Method for production of partially plated film element

FIELD: technological processes.

SUBSTANCE: digital array of data is created, which defines graphical configuration of partial plating, at that, using digital array, trajectory of tool motion is calculated, as well as control data for tool control, at that tool and single- or multi-layer film carcass are moved in relation to each other in accordance with tool motion trajectory. Tool that is controlled according to control data provides partial discrete de-metalation of metal layer by means of application of wipe-off mask for partial masking of single- or multi-layer film carcass. Foresaid mask is applied by spraying. Single- or multi-layer film carcass is further dried, provided with metal layer, and metal layer is partially removed by flushing method in area of wipe-off mask.

EFFECT: efficiency from production point of view, possibility to apply coating on different surfaces and exclusion of thermal or mechanical effect onto surface.

13 cl, 16 dwg

 

The invention relates to a method and apparatus for the production of partially metallized film element, in particular embossed foil, lamination foil or optically changeable protective element, and partially metallizovannogo film element, in particular embossed foil, lamination foil or optically variable security element.

Document WO 99/13157 describes partially metalized protective foil for securities and the method of production of such foil. This protective foil for implementation in securities or application consists of a transparent basis foil or a deposited metal coating, which contains free from metal region. This work is partially metallizovannoj foil on the basis of the foil in places by a gravure printing method is applied inks with high pigment content, and then dried paint to the formation of porous, embossed color cover. On the thus treated basis foil and then forming a thin metal protective layer. Then lying on the paint layer or embedded in the protective layer is removed by means of washing liquid, possibly in combination with mechanical action. Then the base foil is dried and, if necessary, adjusted by trimming. On the basis of the foil remains is, thus, the metal protective layer on the original is not covered with ink areas, which may have a thickness of from 0.01 to 1 μm.

In document WO 02/31214 A1 shows the following possibility of making partially metallizovannoj foil. In this way initially cleaned and increase the strength of the base material. This step of the method is a prerequisite for good adhesion partially structured metal layer on the substrate.

Before applying the actual functional layer soluble in any solvent, for example water, alcohol, ketone or ether complex, the dye through the method of gravure printing. Then are cleansing and hardening stages.

Subjected to a printing substrate is treated by linearly penetrating plasma or corona discharge. With this processing, the surface of the film is freed from the remnants of printing inks and simultaneously activated, as are formed of the polar group. On this basis, together with the preliminary plasma treatment in vacuum is applied by sputtering or vapor deposition thin metal or metal oxide layer as a substance that increases the adhesion strength. For this approach, in particular, Cr, Al, Ag, Ni, Cu, Ti, TiO2, SiOx, CrOx.

Then a layer of copper (With whom) for the formation of a pattern on the basis of the foil, then the dye is removed by mechanical cleaning, in order to obtain the desired structuring. At this point, you should galvanic pinning pattern during the formation of the metal reinforcing layer on the pattern.

The basis of the invention lies task is to provide a particularly cost-effectively produced, partially metalized film element, in particular a partially metalized embossed foil or lamination foil.

This problem is solved by the method of production of partially metallized film element, which produces a digital array of data that defines a graphical configuration partial metallization, digital array are calculated toolpath and control data for tool management, tool, and one - or multilayer film frame according to the motion path tool move relative to each other, and the tool is controlled according to the control data, produces a partial demeterova metal layer, in particular, by applying the etching solution, or discharge of the resist, or erosion of the metal layer. Next task is solved in a partially metallizovannoj film element, for example an embossed foil or lamination foil, which is produced according to the above SP is soba. The objective of the invention is solved by a further device for the production of partially metallized film element which includes a control device, one or more guide devices and at least one tool, and the control unit calculates from the digital data array that defines the graphical configuration of the partial metallization, the trajectory of the instrument and control data for controlling a tool that move through one or more guide devices tool and a single - or multilayer film frame relative to each other, according to the tool path, the tool is controlled according to the control data, produces a partial discrete demeterova metal layer, in particular, applying the etching solution, or discharge of the resist, or erosion of the metal layer.

