EP1995060A1 - Procédé destiné à influencer la capacité de maintien et/ou de dépose de la couleur de formes imprimées et dispositif d'impression - Google Patents

Procédé destiné à influencer la capacité de maintien et/ou de dépose de la couleur de formes imprimées et dispositif d'impression Download PDF

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Publication number
EP1995060A1
EP1995060A1 EP07010125A EP07010125A EP1995060A1 EP 1995060 A1 EP1995060 A1 EP 1995060A1 EP 07010125 A EP07010125 A EP 07010125A EP 07010125 A EP07010125 A EP 07010125A EP 1995060 A1 EP1995060 A1 EP 1995060A1
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EP
European Patent Office
Prior art keywords
printing
ink
layer
printing plate
ability
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07010125A
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German (de)
English (en)
Inventor
Ernst-Rudolf Dr. Weidlich
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP07010125A priority Critical patent/EP1995060A1/fr
Publication of EP1995060A1 publication Critical patent/EP1995060A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/02—Letterpress printing, e.g. book printing
    • B41M1/04—Flexographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing

Definitions

  • the invention relates to a method for influencing the ink-holding and / or the ink-dispensing ability of printing plates as well as a printing device.
  • the printing result of a printing process depends on many parameters, whereby these parameters can roughly be subdivided into three areas, namely the color, the printing form and the printing substrate.
  • the color reflects the information content imparted to the printing form in the various types of printing, such as intaglio, offset and flexo, on the substrate, i. the ink is transferred to the printing material at the intended location according to the information stamp on the printing plate.
  • the "source data" for printing is different educated.
  • the information of the source data is realized by recesses, which are also referred to in the professional world as "wells". These pits are changed, depending on the information to be transmitted, in aperture size in the pits and in the depth of the pits. The position and the maximum size of this single information depends on the selected grid of the pits and the local information strength.
  • the wells are in gravure printing with the printing medium, ie the ink filled.
  • the printing and non-printing parts of the printing form are in one plane.
  • the printing parts of the printing form show a water-repellent, ie hydrophobic and therefore oleophilic behavior
  • the non-printing parts of the printing form have a hydrophilic and thus oleophobic behavior.
  • the ink is absorbed in the wells or wells
  • the ink is absorbed in or from said hydrophobic surfaces and transferred to the substrate during the printing process.
  • flexographic printing printing forms are used, also called clichés, which are made of rubber or photopolymers.
  • flexographic printing which also falls into the genre of high pressure, the information to be printed is transmitted to the printing material according to the information designed, protruding printing elements, wherein the protruding printing elements have been provided before the printing process with the ink.
  • the printing ink used is of extraordinary importance, namely the physical and / or chemical properties of the printing inks used. But also the substrate to which the ink is transferred, also determines with its geometric and chemical surface texture the appearance or the quality of the pressure as such.
  • the substrate to which the ink is transferred also determines with its geometric and chemical surface texture the appearance or the quality of the pressure as such.
  • a determining component for the quality of a color transfer from the printing plate to the printing material is the surface tension, namely the ink, the printing plate and the printing material itself. It has been recognized that the surface tension decisively characterizes the quality of the individual printing steps, during the printing process is required that the ink is transferred as well as possible and repeatable on the surface of the printing material.
  • an optimal vote of the three components color, printing form and substrate can not or only insufficiently be made. It is also technically and procedurally unrealizable that the three components are independent of each other, each on the printing process to be performed, are tuned and would be adjustable in one step.
  • the inventive method characterized in that on the outer layer at least a coating layer whose outer surface is the contact surface to the ink is applied, wherein the coating layer is physically and / or chemically influenced from the outside so that the ink-holding and / or the ink-dispensing ability of the printing plate is selectively adjustable.
  • the advantage of the method according to the invention consists essentially in the fact that the coating layer by appropriate physical and / or chemical influence from the outside on the specially performed printing process, i. can be tailored to the ink and the substrate targeted.
  • the process control according to the invention it is also possible to dynamically control the physical and / or chemical influence even during the printing process so that certain areas of the printing form are increased in their color retention capacity by the dynamic control or certain areas of the printing form with respect to it Farbabgabelot be reduced or vice versa.
  • coating layer areas of different ink retention and / or ink-dispensing capability of the printing form are formed on a printing form.
  • a plurality of stacked Provide tempering layers each having different color retention and / or ink-releasing ability.
  • the coating layer on the otherwise imaged printing form can be applied.
  • This is advantageously done by a physical process known in the art as “Physical Vapor Deposition PVD” or in the prior art, if it is a chemical process, “Chemical Vapor Depositon CVD”. It should be noted that, depending on the trainee compensation layer, virtually any known in the art PVD or CVD method can be realized. Coating techniques of this kind are, for example, from the publication of Hans K.
  • Pulker et al. Wear-resistant coatings using the CVD / PVD method, Contact & Study, Volume 188, expert verlag , Sindelfingen, known. In the broadest sense, this also includes the application of a coating layer or the application of tempering layers on a printing plate by means of galvanic processes.
  • the coating layer itself on the imaged printing plate is not just a side effect of Invention, but since the application must always take place after the imaging of the printing plate, this application process is immanent highest precision, especially since the targeted training of the coating layer can also interact directly with the chemical properties or chemical constituents of the ink, ie the color retention and / or can influence the Farbabgabelot targeted. Therefore, the coating layer may itself be different for the different possible printing inks of a multi-color printing, as has already been indicated in another context above.
  • the influence of the color retention and / or the Farbabgabefit the coating layer by varying an applied electrical voltage can be done with the example.
  • the viscosity of the ink varies even during the printing process and for certain inks but also for certain Areas of the printing form can be set differently, ie even with a multi-color printing for the different inks themselves, which are used.
  • the influence on the color retention and / or the ink-dispensing ability of the coating layer can also be done by varying a light incident on the coating layer, ie by controlling the intensity of light incident on the coating layer on the printing plate during the printing process can also by appropriate light influencing the printing plate in dependence For example, a change in the viscosity and thus the color transfer behavior of the printing forme to be effected on the substrate from the printing ink used.
