC coating of 0.1 mm thickness. After the electrodes 4, 5 have been applied, 30 sec. RF energy fed.

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Fats And Perfumes (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Printing Methods (AREA)
  • Cosmetics (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Medicinal Preparation (AREA)
  • Lubricants (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

A process for the reproduction of oil painting and the like, having a relief surface, using a relief mold taken from the original and a thermoplastic foil, imprinted with a color picture corresponding to the original, the foil being molded while being heated and which includes placing the foil upon the relief mold in a fitting alignment and heating the foil essentially homogeneously to its liquefying temperature across its entire surface.

Description

Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a method according to the preamble of patent claim 1.

Zur Reproduktion beispielsweise von Ölgemälden bietet sich zunächst das Kopieren an. Gute Kopien erfordern jedoch viel Sachkenntnis und hohen Zeitaufwand, so daß sie teuer sind und in ihrer Menge nicht der mit der Wohnkultur ansteigenden Nachfrage nachkommen können. Demgegenüber ergibt zwar der zu hoher Wiedergabetreue in Farbe und Auflösung entwickelte Mehrfarben-Kunstdruck preiswerte Nachbildungen, jedoch haftet diesen der Nachteil an, daß die reliefartige Oberflächenstruktur des Originals fehlt, die bei einem Ölgemälde oder einem ähnlichen Kunstwerk auch Ausdrucksmittel des Künstlers ist und selbst von einem Laien als solches erkannt wird.For the reproduction of oil paintings, for example, copying is the first option. However, good copies require a lot of expertise and a lot of time, so that they are expensive and cannot meet the increasing demand with the home decor. On the other hand, the multicolor art print developed to high fidelity in color and resolution results in inexpensive replicas, but this suffers from the disadvantage that the relief-like surface structure of the original is missing, which is also an expression of the artist in an oil painting or similar work of art and even by one Layperson is recognized as such.

Zur Lösung dieses Problems wurden in der DE-A-494894, der FR-A-1521466, der DE-A-2019699 und der DE-A-2 352 966 Verfahren angegeben, bei welchen auf einen originalgetreuen Mehrfarben-Druck an der Bildseite eine transparente Schicht aus Gelatine bzw. Kunststoff aufgebracht wird, die mittels einer vom Original abgenommenen Form vor oder nach dem Aufbringen die Reliefgestaltung der Originaloberfläche erhält. Damit ist zwar an der durchsichtigen Schicht die reliefartige Oberflächengestaltung nachgeahmt, ergibt jedoch nicht den gleichen Eindruck wie beim Original, da sie nicht wie im Original durch die Farbe gebildet ist, so daß also die Wirkung der durch die durchsichtige Schicht gebildeten Oberfläche außerordentlich stark vom Betrachtungswinkel, der Beleuchtung und dergleichen abhängig ist.To solve this problem, DE-A-494894, FR-A-1521466, DE-A-2019699 and DE-A-2 352 966 have specified methods in which a true-to-original multicolor print on the image side is used transparent layer of gelatin or plastic is applied, which receives the relief design of the original surface by means of a shape removed from the original before or after application. Thus, the relief-like surface design on the transparent layer is imitated, but does not give the same impression as in the original, since it is not formed by the color as in the original, so that the effect of the surface formed by the transparent layer is extremely strong from the viewing angle dependent on lighting and the like.