The invention can be used not only for the production of embossed or laminating foils, but also be used for the production of any type of decorative or functional films, which contain a partially formed metal layer. An example for this are the stencil film, which are used for decoration of three-dimensional objects through traforato the method.

Further, the invention is applicable for the production of optically variable protective element, which can be applied via the transfer method on the product, for example a banknote, credit card, cash a check or document. Next, there is the ability to apply this optically variable element as a protective element or characteristics of authenticity on the subject, for example on laser disc or on the packaging.

Through the invention achieves the advantage that it is possible to largely automate the production of partially-rich film elements and thus, on the one hand, to increase the speed of the production process and, on the other hand, to reduce the cost of the production process.

Further, in this method it is possible to abandon the use of expensive tools, such as rollers with a mesh surface for gravure printing. It is possible to react more flexibly to changes in production resulting in lower costs of production. Further advantages arise in the use as protective elements. The manufacture of the cushion with mesh surface for gravure printing requires the participation of a specialized supplier.

Further advantages are achieved by the fact that individualization film elements is s can be achieved in a simple way : through changing array of digital data. Thus obtained benefits, particularly for small series and information objects with variable image and content.

Cost reduction is achieved further by the fact that there is no need for reproduction and excluded pre-printing stages.

Preferred embodiments of the invention are given in the dependent claims.

Is appropriate to first provide a film frame basis metal foil layer and then using the tool with digital control, apply on the metal layer etching solution for partial demetilirovania metal layer. After partial demetilirovania etching solution is removed. Alternative it is possible to provide a film frame basis metal foil layer and then apply the mordant resist for partial masking of the metal layer using the tool with digital control. Not covered with a metal layer is then removed by demetilirovania. Further, it is possible using the tool with digital control, apply on a frame basis foil rinse-off mask for partial masking film frame and then to provide film metal layer. Metallic the layer is then partially removed in the area of rinse-off mask by washing.

The above options have a high processing speed. Next, the steps of the method needed to implement these technologies can simply be integrated into existing manufacturing methods partially DRI film elements and, respectively, can be combined with these methods. From this, depending on the problem, you may experience further benefits relative to costs of production.

Is also preferred to provide a film frame basis metal foil layer and to remove then tool metal layer by electric discharge machining.

With this option, there are advantages in production costs, as it can be reduced using etching solutions, mordant of the resist, etc. In the future, the number of required stages of the method is reduced, so that shortens the production time of film elements.

Especially preferred is the fact that as a tool on top of the single - or multi-layer frame moves e carbon pen according to the toolpath and that according to the control data for the partial erosion of the metal layer potential difference is created between the electronic carbon pen and contact mass element. DL the erosion consisting of aluminum metal layer when this is achieved especially good results when the potential difference of 3 to 4V, and for erosion consisting of chromium metal layer is especially good results when potential difference of about 6V.

Further particularly good treatment results can be achieved through what is considered the location of the electronic carbon pen and contact mass element when calculating the toolpath and/or control data.

Turned out to be expedient that the tool partially destroys the metal layer by a laser beam.

The tool can using a roller to put on film frame etching solution, the mordant resist or rinse-off mask. Further, it is also possible that the tool was applied to a film frame etching solution, the mordant resist or rinse-off mask by spraying.

It was found that the method according to the invention is particularly well suited for the production of structured metal layers that have a thickness less than 1 micron.

Applying a metal layer on all planes on the film frame leads to the advantage that can find application particularly simple and economically feasible methods, such as deposition of the metal layer by evaporation. But also partial application of a metal layer (for example, printing of metal pigments) can the t lead to benefits for certain cases of application. Thus it is possible to provide a metal layer only on the areas that, in fact, later must be retained significant metallization. Under certain circumstances, a partial application of the metal layer can further speed up the processing time and save a significant amount of etching solution of mordant resist, etc.

Metal layer, discrete deleteriously by the way, according to the invention may consist not only of metal and metal alloys, but also from any other was highly reflective materials. According to the invention under the metal layer need to understand the film, which consists of was highly reflective material.