  • the coating layer can be influenced in such a way that a variation by changing the electric field, the color retention and / or the Farbabgabeone is selectively adjustable, which also not only applies to the entire imaged printing form, but also for individual areas of the printing form is possible and also depending on the ink used and also depending on the different colors of the inks in a multi-color printing.
  • the substantive composition of the coating layer depends both on the printing plate used for a particular printing technique selected and on the color used and ultimately also on the printing substrate itself.
  • the applied on the printing plate inventive coating layer is but in the invention is the essential size, since just the Farbhalte- and / or the Farbabgabeone can be influenced by deliberate change in their physical and / or chemical behavior.
  • the coating layer advantageously consists of a polymerizable, organic compound which has a carbon double bond and a functional group.
  • a coating layer formed in this way can be applied by means of the previously described known PVD or CVD methods, these techniques, as appropriate Type of coating to be applied partially require an application mechanism under an inert gas atmosphere.
  • the functional group of the coating layer may, for example, advantageously be an oxygen- and / or nitrogen- and / or sulfur- and / or phosphorus-containing group, with the appropriate choice of the functional group being ultimately selected depending on the printing ink but also, for example, depending on the printing for the various printing techniques and ultimately the substrate.
  • a coating layer is applied, whose outer surface is a contact surface to the ink, wherein the coating layer is designed such that a Farbhalte- and / or ink-dispensing ability of the printing plate can be influenced.
  • the printing device and printing form according to the invention may be designed for all known printing techniques, i. Offset printing machines with offset printing form, gravure printing machines with gravure printing form and also high-pressure printing machines with high-pressure printing form including a flexographic printing machine with flexographic printing plate.
  • the printing device for varying the ink holding and / or the ink-dispensing ability of the printing plate in the range between a color pan, in which the printing plate for receiving the ink is at least partially immersed, and a color doctor, the subsequent color of the printing plate removed, applied a variable voltage.
  • the electrical voltage can, for example, in the area between the ink pan and the doctor blade control done so that there is an increased adhesion of the ink on the annealing layer, whereas in the range from behind the squeegee up to and including the substrate, the voltage can be controlled that there is an increased release of the color.
  • different charges can be capacitively constructed, for example, by means of a variation of the electrical voltage via counterelectrodes, which can be, for example, a large area, which are at the opposite electrical potential and thus a variation of the color retention by appropriate variation of the charge. and / or the ink-dispensing ability of the tempering layer.
  • a light source can be provided whose light rays are at least partially directed to the coating layer, wherein by varying the light source or the light intensity, the Farbhalte- and / or inking ability of the coating layer can be changed.
  • Light or light source here means not only light in the visible range, but also light in the UV range and in the IR range and also light in the visible light range can as light specific wavelengths or wavelength ranges, depending on the color of the ink used and depending on the chemical and / or physical composition of the printing ink.
  • a printing form 11 of a printing device or printing machine 10 is in gravure regularly from a printing cylinder having an at least outer layer 12 made of copper or zinc, which is optionally provided after imaging with a chrome layer or a layer of hard material to the pressure life enlarge.
  • the imaging is formed, i. imprinted the information to be displayed later on a substrate 22 after completion of the printing process.
  • gravure printing imaging takes place today either by mechanical training of trained in a grid on the surface of the printing plate 11 wells or wells 13 different depth and opening width, and that classic so-called.
  • Engraving stylus which have an engraving tool in the form of a diamond at the top .
  • the outer layer 12 in which the wells 13 are formed provided with a hard metal layer, eg. Chromium.
  • the printing plate 11 after it has been imaged and optionally provided with a chromium layer or a hard material layer, a thereon applied annealing layer 15, the course also the walls and the bottom of the wells 13 of the gravure printing form covered.
  • the above-described printing apparatus 10 as typically used for gravure printing, is disclosed in U.S. Patent Nos. 4,199,774 Fig. 1 and 3 shown. It can be seen that the printing plate 11 of the printing device 10 is formed regularly as a rotatable cylinder, the first in a known manner prior to the execution of a printing operation is imaged by formation of wells 13 in the outer layer 12 of the printing plate 11. Between the imaged printing plate 11 and a counter-pressure means, here in the form of a likewise rotating counter-pressure cylinder 23, the medium to be printed 22 or the printing material 22 is positioned.
  • the above-described outer layer 12 of the printing plate 11 is the layer in which the said wells 13 or depressions are formed during gravure printing in the course of the imaging of the printing plate 11, by the engraving means not shown here, such as diamond stylus (mechanical Engraving) or by means of laser beams, in which the wells 13 are prepared by local evaporation of the outer layer 12.
  • the outer layer 12 of the printing plate 11 is optionally provided after imaging with a hard material layer, s. above, and thereafter provided with an outer coating layer 15.
  • the outer surface 16 of the tempering layer is the contact surface to the printing ink 14, which is initially located in a paint pan 17.
  • the cup 13 In position a., Fig. 2 and 3 , the cup 13 is filled when passing through the ink tray 17 with ink 14. As a result of the rotation of the printing plate 11, the cup 13 reaches the position b. In this position, the well 13 is subjected to an electrostatic influence via a counter electrode 26, which is connected by means of an electrical voltage applied between the printing form and the electrode Tension 25 ensures that the ink 14 is fixed in the well 13. In this position, the discharge or holding capacity of the printing ink 14 in the well 13 is decisively influenced, by suitable adjustment or control of the applied electrical voltage.
  • the position d. taken in which the medium to be printed 22 and the substrate 22 comes into contact with the ink 14 in the well 13 and the ink 14 is liable to the substrate 22 and can also infiltrate slightly into the substrate 22.
  • the discharge of the ink 14 from the well 13 on the substrate 22 influenced such that the most complete emptying of the cup 13 of ink 14 can be done.
  • the tempering layer 15 is carried out by means of known layering techniques on a substrate, for example. Applied by means of the known PVD or CVD techniques.
  • the tempering layer 15 itself may, for example, consist of a polymerizable, organic compound having a carbon double bond and a functional group having.
  • the functional group may be an oxygen and / or nitrogen and / or sulfur and / or phosphorus-containing group. Instead of the functional group, a trifluoromethylene group may also be provided.

