New marking and method of its implementation

FIELD: textile, paper.

SUBSTANCE: base is subjected to pressure by placing it in contact with a stamping die. The stamp has a micro-proceeded site designed to create the diffraction pattern on this basis. The base comprises a printed paper or cardboard sheet varnished on the site of contact of the stamping die with the base. The stamp has also a plain section to create on this basis, except the diffraction pattern, a site with high degree of gloss.

EFFECT: invention enables to create a simple and economic mode of applying a visual label on the base.

24 cl, 13 dwg

 

The present invention relates to the marking of products. In particular, the present invention relates to a visually detectable markings on paper and cardboard sheets and methods of their application.

The level of technology

To indicate the authenticity of products or indications of their origin products usually provide a protective marking is done usually on their packaging. The marking may be visible to the naked eye or may require special means for its detection.

Example

the surface of the paper. To preserve the integrity of the wrap products and packaging are equipped with special signs and labels. Order the complication of counterfeiting banknotes is frequently applied holographic patterns or do them with protective holographic fibers and other similar signs. Such protective marking is often built into the packaging, for example, packaging boxes media with computer programs, electronic devices and jewelry.

Recently, increased emphasis on protective markings containing diffractive or holographic patterns. Usually holograms make a very big impression, and to reproduce them is difficult because it requires special equipment.

Traditionally marking of this type was applied to the packaging in the de private labels. Accordingly holograms were produced by means of hot stamping on individual films or labels with plastic base, is applied in the form of a layer or affixed to the packaging.

Recently, however, the level of protection provided by holographic labels, decreased significantly due to the large number of counterfeit products and holographic labels, produced in Asia.

For added difficulty of falsification labelling and packaging has been proposed a method of applying holograms directly on the surface of the packaging material. The essence of such methods is that the holographic patterns are embossed on special holographic receiving layer on the surface of the material with the use of rollers for embossing. However, when stamping items fibrous issues such as gluing stamp for embossing the surface of the product; the clogging of the creaser; low optical reflection; the high cost of equipment for stamping and covering materials; rigid requirements stamping, such as temperature and pressure stamping; fading holographic image due to the smoothing of the holographic layer; a large number of operations for the pre-treatment material cotinine and low productivity of production lines. In addition, before using special coatings, for example, in the manufacture of packaging of food or medical supplies must obtain permission of the competent authorities, such as the control food and drugs Food and Drug Administration (FDA) in the United States or the Federal Institute for risk assessment (Bundesinstitut für Risikobewertung - BFR) in Germany. These problems, often interrelated, since the solution of one of them leads to the appearance of new ones.

Was developed a number of ways in which attempts were made to find a solution to the above problems. The following briefly describes the known technical solutions related to the application of the embossed holographic labels.

In the publication WO 03/002330 describes a method of making holograms on a paper or a plastic film, coating which contains particles of polymeric pigment to improve their suitability surface for printing, or embossing. Embossing is applied to the film before printing.

In the application US 2004/0218238 disclosed a method of creating a holographic image on the printed surface by embossing. To do this, roll or sheet coated with a printed cover with a transparent holographic coating. It is proposed to use the device for embossing using the heated printing plate in the ideal roller for hologram on the rolled material. After embossing roller, the base material is cut with a special die-cutting press for further use. For stamping of flat material is proposed to use a special machine. However, such machines are not disclosed.

In the patent US 5,164,227 described by way of decorative finishes embossed paper or plastic sheet. On the basis of extrusion method or coating is applied thermoplastic material. Before stamping the coating is heated to soften and ensure the reproducibility of the sheet material of the pattern device for stamping. In equipment for stamping, described in the patent, in the General case contains roller for embossing, drying roller and, if necessary, pin cushion.

In the application US 2003/0227099 discovered another way to create a rainbow and/or holographic image on thermoplastic fibrous sheet or polymeric film. Here, the diffraction grating is created by using a polymer film as plates for stamping. Be embossed sheet or be embossed film prior to embossing/ heat treatment.