Further, the invention is illustrated on a few examples of manufacture when using the accompanying drawings.

Figure 1 shows a schematic cross section of a partially metallized film element according to the invention.

Figure 2 shows the schematic diagram corresponding to the invention of the manufacturing method for the first example of manufacture.

Figure 3 shows a block diagram of the device according to the invention for the production of partially demetallizing film element.

Figa-4d show schematic cross-sectional film elements to illustrate the appropriate izobreteny the manufacturing method according to the second example embodiment of the invention.

Figure 5 shows the schematic diagram corresponding to the invention of the method of manufacturing according to the second example embodiment of the invention.

Figa-6C show schematic cross-sectional film elements for illustration corresponding to the invention of the manufacturing method according to a third example embodiment of the invention.

Fig.7 shows a schematic representation of the method of manufacturing according to a third example embodiment of the invention.

Figa-8C show schematic cross-sectional film elements for illustration corresponding to the invention of the manufacturing method according to a fourth example embodiment of the invention.

Fig.9 shows a schematic representation of the method of manufacturing according to a fourth example embodiment of the invention.

Figure 1 shows the film element 1, which contains the layer 11 of the base, the protective lacquer and/or delete the layer 12, the replication layer 13, the layer 14 of absorption, the intermediate layer 15, a partially reflective layer 16, the intermediate adhesion layer 17 and the adhesive layer 18.

In the case of a film of item 1 deals with the embossed foil, in particular a hot stamping foil, through which is applied a decorative element, formed by layers 12-18.

Layer 11 fundamentals of foil is, for example, of polyethylene. About what is a technology of applying optically variable element to be protective coating object and removed according to the instructions after applying optically variable element on a securable object.

Replication layer 13 consists of a thermoplastic polymer material. In the replication layer 13 through the creaser is embedded one or more diffractive structures in thermoplastic plastic replication layer 13. In the case of these diffractive structures we are talking mainly about the structures by diffraction effects form the hologram, etc. However, it is also possible, instead of the diffraction structures in the layer 13 was introduced Matt structure, microstructure, achromatic symmetric patterns, for example, a sine grating, achromatic asymmetric patterns, for example, brilliant patterns or film.

The layers 14, 15 and 16 form a sequence of thin layers, which produces dependent on the angle of view changes shades through interference. Along with this, presented in figure 1 the possibility of constructing a sequence of thin layers from the layer absorption (mainly with a transmittance of 30 to 50%), a transparent intermediate layer as layer, forming a color change (λ/4 or λ/layer 2), and the reflecting layer, it is also possible to construct a sequence of thin layers of high and viscoplasic layers. This design layers can be waived from the application layer absorption.

The reflective layer 16 is partially what about the metal layer. The reflective layer 16 may consist of one of the following metals or alloy of the following metals: Cr, Al, Ag, Ni, Cu, Ti. The reflective layer 16 is made using one of the methods according to figure 2-9.

From the layers 12, 13, 14 and 15 and the layer 17 could also be abandoned. Further, it is possible to film element 1 was a laminating foil and instead layer 11 of the substrate and the protective and/or deleted layer 12 contained an intermediate adhesion layer.

Figure 2 shows a device for the production of partially metallized film element. The device includes two film rolls 21 and 24, technological position 22 metallization and technological position 23 demetilirovania.

On the technological position 22 metallization cover summed up the film frame with a thin metal layer. On the technological position 22 of the metallization is carried out, mainly, coating on all flat surfaces summed up the film frame by means of sputtering. However, it is also possible that technological position 22 of the metallization is carried out only partial metallization of the film so that, for example, be covered with a mask for spraying parts summed up the film frame.

Further provided with a thin metal film layer frame down in the technology will into the position 23 demetilirovania, at which conduct the discrete demeterova areas of the metal layer. View technological position 23 demetilirovania device shown in figure 3.

It is possible that represented in figure 2, the device contains a further working position, which, for example, are used for the production of layers 12-15 and 17-18 according to figure 1. Next, the production process may also be formed as a discontinuous process, so that in the period between one or several of these technological items, the film leaves and intermediate is stored.