Diese Unzulänglichkeiten sind bei Verfahren gemäß den FR-A-1 493 516 und FR-A-1 548 337 ausgeschaltet, von denen der Oberbegriff des Patentanspruchs 1 ausgeht. Nach der FR-A-1 493 516 wird die Reliefform mit Luftdurchgangslöchern versehen. Über die Reliefform wird dann unter Paßausrichtung die Farbbildfolie gelegt, über welcher eine dicke Polystyrolfolie angebracht wird. Die dicke Polystyrolfolie wird auf die Erweichungstemperatur der Farbbildfolie erwärmt. Danach wird durch Unterdruck unterhalb der Reliefform und/oder Überdruck oberhalb der Polystyrolfolie diese zusammen mit der Farbbildfolie in die Vertiefungen der Reliefform gedrückt. Damit erhält die Farbbildfolie nach dem Wiedererhärten die Oberflächenform des Originals. Das Verfahren gemäß der FR-A-1 548 337 entspricht diesem bekannten Verfahren mit der Ausnahme, daß die Farbbildfolie durch Bestrahlung mit Infrarotlicht anstelle der Kontakterwärmung mittels einer Polystyrolfolie erwärmt wird und die Formung allein durch Unterdruck unterhalb der Reliefform erfolgt. Gegenüber den bei den vorangehend genannten Verfahren erzielten durchsichtigen Reliefoberflächenschichten stellt die sich ergebende Reliefoberfläche der Farbbildfolie eine Verbesserung dar. Bei beiden Verfahren wirkt aber zwangsläufig Wärme über einen verhältnismäßig langen Zeitraum auf die Farbbildfolie ein, was zu einer mehr oder minder starken Veränderung der naturgemäß temperaturempfindlichen Druckfarben führt. Der Grund hierfür liegt darin, daß hauptsächlich die Polystyrolfolie aber auch die Farbbildfolie selbst, obwohl letztere relativ dünn ist, eine nicht vernachlässigbare Wärmekapazität aufweisen, wobei es eine gewisse Zeit dauert, bis die auf die unbedruckte Seite der Farbbildfolie übertragene Wärme die bedruckte Seite auf die erforderliche Erweichungstemperatur erbracht ist. Danach dauert es eine gewisse Zeit, bis das Verbundgebilde aus Polystyrolfolie und Farbbildfolie, welches eine wesentlich größere Wärmekapazität als die Farbbildfolie allein besitzt, wieder auf unschädliche Temperaturen abgekühlt ist.These shortcomings are eliminated in methods according to FR-A-1 493 516 and FR-A-1 548 337, from which the preamble of claim 1 is based. According to FR-A-1 493 516, the relief shape is provided with air through holes. The color image film, over which a thick polystyrene film is attached, is then placed over the relief shape with a registration. The thick polystyrene film is heated to the softening temperature of the color picture film. Then, by means of negative pressure below the relief mold and / or excess pressure above the polystyrene film, the latter is pressed together with the color picture film into the depressions of the relief mold. This gives the color picture film the surface shape of the original after it has hardened again. The process according to FR-A-1 548 337 corresponds to this known process with the exception that the color picture film is heated by irradiation with infrared light instead of contact heating by means of a polystyrene film and the formation is carried out solely by negative pressure below the relief mold. The resulting relief surface of the color image film is an improvement over the transparent relief surface layers obtained in the aforementioned methods. In both methods, however, heat inevitably acts on the color image film over a relatively long period of time, which leads to a more or less strong change in the naturally temperature-sensitive printing inks leads. The reason for this is that mainly the polystyrene film but also the color picture film itself, although the latter is relatively thin, has a non-negligible heat capacity, it taking a certain time until the heat transferred to the unprinted side of the color picture film has the printed page on the required softening temperature is provided. After that, it takes a certain time until the composite structure made of polystyrene film and color picture film, which has a significantly greater heat capacity than the color picture film alone, has cooled down again to harmless temperatures.

