Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
  • B41M3/14—Security printing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
  • B42D25/387—Special inks absorbing or reflecting ultraviolet light
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
  • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
  • B41F23/044—Drying sheets, e.g. between two printing stations
  • B41F23/0443—Drying sheets, e.g. between two printing stations after printing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
  • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
  • B41F23/044—Drying sheets, e.g. between two printing stations
  • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
  • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
  • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
  • B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
  • B42D25/29—Securities; Bank notes

Definitions

• the invention relates to a method for producing a value document, such as a banknote, a document or a document of identification.
• the printing process is usually carried out in several printing steps, with a variety of successive printing and finishing processes can be used.
• One of the first steps here is usually a monochrome or multicolor background printing in the offset and / or letter set method.
• the printing equipment used for this can vary greatly and depends on the following parameters:
• the type of value document substrate used e.g., cotton fiber based substrates; mixed fiber based substrates; substrates
• substrates to be printed having a nonhomogeneous structure for example paper substrates provided with a film element, partially pre-printed substrates;
• substrates to be printed which have at different locations a different pH and / or a different paper moisture.
• the printing equipment of the following
• Pressure steps are adjusted, which is associated with high costs and high costs.
• the laying down of printing ink here denotes the phenomenon that the still wet printing ink forms on the next printed sheet and disturbs the printing result there.
• the drying of a printed value document substrate can be further accelerated by the addition of metal-containing driers.
• Oxidatively drying inks ie inks that are not UV inks or UV inks usually contain a drier or siccative. Dry substances are, in particular, organic salts of certain metals such as cobalt (eg cobalt octoate, cobalt naphthenate), manganese, calcium (eg calcium octoate), zirconium or cerium.
• Metal-containing driers develop their effect only in the presence of oxygen.
• the drying of a printed value-added substrate can be accelerated by the addition of peroxide-containing substances, such as inorganic or organic peroxides. These decompose free radical oxygen and thus accelerate the oxidative drying of the ink layer. This also works in places where air or oxygen deficiency prevails, consequently also in non-impacting substrates and in high or large value document stacks.
• peroxide-containing substances of color may be added relatively shortly before printing, because the color can not be stored for a longer period of time by the onset of the addition of the peroxide chemical reaction.
• the drying of a printed value document substrate can also be accelerated by the use of UV-drying undercoats or hybrid UV systems instead of oxidative drying systems.
• a first aspect of the invention relates to a method for producing a value document, comprising:
• step b) the treatment of the value document substrate with UV radiation and additionally with ozone takes place.
• the additional treatment with ozone is preferably carried out by pressurizing the value document substrate with ozone in room air at a concentration in the range from 1 to 15 ppm.
• step b) the treatment with UV radiation is carried out by a (simul- tan) printing machine equipped with a UV drying system, wherein preferably a UV dose rate of 10 mj / cm 2 to 200 mj / cm 2 per page is selected. A UV dose rate of 15 mj / cm 2 to 80 mj / cm 2 per side is particularly preferred.
• the UV dose can be measured by means of a photochromatic film, for example by means of a 70 mm ⁇ 19 mm measuring strip "tesa® UV Strip" from Dr. Hönle AG.
• step c) drying is preferably carried out at room temperature. Furthermore, it is preferred to carry out the drying of the value documents in the form of a document of value document, wherein the document of value documents in particular special 200 to 10,000 sheets, preferably 5000 to 7000 sheets, has.
• a second aspect of the invention relates to a method for producing a value document, comprising:
• the inventive method is applicable to all standard value document substrates, in particular paper substrates, polymer substrates and so-called hybrid substrates, which are to be understood composite film substrates, either a paper-based core and polymer-based outer layers or a core of a plastic material and outer layers on a paper basis. It is preferred to use substrates based on cotton fibers.
• the substrate may have certain coatings, impregnations or imprints and / or security elements or film elements.
• a polymer substrate or composite substrate having a core of paper and polymer-based outer layers
• This layer applied to the polymeric material is commonly referred to as the ink accepting layer.
• ink receiving layers are generally dispensable, but the paper substrate can be completely or partially coated in order to provide it with certain properties, for example luminescent properties, due to luminescent substances applied.
• Oxidatively drying inks include (or consist of the following components): oxidatively drying film formers, (color) pigments, fillers, solvents, and additives.
• the film former is the constituent of the binder which is essential for the formation of the film (see also: Thomas Brock: “Lehrbuch der Lacktechnik", 2nd edition, Curt R. Vincentz Verlag, 2000, page 190)