Figure 3 shows a device for the production of partially metallized film element, which contains a control device 33, the source 40 voltage, the contact mass element 39, the switching element 34, the carbon pen 38, the roller 37 and two guide devices 35 and 36.

Next, figure 3 shows a multilayer film frame 30, which consists of a base 32 of a film frame and a metal layer 31. The base 32 of the film frame can, for example, be formed from layers 11-15 according to figure 1.

The control device 33 consists of one or more microprocessors, memory elements and peripheral nodes and compiled on the platform of these means of control programs. The performance of these control programs on the platform t is logical devices causes described in further functions of the control device 33.

In a functional sense, the control device 33 comprises a storage device 332, the device 331 input unit 333 calculates and controller 334.

In the storage device 332 recorded digital data array that define your graphics configuration partial metallization. This digital dataset is created by device 331 input and stored in the storage device.

Device 331 input consists of a device interface for receiving data, for example, via a serial or parallel bus or network of computers. However, it is also possible that the device 331 input contained a graphical user interface through which a user can be specified graphical configuration partial metallization.

Block 333 calculate the counts recorded in the storage device 332 digital data corresponding to the trajectory of the instrument and control data for controlling a tool to hold the tool according to the graphical configuration partial metallization and via the tool to cause the discrete demeterova according to this graphic form.

The controller 334 controls, based on these calculated data, guide devices 35 and 36 so that the carbon pen 38 and film frame 30 move relative to the part of each other according to the toolpath. Next, the controller 334 controls the switching element 34 during this movement, based on the calculated data, so that the carbon pen 38 according to the graphic configuration of the partial metallization causes partial demeterova metal layer 31 by means of electric discharge machining of the metal layer 31.

The switching element 34 converts the control signals of the controller 334 in the voltage pulses which are fed to the electronic carbon Peru 38. The switching element 34 is, for example, from the corresponding transistor circuit or relay.

Mass contact element 39 serves to create a galvanic contact between the metal layer 31 and the source 40 voltage. Mass contact element 39 is, for example, from one or more rollers of electrically conductive material, which are pressed onto the metal layer 31.

A guiding device 35 consists of an actuator with attached electronics control that moves carbon pen 38 transversely to the longitudinal direction of the film. A guiding device 36 consists of an actuator with attached electronics control, which drives the platen 37 and at the same time, causes the movement of the film frame 30 in the longitudinal direction.

Carbon pen 38 about titsa in just a certain interval above the metal layer 31. It is also possible that a guiding device 35 contained a corresponding adjusting device, which continuously monitors and adjusts the interval.

The distance from the carbon pen 38 to the metal layer 31 is, mainly, from 0 to 200 ám.

Voltage source 40 voltage is mainly from 3 to 4, if the metal layer 31 is made of aluminium. Voltage source 40 voltage is, primarily, about 6 In, if the metal layer 31 is composed of chromium.

Next, you can replace the carbon pen 38 pen from another electrically conductive material, for example silver or copper.

It is also possible that the carbon pen 38 could move the guide device 35 not only in the transverse and in the longitudinal direction. In this case, it would also be possible to opt out of the sending device 36 and the roller 37. Carbon pen 38 could be replaced also by a laser which is directed switching element 34 and which destroys metal layer 31 by evaporation.

Through figa-4d and figure 5 explains the following example embodiment of the invention, in which a partial demeterova is made by applying the etching solution.

Figure 5 shows two film rolls 50 and 54, and three working technological positions 51-53.

R is working technological item 51 - this is the technological position of the metallization, which is made as the technological position 22 metallization according to figure 2.

To a working technological position 51 is brought presents on figa film, which consists of the carrier 42 and from the base 43 of the film frame. The base 43 of the film frame can, for example, consist of layers 12-15 according to figure 1. However, it is also possible that the base 43 of the film frame consisted of only the base layer.

On the working technological position 51 is applied to the substrate 43 film metal layer 44. The resulting thus film frame 41 (fig.4b) transmit working on technological position 52.