Zwar ist aus der DE-A-2 352 966 ein Reproduktionsverfahren von Ölgemälden bekanntgeworden, bei dem eine Erwärmung dielektrisch durchgeführt wird und dazu eine dielektrisch schmelzbare Folie vorgesehen wird. Abgesehen davon, daß auch hier keine Stützschicht aus Gewebematerial verwendet wird und damit das Problem einer Wärmeüberhitzung überhaupt nicht auftreten kann, kann die durch dieses bekannte Verfahren erzielbare Reproduktion, bei der auf einem Druckbild lediglich eine durchsichtige Folien-Schicht mit reliefartiger Oberflächengestaltung aufgetragen ist, den Anforderungen an eine naturgetreue Nachahmung beispielsweise alter Meister nicht entsprechen.From DE-A-2 352 966 a reproduction method of oil paintings has become known, in which heating is carried out dielectrically and a dielectric meltable film is provided for this purpose. Apart from the fact that here no support layer made of fabric material is used and thus the problem of heat overheating cannot occur at all, the reproduction achievable by this known method, in which only a transparent film layer with a relief-like surface design is applied to a printed image, The requirements for a lifelike imitation, for example of old masters, do not meet.

Zwar ist die Verwendung einer Verstärkungsschicht aus leinwandartigem Gewebe aus der FR-A-1 311 733 und aus der GB-A-782 703 bekanntgeworden.The use of a reinforcing layer made of canvas-like fabric is known from FR-A-1 311 733 and from GB-A-782 703.

Die Anwendung dieses bekannten Verfahrens nach den eben zitierten Patentschriften führt aber ebenfalls zu Reproduktionen, deren Qualität und Güte mit Reproduktionen, die entsprechend dem erfindungsgemäßen Verfahren hergestellt sind, nicht vergleichbar sind.However, the use of this known method according to the patents just cited likewise leads to reproductions, the quality and quality of which are not comparable with reproductions which have been produced in accordance with the method according to the invention.

So ist zunächst einmal festzuhalten, daß das aus der britischen Patentschrift bekannte Reproduktionsverfahren äußerst aufwendig ist. So wird in diesem Verfahren zunächst ein Zwischenbildträger mit einem metachromatischem Papier mit einer darauf aufgebrachten Klebeschicht und einer Lackschicht benötigt, wobei dieser Zwischenbildträger mit dem Papier und der Klebeschicht nach dem Druckvorgang wieder herabgewaschen werden müssen. Schon bereits aus diesen letztgenannten beiden Merkmalen ist ersichtlich, daß die Qualität der Reproduktionen erheblich leiden muß, da die letztgenannten beiden Schichten aus Papier und Klebstoff zwischen der Bildfolie und der Reliefform während des Druckvorgangs vorgesehen sind. Darüber hinaus sind bei diesem Verfahren mehrere weitere Lackschichten und Klebeschichten zur ordnungsgemäßen Durchführung des Verfahrens notwendig. Bei diesem äußerst aufwendigen bekannten Verfahren ist darüber hinaus die Verbindung der Gewebeschicht mit den Lack- und Farbträgerschichten nicht so fest und vollkommen, wie es gerne wünschenswert wäre. Vor allem aber auch die lange und notwendige Hitzeeinwirkung mit Hitze- und Druckplatten führt zu einer nachteilhaften Beeinträchtigung der Reproduktionsqualität, da insbesondere die Farben des Farbdruckes beeinträchtigt werden können.First of all, it should be noted that the reproduction process known from the British patent specification is extremely complex. In this process, an intermediate image carrier with a metachromatic paper with an adhesive layer and a lacquer layer applied thereon is first required, this intermediate image carrier with the paper and the adhesive layer having to be washed down again after the printing process. Already from these latter two features it can be seen that the quality of the reproductions must suffer considerably since the latter two layers of paper and adhesive are provided between the image film and the relief form during the printing process. In addition, this process includes several other layers of paint and adhesive layers necessary for the proper execution of the procedure. In this extremely complex known method, moreover, the connection of the fabric layer to the lacquer and ink carrier layers is not as strong and perfect as it would be desirable to be. Above all, however, the long and necessary exposure to heat with heat and pressure plates leads to a disadvantageous impairment of the reproduction quality, since in particular the colors of the color printing can be impaired.

Auch in der FR-A-1 311 733 ist das Problem der schädlichen Wärmeüberhitzung weder erkannt noch diskutiert worden.FR-A-1 311 733 has neither recognized nor discussed the problem of harmful heat overheating.