• Film formers are in particular macromolecular organic substances and according to this standard, the term "non-volatile content" of a coating material without pigment and filler but including plasticizers, driers and other non-volatile auxiliaries To understand 4618.
• oxidatively drying film former which can be used for the oxidatively drying printing ink
• film former molecules which can be linked to aliphatic double bonds by the action of atmospheric oxygen via oxygen bridges are preferred.
• oxidatively drying alkyd resins, Urethanalkyde, epoxy resin esters with unsaturated fatty acids, oil-modified phenolic resins, and natural or synthetic Triglycerides with at least partially unsaturated fatty acid residues as film formers preferred.
• the oxidatively drying ink may preferably comprise driers or siccatives, especially organic salts of certain metals such as cobalt (e.g., cobalt octoate, cobalt naphthenate), manganese, calcium (e.g., calcium octoate), zirconium, cerium, zinc, lead, or iron.
• Organic acids especially higher fatty acids such as linseed oil fatty acid or tall oil fatty acid, rosin acids, naphthenic acid or 2-ethylhexanoic acid can be used to form the organic salts.
• the dry substances catalyze the oxygen transfer from the air by redox reactions and accelerate film formation by polymerization.
• the oxidatively drying printing ink is in particular a background printing ink.
• the step of treating the printed value document substrate with UV radiation is expediently carried out by using UV drying systems which can be based, in particular, on medium-pressure mercury UV lamps or iron or gallium-doped medium-pressure mercury UV lamps.
• the emitter power per lamp is in the range of 120 W / cm to 250 W / cm, preferably 180 W / cm.
• a suitable emitter system for example, offered by the company IST METZ GmbH units BLK-5 or BLK-2.
• the method expediently takes place at a printing speed of 8000 to 12000 sheets / h, in particular 10,000 sheets / h, and a setting of a single-jet dose rate within a range of 4 mj / cm 2 to 100 mj / cm 2 .
• the step of drying the UV-treated printed value-added substrate is at room temperature or elevated temperature.
• Room temperature is understood herein to mean a temperature of 20 ° C.
• the drying at elevated temperature can be carried out in particular at a temperature in a range of 35 ° C to 40 ° C.
• the step of drying the value documents in the form of a value document stack In order to avoid the shrinkage of the value document substrate, it is preferred to carry out the step of drying the value documents in the form of a value document stack.
• the value document stack may in particular have 200 to 10,000 signatures, preferably 5000 to 7000 signatures. A value document stack with approximately 6000 signatures is particularly preferred for drying. Furthermore, it is preferred that the stack core temperature does not exceed a temperature of 40 ° C.
• the drying of the value documents in the form of a document of value document is preferably carried out at room temperature.
• step b) of treating the printed value-document substrate with ozone is expediently carried out by subjecting the value-document substrate to ozone in room air with a concentration in the range from 1 to 15 ppm, a concentration of about 10 ppm being particularly preferred. Furthermore, it is preferred to carry out the production of the ozone directly in the immediate vicinity of the paper surface, for example by the UV radiation emitted by the UV lamps in the presence of (air t) oxygen. Further embodiments and advantages of the invention are explained below in conjunction with the figures.
• Fig. 3 shows the results of the test series according to embodiment F, which were obtained on the basis of an organic colored pigment with dry matter.
• a suitable for printing with conventionally drying inks suitable simultaneous printing machine with retrofitted UV drying system of IST Metz ("BLK-5", two spotlights per side with a radiator output of 180 W / cm) was used.
• Embodiment A Cotton velor paper was printed on both sides in a simultaneous sheetfed press with one offset and two letter set inks.
• the paints contained 3% by weight cobalt / manganese salt drier.
• the printing speed was 8000 sheets / h.
• the signatures were dried at room temperature in stacks of 6000 sheets each and could be further processed by intaglio printing after 48 hours at the earliest. After connecting two UV aggregates (IST Metz, model "BLK-5”) on each side at 40% of the maximum output and subsequent drying at room temperature in stacks of 6000 sheets each, further processability by intaglio printing was achieved within 20 hours ,
• the paper substrate is not appreciably changed in its dimension or spatial dimension due to the UV doses required to reduce the drying time to less than 20 hours, while a higher heat input by hot air very well to a higher shrinkage of the Substrate leads.
• the power of the UV lamps can be increased.
• Cotton velor paper was printed on both sides in a simultaneous sheetfed press with three letter set colors each.
• the paints contained 3% by weight cobalt / manganese salt drier.
• the printing speed was 10,000 sheets / h.
• the signatures were dried at room temperature in batches of 6000 sheets each until further processing. Five sheets each from the stack top, the stack center and the bottom of the stack were taken from the stack after one hour, measured and the average of the measured values determined.
• Cotton velvet paper with film elements applied in subregions was printed on both sides in each case with one offset and three letter set inks in a simultaneous sheetfed press.
• the paints contained 3% by weight cobalt / manganese salt drier.
• the printing speed was 8000 sheets / h.
• the film areas that were printed with the wet offset ink were not sufficiently dried in the arrangement of the printed sheets in the stack, so that strong deposition was observed in the stack on the respective next sheet back page.
• the further embodiments D, E and F were carried out on laboratory pressure units.