Working technological position 52 is made as a technological position 23 demetilirovania according to figure 2 with the difference that the mass of the contact element 39 and the carbon pen 38 is replaced by a device that causes the metal layer 44 etching solution according to the control by the switching element 34. Mostly, however, the etching solution is sprayed in the form of droplets on the metal layer 44. The managed switching element 34, the tool includes, for example, piezoelectric element, or the element of evaporation, which creates a pressure pulse in filled with the etching solution chamber when the trigger pulse voltage is, and if this is causing the issue in the form of droplets of the etching solution through the nozzle.

In the context of this application, the spray is an umbrella term for methods of forming the layer of material without contact of the instrument with the coated surface, in particular by spraying through a nozzle. This method of application, in addition to the absence of contact of the tool with the substrate, allows you to apply the desired pattern in accordance with a pattern defined by the digital data array, and a very mobile and economical from the point of view of application, in particular in the choice of the composition of the coating material, and equipment, as a means of inkjet printing high resolution widely available. In addition, this method of coating is applicable to a variety of surfaces, including uneven.

The advantage of spraying is the absence of thermal or mechanical impact on the surface of the coating due to the lack of direct contact with the instrument, as well as efficiency and mobility.

As etching solutions for this method is suitable alkali or acid, for example, a solution of sodium hydroxide or a solution of potassium hydroxide at a concentration of 2-10 wt.%.

As shown in figure 4, the metal layer 44 is demetrious when applying the etching solution in the areas 45.

Treatments is p thus the film frame 41 is supplied to a working technological position 53, touching which we are talking about washing technological position, which removes residues and waste pickling solution from the film frame 41. In the scrubbing process position 53 of the film frame 41 moves, for example, through one or more filled with solvent pools and then dried.

Through figa-6C and 7 is explained with the following example implementation of the invention in which discrete partial demeterova is the application of mordant resist.

Fig.7 shows two film rolls 70 and 75, as well as four working technological positions 71-74.

Working technological position 71 is designed as a working technological position 52, with the difference that instead of the etching solution on the metal layer sprayed the mordant resist. As shown in figa, on film frame 60, which contains the carrier 61, a base 62 of the film frame and the metal layer 63, in the areas 65 sprayed the mordant resist 64.

Mordant the resist 64 is composed of one of the following materials: polyvinyl chloride, acrylates, polyamides, UV acrylates, polyurethanes.

It is also possible that the mordant resist 64 was not sprayed on the metal layer 63, and was transferred to a metal layer 63 by means of a roller. For example, it is possible to powder mordant resist the partially what about is deposited on the metal layer 63 by thermal treatment method laser printing, or through electrocardiographical method.

Then the film is applied to the working technological position 72, concerning which we are talking about technological position heat treatment, which produces thermal hardening of mordant resist 64. From working technological position 72 can also be discarded, depending on the choice of mordant resist.

Then the film is applied to the working technological position 73, which is a technology position demetilirovania. The working process of the position of the metal layer 63 is removed is not protected mordant the resist 64 areas, for example, by acid or alkali. As shown in fig.6b, after processing, thus working in a technological position 73 film contains a partial metal layer 63 only in the areas 65.

Especially preferred is the transfer of mordant resist, with exact dimensions, of existing or pre-printed graphic information, such as alphanumeric or holographic diffraction, or color information, and thus to maintain accurate metallization or demeterova in subsequent processes.

Then the film is applied to the working technological position 74. Working position 74 is washing the technological position, which which destroys the mordant layer of resist 64 by means of a solvent and then drying the film.

However, it is also possible not to bring the film to a working technological position 74 and leave the mordant layer of resist 64 on the film. This course of action proved to be profitable as a mordant layer of resist 64 can be used as an intermediate adhesion layer for further plotted layers. Layer 64 executes, thus, a dual function - mordant layer of resist and the intermediate adhesive layer.

Through figa-8C and figure 9 explains the following example embodiment of the invention, which is a discrete demeterova by applying a rinse-off mask.