Der Erfindung liegt die Aufgabe zugrunde, ein gegenüber dem Stand der Technik verbessertes Verfahren zu schaffen, bei welchem die Einwirkungen schädlich hoher Temperaturen auf die Farbbildfolie wesentlich verkürzt werden. Erreicht wird dies durch die kennzeichnenden Merkmale des Patentanspruchs 1.The invention has for its object to provide an improved method compared to the prior art, in which the effects of harmful high temperatures on the color image film are significantly reduced. This is achieved by the characterizing features of claim 1.

Durch die dielektrische Erwärmung wird die Farbbildfolie gleichzeitig über ihre gesamte Dicke erwärmt und auf die erforderliche Erweichungstemperatur gebracht. Da lediglich die dünne Beschichtung, nicht aber das leinwandartige Gewebe der Verstärkungsschicht dielektrisch erwärmt wird, hat das Verbundgebilde aus der dünnen Beschichtung der Verstärkungsschicht und der Farbbildfolie eine geringe Wärmekapazität und kühlt relativ schnell ab, zumal das Kühl gebliebene Gewebe der Verstärkungsschicht Wärme aufnimmt. Darüber hinaus ergibt sich noch eine schnellere Verfahrensdurchführung und ein höherer Ausstoß pro Zeiteinheit. Auch ist eine genauere Dosierung der zugeführten Wärme sowohl hinsichtlich der Intensität als auch der tatsächlichen Wirkungszeit möglich.Dielectric heating simultaneously heats the color picture film over its entire thickness and brings it to the required softening temperature. Since only the thin coating, but not the canvas-like fabric of the reinforcement layer, is dielectrically heated, the composite structure made of the thin coating of the reinforcement layer and the color picture film has a low thermal capacity and cools down relatively quickly, especially since the fabric of the reinforcement layer that has remained cool absorbs heat. In addition, the process is carried out faster and the output per unit of time is higher. A more precise metering of the heat supplied is possible both with regard to the intensity and the actual action time.

Als vorteilhafte Ausgestaltung des Verfahrens kann die verwendete Reliefform zumindest an ihrer Formungsfläche galvanisch metallisiert oder gänzlich aus Metall ausgebildet werden. Damit ist die Formtreue selbst bei einer hohen Reproduktionsstückzahl gewährleistet. Ferner ergibt sich an der bedruckten Seite der Farbbildfolie eine gute und schnelle Wärmeableitung.As an advantageous embodiment of the method, the relief shape used can be galvanized or at least formed entirely of metal on its shaping surface. This ensures shape accuracy even with a high number of reproductions. Furthermore, good and rapid heat dissipation results on the printed side of the color picture film.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert, die einen schematischen Schnitt einer Anordnung zur Durchführung des Verfahrens in auseinandergezogener Darstellung zeigt.The invention is explained in more detail below using exemplary embodiments with reference to the drawing, which shows a schematic section of an arrangement for carrying out the method in an exploded view.

Über eine die Oberflächengestaltung eines Original-Ölgemäldes oder z. B. Krokodilleder als Negativform wiedergebende Reliefform 1 wird eine Farbbildfolie 2 mit der bedruckten Seite 3 nach unten gelegt. Auf die Farbbildfolie 2 wird eine Verstärkungsschicht 9 gelegt, die aus einem leinwandartigem Gewebe und an ihrer der Farbbildfolie 2 zugewendeten Seite aus einer dünnen dielektrisch erwärmbaren Beschichtung besteht, über der sich wiederum eine plane Druckausgleichsplatte 7 aus geschlossenzelligem Schaumstoff, welcher dielektrisch nicht erwärmbar ist, befindet.About the surface design of an original oil painting or z. B. crocodile leather as a negative form reproducing relief form 1, a color image film 2 is placed with the printed side 3 down. A reinforcement layer 9 is placed on the color picture film 2, which consists of a canvas-like fabric and on its side facing the color picture film 2 consists of a thin, dielectric, heatable coating, over which there is in turn a flat pressure compensation plate 7 made of closed-cell foam, which is not heatable by dielectric means .