• the basic procedure was as follows: On a sample printing equipment from IGT Metz, a trial print with an application quantity of the printing ink of 1 g / m 2 was carried out on cotton velvet paper. After drying under the conditions indicated, the printed side was placed on an unprinted piece of paper of the same size and this combination was pressed together. The amount of ink transferred to the previously unprinted paper was used as a measure of drying. This method reflects the real production conditions well, because here too the printed sheets in the next processing step have to withstand a similar load.
• the print strips were dried open in the room air at a temperature of 20 ° C for four hours.
• the print strips were exposed immediately after printing in a continuous UV belt dryer at the indicated UV dose rate.
• the UV lamps used were both normal mercury UV medium-pressure lamps (company IST, spectra type CK) and iron-doped mercury UV medium-pressure lamps (company IST, spectra type CK-II).
• the print strips were also fixed on a metal support for rapid heat dissipation. The temperature of the printing strips reached room temperature again after only 5 to 10 seconds after the dryer had been run through. The strips were then dried next to the reference strips for four hours.
• a black letter set ink based on a carbon black pigment without dry matter was applied to cotton veline substrate with an application rate of 1 g / m 2 and dried in various ways: Reference: Drying for 4 hours at room temperature.
• UV 1 irradiation with a UV dose rate of 70 mj / cm 2 , followed by four hours of drying at room temperature.
• UV 2 irradiation with the double UV dose rate of UV 1, followed by four hours of drying at room temperature.
• UV 3 irradiation with three times the UV dose rate of UV 1, followed by four hours of drying at room temperature.
• Heat 1 drying for one hour at 35 ° C followed by drying for three hours at room temperature.
• Heat 2 drying for two hours at 35 ° C followed by further drying at room temperature for two hours.
• Heat 3 drying for two hours at 35 ° C followed by one-hour drying at room temperature.
• FIG. 1 shows the amount of ink transferred by the pressing onto the unprinted substrate. The larger this is, the worse the color was dried at the time of the knock-off.
• a dry-free paint at room temperature has to dry for at least a week or more until the signatures can be further processed. So there is no industrial production possible.
• the drying in the oven also requires a relatively long drying time and also changes the dimension of the paper substrate.
• a three-hour heat input can not achieve a significant effect compared to the reference.
• UV radiation already achieves a measurable effect.
• Exemplary embodiment E (test series): A black paint composition based on a carbon black pigment containing 3% by weight of a cobalt salt-based dry substance was applied to a cotton wool substrate at an application rate of 1 g / m 2 and dried in various ways:
• UV 2 irradiation with the double UV dose rate of UV 1 followed by four hours of drying at room temperature.
• UV 3 irradiation with the triple UV dose rate of UV 1 followed by four hours of drying at room temperature. one hour drying at 35 ° C followed by further drying at room temperature for 3 hours. drying for two hours at 35 ° C followed by further drying at room temperature for two hours.
• Heat 3 drying for two hours at 35 ° C followed by one-hour drying at room temperature.
• FIG. 2 shows the quantity of ink transferred by the pressing onto the unprinted substrate. The larger this is, the worse the paint was dried. It is thus clear that the UV radiation compared to the reference can achieve effects in the order of magnitude that otherwise can only be caused by heat.
• Exemplary embodiment F test series:
• a red letter set paint based on an organic colored pigment was applied to a cotton wool substrate at an application rate of 1 g / m 2 and dried in various manners.
• the paint contained 3% by weight of dry matter:
• UV 2 irradiation with the double UV dose rate of UV 1 followed by four hours of drying at room temperature.
• UV 3 irradiation with the triple UV dose rate of UV 1 followed by four hours of drying at room temperature.
• Heat 1 Drying for one hour at 40 ° C followed by three-hour drying at room temperature.
• Heat 2 drying at 40 ° C for two hours followed by further drying at room temperature for two hours.
• Heat 3 drying for two hours at 40 ° C followed by one hour of further drying at room temperature.
• Ozone 1 one-minute exposure to ozone in room air with one
• FIG. 3 shows the quantity of ink transferred by the pressing onto the unprinted substrate. The larger it is, the worse the paint has dried.
• UV radiation compared to the reference can achieve effects in the order of magnitude that otherwise can only be caused by heat. Ozone also shows a beneficial effect.

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• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Thermal Sciences (AREA)
• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Finance (AREA)
• Electromagnetism (AREA)
• Printing Methods (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

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Citations (1)

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• 2012
  • 2012-05-29 DE DE102012010534A patent/DE102012010534A1/de not_active Withdrawn
• 2013
  • 2013-05-14 EP EP13722684.1A patent/EP2888112B1/de not_active Not-in-force
  • 2013-05-14 BR BR112014029183A patent/BR112014029183A2/pt active Search and Examination
  • 2013-05-14 CA CA2870463A patent/CA2870463C/en not_active Expired - Fee Related
  • 2013-05-14 WO PCT/EP2013/001421 patent/WO2013178325A2/de active Application Filing
  • 2013-05-14 MX MX2014014369A patent/MX359340B/es active IP Right Grant
  • 2013-05-14 CN CN201380026395.6A patent/CN104321199B/zh not_active Expired - Fee Related
• 2014
  • 2014-11-07 ZA ZA2014/08152A patent/ZA201408152B/en unknown
• 2015
  • 2015-02-18 HK HK15101789.6A patent/HK1201234A1/zh not_active IP Right Cessation

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