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EP07010125A 2007-05-22 2007-05-22 Procédé destiné à influencer la capacité de maintien et/ou de dépose de la couleur de formes imprimées et dispositif d'impression Withdrawn EP1995060A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07010125A EP1995060A1 (fr) 2007-05-22 2007-05-22 Procédé destiné à influencer la capacité de maintien et/ou de dépose de la couleur de formes imprimées et dispositif d'impression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07010125A EP1995060A1 (fr) 2007-05-22 2007-05-22 Procédé destiné à influencer la capacité de maintien et/ou de dépose de la couleur de formes imprimées et dispositif d'impression

Publications (1)

Publication Number Publication Date
EP1995060A1 true EP1995060A1 (fr) 2008-11-26

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EP07010125A Withdrawn EP1995060A1 (fr) 2007-05-22 2007-05-22 Procédé destiné à influencer la capacité de maintien et/ou de dépose de la couleur de formes imprimées et dispositif d'impression

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EP (1) EP1995060A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262475A2 (fr) * 1986-10-03 1988-04-06 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Machine pour l'impression
EP0363932A2 (fr) * 1988-10-14 1990-04-18 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Forme d'impression
EP0872339A1 (fr) * 1997-04-18 1998-10-21 Eastman Kodak Company Cylindres et manchons à base d'un alliage de zircone pour l'enregistrement et l'impression lithographique
DE19900049A1 (de) * 1998-01-07 1999-07-08 Eastman Kodak Co Eloxiertes lithographisches Zirkonium-Druckglied und Anwendungsverfahren
US6447978B1 (en) * 1999-12-03 2002-09-10 Kodak Polychrome Graphics Llc Imaging member containing heat switchable polymer and method of use
EP1431031A2 (fr) * 2002-12-19 2004-06-23 Heidelberger Druckmaschinen Aktiengesellschaft Forme d'impression et procédé permettant de modifier ses caracteristiques de mouillage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262475A2 (fr) * 1986-10-03 1988-04-06 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Machine pour l'impression
EP0363932A2 (fr) * 1988-10-14 1990-04-18 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Forme d'impression
EP0872339A1 (fr) * 1997-04-18 1998-10-21 Eastman Kodak Company Cylindres et manchons à base d'un alliage de zircone pour l'enregistrement et l'impression lithographique
DE19900049A1 (de) * 1998-01-07 1999-07-08 Eastman Kodak Co Eloxiertes lithographisches Zirkonium-Druckglied und Anwendungsverfahren
US6447978B1 (en) * 1999-12-03 2002-09-10 Kodak Polychrome Graphics Llc Imaging member containing heat switchable polymer and method of use
EP1431031A2 (fr) * 2002-12-19 2004-06-23 Heidelberger Druckmaschinen Aktiengesellschaft Forme d'impression et procédé permettant de modifier ses caracteristiques de mouillage

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