Die Herstellung der Reliefform 1 erfolgt nach bekannten Verfahren. Beispielsweise kann von dem Original-Ölgemälde ein Negativ-Weichabguß aus Silikonkautschuk oder aus Polyesterharz hergestellt werden. Das Bedrucken der Farbbildfolie 2 erfolgt beispielsweise nach dem Offset-Verfahren, wobei eine Farbaufnahme des Original-Ölgemäldes mit äußerst genauen Farbwerten ohne Lichtreflexionen zu genau maßgetreuen Offsetfilmen in vier oder mehr Farben verarbeitet wird. Selbstverständlich ist hierbei auf genaue Maßhaltigkeit zu achten. Sowohl bei der Herstellung dieser Offsetfilme als auch bei der Herstellung der Reliefform 1 können von vornherein Paßmarkierungen außerhalb des Bildfelds vorgesehen werden, die dann das Ausrichten der Farbbildfolie 2 gegenüber der Reliefform 1 erleichtern.The relief mold 1 is produced by known processes. For example, a negative soft cast made of silicone rubber or polyester resin can be made from the original oil painting. The color image film 2 is printed, for example, using the offset method, with a color image of the original oil painting having extremely precise color values being processed without light reflections to give accurately dimensioned offset films in four or more colors. Of course, it is important to pay attention to exact dimensional accuracy. Both in the production of these offset films and in the production of the relief mold 1, it is possible from the outset to provide registration marks outside the image field, which then make it easier to align the color film 2 with the relief mold 1.

Zur Durchführung des Verfahrens werden eine unterhalb der Reliefform 1 angeordnete Elektrode 4 einerseits und eine oberhalb der Druckausgleichsplatte 7 angeordnete Elektrode 5 an einen Hochfrequenzgenerator 6 angeschlossen. Die Elektroden 4, 5 werden einander angenähert, bis über die Druckausgleichsplatte 7 sowie die Verstärkungsschicht 9 ein vorgegebener Druck auf die Farbbildfolie 2 sowie die Reliefform 1 ausgeübt wird. Durch kurzzeitiges Einschalten des Hochfrequenzgenerators 6 werden die Farbbildfolie 2 und die Beschichtung der Verstärkungsschicht 9 dielektrisch auf ihre Erweichungs- bzw. Verschweißungstemperatur erwärmt. Die Farbbildfolie 2 verformt sich in die negativ ausgebildete Formungsfläche der Reliefform 1 hinein, während die Verstärkungsschicht 9 gleichzeitig mit der nicht bedruckten Seite der Farbbildfolie 2 verschweißt wird. Falls die normale Rauhigkeit des Originalgemäldes und damit der Formungsfläche der Reliefform 1 nicht dafür ausreichen sollte, die Abfuhr der in den Vertiefungen unterhalb der Folie eingeschlossenen Luft sicherzustellen, können mikroskopisch kleine Luftkanäle in der Reliefplatte 1 senkrecht zu der Elektrode 4 ausgebildet werden. Ferner kann auch die Reliefform 1 mikroskopisch porös ausgebildet werden, so daß die Luft an der ganzen Fläche der Farbbildfolie 2 ausweichen kann. Die Elektrode 5 kann je nach den Gegebenheiten so ausgebildet werden, daß eine gleichmäßige homogene Erwärmung der Folie 2 über ihre ganze Stärke und ihre ganzen Ausmaße hinaus gewährleistet ist. Durch geeignete Unterteilung der Elektrode 5 kann jedoch auch eine etwas höhere oder etwas früher einsetzende Erwärmung in der Flächenmitte der Farbbildfolie 2 erfolgen, wenn eine entsprechend zeitlich aufeinanderfolgende Einschaltung der sich ergebenden Teilelektroden vorgenommen wird.To carry out the method, an electrode 4 arranged below the relief form 1 and on the one hand an electrode 5 arranged above the pressure compensation plate 7 are connected to a high-frequency generator 6. The electrodes 4, 5 are brought closer to one another until a predetermined pressure is exerted on the color image film 2 and the relief mold 1 via the pressure compensation plate 7 and the reinforcing layer 9. By briefly switching on the high-frequency generator 6, the color picture film 2 and the coating of the reinforcement layer 9 are heated dielectrically to their softening or welding temperature. The color picture film 2 deforms into the negatively formed forming surface of the relief mold 1, while the reinforcement layer 9 is simultaneously welded to the non-printed side of the color picture film 2. If the normal roughness of the original painting and thus the shaping surface of the relief mold 1 should not be sufficient to ensure the removal of the air enclosed in the depressions below the film, microscopic air channels can be formed in the relief plate 1 perpendicular to the electrode 4. Furthermore, the relief shape 1 can also be made microscopically porous, so that the air can escape over the entire surface of the color image film 2. Depending on the circumstances, the electrode 5 can be designed in such a way that a uniform, homogeneous heating of the film 2 is ensured over its entire strength and its entire dimensions. Appropriate subdivision of the electrode 5 can, however, also result in a somewhat higher or somewhat earlier heating in the middle of the surface of the color image film 2 if the resulting partial electrodes are switched on in a corresponding time sequence.