Fig.9 shows two film rolls 90 and 95 and four working technological positions 91-94.

To a working technological position 91 is supplied as shown in figa film, which consists of a film frame 80, containing the base 82 of the film frame and the carrier 81. The base 82 of the film frame is made as a basis 43 film frame according to figure 5.

Working technological position 91 is formed as a working technological position 71 in accordance 7 with the difference that working on technological position 91 instead of mordant resist is applied on the film frame 80 rinse-off mask. As shown in figa, working on technological position 91 is applied on the film frame 80 in the areas 85 rinse-off mask 83. Mihama mask 83 is based, mainly on the polymer. As materials for rinse-off mask can be used, for example, methylcellulose, carboxymethylcellulose, sodium salt of polyacrylic acid or polyvinyl-pyrrolidone, along with this polisher and other natural materials, which are film forming and water-soluble.

Then the film is applied to the working technological position 92, which produces hardening of rinse-off mask 83 drying. At the same time from the working technological position 92 might as well give up.

Then the film is applied to the working technological position 93, where we are talking about technological position metallization, when, as shown in fig.8b, summed up the film frame is plated with a metal layer 84. Working technological position 93 may be issued as a working process according to item 51 figure 5.

Then the film is applied to the working technological position 94, concerning which we are talking about washing technological position. Here is removed by washing and subsequent drying of rinse-off mask 83 and lying on it an integral part of the metal layer 84 so that there is shown in figs film, which areas 85 is partially removed metal layer 84.

1. Method for the production of partially metallizovannoj embossed, screen or luminary is her film, characterized in that create digital array (332) data that defines a graphical configuration partial metallization, wherein the digital array (332) calculate the toolpath and control data (333) to control the instrument, and the instrument (38) and a single - or multilayer film frame (30, 41, 60, 80) according to the path of movement of the tool move relative to each other, and the tool (38)is controlled according to the control data, provides partial discrete metal layer demeterova(16, 31, 44, 63, 84) through applying a rinse-off mask (83) for partial masking of single or multilayer film frame (80), the mask (83) is applied by spraying (91), one - or multilayer film frame (80) is then dried, supply metal layer (84), and a metal layer (84) by the method of leaching in the field of rinse-off mask (83) partially removed (94).

2. The method according to claim 1, characterized in that the rinse-off mask (83) is applied to exact size.

3. The method according to claim 1, characterized in that the metal layer(16, 31, 44, 63, 84) has a thickness less than 1 micron.

4. The method according to claim 1, characterized in that the metal layer(16, 31, 44, 63, 84) put across a flat surface by means of, in particular, gaseous deposition.

5. The method according to claim 1, characterized in that the meta is symbolic layer is applied partially.

6. The method according to claim 1, characterized in that the metal layer is a film made was highly reflective material.

7. The method according to claim 1, characterized in that the tool includes a piezoelectric element, or the element of evaporation, which, when applying the voltage pulse generates a pressure pulse in the filled material rinse-off mask chamber and causes the release of material rinse-off mask in the form of droplets through a nozzle, connected with the said chamber.

8. The method according to claim 1, characterized in that the rinse-off mask is applied in the form of droplets on the metal layer.

9. The method according to claim 1, characterized in that the rinse-off mask based on the polymer.

10. The method according to claim 1, characterized in that the rinse-off mask contains methylcellulose, carboxymethylcellulose, sodium salt of polyacrylic acid, polyvinyl-pyrrolidone or polisher.

11. The method according to claim 1, characterized in that the hardening of rinse-off mask carry out drying.

12. The method according to claim 1, characterized in that the scrubbing process position is removed by washing rinse-off mask and lying on it an integral part of the metal layer.

13. Partially metallized embossed or laminating foil, characterized in that it is produced according to the method according to claim 1.



 

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2 cl, 1 dwg

FIELD: polygraphic products, in particular, methods for its manufacture, possible use for manufacturing various types of securities.