Die nach dem Verfahren verformte bedruckte Farbbildfolie 2 ergibt eine sehr genaue Nachbildung des Originals mit den feinsten Strukturen, so daß auch die nahezu glatt wirkenden Oberflächenformen beispielsweise bei der Maltechnik des 19. Jahrhunderts originalgetreu reproduzierbar sind. Der Echtheitscharakter wird weiterhin durch das von rückwärts sichtbare Gewebe der Verstärkungsschicht 9 unterstrichen.The printed color image film 2 deformed by the process results in a very precise replica of the original with the finest structures, so that even those that look almost smooth Surface shapes, for example, can be reproduced true to the original in the painting technique of the 19th century. The authenticity character is further emphasized by the fabric of the reinforcing layer 9 which is visible from the rear.

Beispielexample

Ein HF-Generator 6 mit einer Leistung von 40 KW und einer Frequenz von 27,12 MHz weist eine Elektrodenfläche von 50 x 50 cm auf, wobei die Elektroden 4, 5 mit einer Kraft von 300 KN/cm2 gegeneinander zu beaufschlagen sind. Die Farbbildfolie 2 besteht aus PVC von 0,2 mm Dicke und ist auf einer Seite im 8-Farben-Granolitho-Kunstdruck rasterlos bedruckt. Die Dicke der Druckausgleichsplatte 7 beträgt 20 mm und entspricht etwa derjenigen der Reliefform 1. Das Material der Verstärkungsschicht 9 besteht aus leinwandbindigem Gewebe aus Nylon mit einer PVC-Beschichtung von 0,1 mm Dicke. Nach der Beaufschlagung der Elektroden 4, 5 wird 30 sek. HF-Energie eingespeist. Nach Abschaltung und Auseinanderfahren der Elektroden 4, 5 erhält man eine originalgetreue Oberflächenstruktur der Farbbildfolie 2 und eine vollflächige Verschweißung mit der Verstärkungsschicht 9. Die so erhaltene Gemäldeimitation wird auf einen üblichen Holzrahmen genagelt.An HF generator 6 with a power of 40 KW and a frequency of 27.12 MHz has an electrode area of 50 x 50 cm, the electrodes 4, 5 having to be acted upon with a force of 300 KN / cm 2 . The color picture film 2 consists of PVC with a thickness of 0.2 mm and is rasterlessly printed on one side in 8-color granolitho art print. The thickness of the pressure compensation plate 7 is 20 mm and corresponds approximately to that of the relief form 1. The material of the reinforcing layer 9 consists of canvas-binding fabric made of nylon with a PVC coating of 0.1 mm thickness. After the electrodes 4, 5 have been applied, 30 sec. RF energy fed. After the electrodes 4, 5 have been switched off and moved apart, a surface structure of the color image film 2 that is true to the original and a full-surface welding with the reinforcing layer 9 are obtained. The imitation painting obtained in this way is nailed onto a conventional wooden frame.

Claims (3)

1. A process of reproducing oil paintings or forms of a similar surface structure under utilization of a relief form taken from an original and a smooth thermoplastic color image film, which has been printed in a manner corresponding to the original, with the film being placed under fitting alignment onto the relief form and being shaped, together with a back reinforcing layer, under heating in accordance with the surface structure of the original, characterized in that the color image film consists of a material adapted to be dielectrically heated through high frequency waves, preferably polyvinyl chloride, in that the reinforcing layer consists of a canvaslike fabric with a thin coating of a material adapted to be dielectrically heated through high frequency waves as well as to be welded to the color image film, preferably polyvinyl chloride, and in that, for dielectric heating, the reinforcing layer with its thin coating is placed on the back side of the color image film and, during heating, the back side of fabric of the reinforcing layer is acted upon via a pressure equalization plate of foam material with closed cells, which just like the relief form consists of a material that is not, or not to an extent worth mentioning, heatable dielectrically through high frequency waves, preferably silicon rubber.
2. The process of claim 1, characterized in that the relief form consists of metal at least on its side facing the color image film.
3. The process according to one of claim 1 or 2, characterized in that the pressure equalization plate (7) and/or the reflief form (1) are covered by an electrode (5 or, resp., 4) each, which is divided up into partial electrodes, and in that opposing pairs of partial electrodes of the electrodes (5, 4) or, resp., the partial electrodes of an electrode are switched on in timed succession.
EP79104328A 1978-11-30 1979-11-06 Process for reproducing oil paintings or similarly structured pictures Expired EP0011731B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104328T ATE3520T1 (en) 1978-11-30 1979-11-06 METHOD OF REPRODUCTION OF OIL PAINTINGS OR SIMILAR STRUCTURED FORMATIONS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2851875 1978-11-30
DE2851875A DE2851875C2 (en) 1978-11-30 1978-11-30 Reproduction method for oil paintings or the like

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EP0011731A1 EP0011731A1 (en) 1980-06-11
EP0011731B1 true EP0011731B1 (en) 1983-05-25

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EP79104328A Expired EP0011731B1 (en) 1978-11-30 1979-11-06 Process for reproducing oil paintings or similarly structured pictures
EP79104780A Expired EP0011867B1 (en) 1978-11-30 1979-11-29 Process for reproducing oil paintings or the like

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US (2) US4308224A (en)
EP (2) EP0011731B1 (en)
JP (2) JPS564500A (en)
AT (2) ATE3520T1 (en)
AU (1) AU533062B2 (en)
DE (3) DE2851875C2 (en)

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Also Published As

Publication number Publication date
JPH0117880B2 (en) 1989-04-03
ATE6234T1 (en) 1984-03-15
DE2851875C2 (en) 1983-11-10
ATE3520T1 (en) 1983-06-15
DE2965530D1 (en) 1983-07-07
EP0011731A1 (en) 1980-06-11
EP0011867B1 (en) 1984-02-15
JPS564500A (en) 1981-01-17
DE2851875A1 (en) 1980-06-04
JPS5581200A (en) 1980-06-18
JPS5732000B2 (en) 1982-07-08
EP0011867A1 (en) 1980-06-11
AU533062B2 (en) 1983-10-27
AU5330679A (en) 1980-06-05
US4308224A (en) 1981-12-29
US4285744A (en) 1981-08-25
DE2966687D1 (en) 1984-03-22

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