SUBSTANCE: falsification-protected information carrier has at least one section imprinted using metallographic printing method, which consists of profiled lines which constitute an image. The imprinted section is made of profiled lines, colored along whole length, alternating with profiled lines, having colored and non-colored profiled sections along their length.

EFFECT: ensured production of falsification-protected information carrier with an image, which is used for visual or machine-readable control of authenticity.

4 cl, 4 dwg

FIELD: polygraphy, method for manufacturing polygraphic product which requires identification and confirmation of authenticity, for example, during manufacture of securities and valuable documents.

SUBSTANCE: method for determining authenticity of polygraphic product on basis of concealed information in printed image includes marking, encoding of input image using a program in computer system, decoding of printed image. Marking and encoding of input image are performed by changing optical density of internal areas of input image and following reflection of that change through printing elements of printing form in printed images in accordance to resolution of printing process. Alteration of optical density of internal areas of input image is performed according to given program with placement of changed areas across whole internal field of input image using doubled marks and encoded information on various internal sections of input image. During the check, reading of encoded information from printed image is performed, information is decoded and authenticity of polygraphic product is determined.

EFFECT: increased degree of protection of polygraphic product from forgery due to creation of concealed information, reproduction of which is difficult.

FIELD: technological processes.

SUBSTANCE: digital array of data is created, which defines graphical configuration of partial plating, at that, using digital array, trajectory of tool motion is calculated, as well as control data for tool control, at that tool and single- or multi-layer film carcass are moved in relation to each other in accordance with tool motion trajectory. Tool that is controlled according to control data provides partial discrete de-metalation of metal layer by means of application of wipe-off mask for partial masking of single- or multi-layer film carcass. Foresaid mask is applied by spraying. Single- or multi-layer film carcass is further dried, provided with metal layer, and metal layer is partially removed by flushing method in area of wipe-off mask.

EFFECT: efficiency from production point of view, possibility to apply coating on different surfaces and exclusion of thermal or mechanical effect onto surface.

13 cl, 16 dwg

FIELD: information medium sealed up by the method of metallographic printing, method for its manufacture, as well as a printing plate suitable for the purpose and the method for its manufacture.

SUBSTANCE: the information medium, first of all a bank note, securities or a similar document, which has at least one sealed up section (13) and at least one separate section (14) practically completely encircled by this section. The mentioned section (13) and the separate section (14) are sealed up by the metallographic method, and both sections are sealed up by paint coats of a different thickness and differ from one another.

EFFECT: provided a high degree of protection against forgery of the information medium.

21 cl, 11 dwg

FIELD: important documents with protective attributes, combination of matters with two automatically controlled properties for protecting important documents against counterfeit, methods for making such documents and methods for testing authenticity of charred matters and ash.

SUBSTANCE: important document, mainly bank note or person certificate is characterized by use at least of two luminophors whose luminescent properties may be automatically and individually monitored. First luminophore irreversibly losses its luminescent properties at first temperature. Second luminophore irreversibly losses its luminescent properties at second temperature. First and (or) second temperature exceeds natural temperature of burning important document. It allows to identify document according to itself and also according to its ash and prevents possibility of illegal regeneration of materials designed for protecting against counterfeit in order to make duplicates of documents.

EFFECT: enhanced reliability of identifying important documents.

29 cl

FIELD: manufacture of securities.

SUBSTANCE: metallographic printing form has printing members disposed on working surface and made in the form of deepened strokes having cross section profile of asymmetric shape with various angles of inclination of side faces.

EFFECT: increased extent of protection of securities from counterfeit.

17 cl, 4 dwg

FIELD: manufacture of securities.

SUBSTANCE: method involves providing pattern comprising combination of ink layer protrusions and slots therebetween, with width of ink layer protrusions making at least 0.5 mm.

EFFECT: increased extent of protection of securities from counterfeit.

17 cl, 4 dwg

FIELD: manufacture of securities.

SUBSTANCE: method involves providing protrusions of equal width at their base portion and of various cross section at apexes within the range of length of each protrusion.

EFFECT: increased extent of protection of securities from counterfeit.

17 cl, 4 dwg

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