In the application US 2004/02077892 proposes a method of performing the second hologram on the foil for hot stamping, adhesive tape for stamping or paper coated with heat seal lacquer and containing the first hologram. Holographic ed is the lia can be used as a label to a different product. To improve visibility of the hologram surface is proposed to metalize.

In the application US 2004/0247829 encouraged to apply embossed holographic image on the pigment coating layer. Coating layer is preferred because of its susceptibility to stamping and ability to bind printing ink.

In the patent US 6,749,925 disclosed a method of manufacturing a macroscopic lens-shaped structures on a polymer substrate. Lenticular patterns allow to obtain different images of the same object depending on the angle of view.

Known methods of applying diffraction protective marking and decorative place high demands on the surface of the embossing or to the stamping process. Still have not been proposed effective ways of marking on the packaging of high-quality goods, as well as on the packaging of cheap consumer goods, consumer goods or food. The cost of manufacture of the marking should be relatively low relative to the cost of the product and its packaging. In addition, when carrying out the known methods of stamping requires additional processing embossed surfaces to obtain a visual and/or mechanically stable images.

Description of the invention

Task Nast is asego invention is to provide a simpler, economical method of applying a visual marking on the canvas.

In particular, the present invention is to develop a new method of applying on the basis of a visually identifiable pattern.

Another object of the invention is the creation of a paper or cardboard sheet containing a visually identifiable pattern.

These and other problems are solved by using the present invention allows to provide an advantage over known products and methods.

The basic idea of the invention consists in the application of visually identifiable pattern on a plate, painted in flat stamping. In particular, the invention relates to applied to printed sheets of diffraction patterns, which contains a layer of lacquer applied on these sheets.

It was found that conventional varnishes, widely used in paper and cardboard industry, can be subjected to embossing with obtaining a sufficiently high resolution and high quality needed to create diffraction effects at the wavelengths of visible light. Typically, these varnishes are used to improve the mechanical, chemical, or physical properties, such as wear resistance and moisture resistance or give the paper or cardboard gloss. In addition, it was found that by stamping lacquered surfaces can get the ü new glossy labeling. It was also found that, using the method of a flat stamping, you can get marks even without preheating of the sheet or layer of varnish. In particular, the diffraction patterns created on the layer of varnish deposited on the print basis, give rise to a special decorative effect.

More specifically, the proposed method is disclosed in the characterizing part of paragraph 1 of the claims.

The offered product is essentially disclosed in the characterizing part of paragraph 16 of the claims.

The present invention allows to obtain many benefits. The proposed method is applicable to conventional foundations, widely used in paper industry and is well known, such as packing cartons. Since embossing is applied to the layer of varnish, there is no need for special coatings and pigments, which can be costly or which may adversely affect the properties of the sheet material.

The invention can be implemented using varnishes commonly used, for example, as a finishing film packaging. The preferred characteristics of such varnishes are, for example, gloss, durability, brightness and protection products, as well as that they are known to consumers and approved by the authorities. In addition, the coating is very conominium method of coating. Using this method, the printed sheet can be applied legkoperevarivaemye and visible patterns without expensive metallization surface. As is well known, painted surfaces exhibit good resistance to scratching, abrasion and moisture and even successfully resist these factors.

Embossed sheets may be used, for example, in the packaging industry to perform on the product protective marking, guaranteeing the authenticity of the product or improve the appearance of the packaging, such as consumer goods, cigarettes, digital media, pharmaceuticals, cosmetics, consumer electronics, consumer goods, and food.

The proposed method of surface treatment in which a printed image applied to the coating, provides a number of advantages. For example, the appearance of the packaging forms essentially a printed image placed on it. Methods of coating the printed surfaces are widely known. By stamping products, already varnished, you can avoid the above problems, namely, to lower the level requirements for holographic coating or to avoid having to perform a separate step stamping before applying the printed image on the basis of relief. The fact that the safety marking to be applied to the surface during the last or the penultimate stage in the formation of packaging from packaging materials, before or even during cutting, is extremely advantageous from the point of view of the formation of packaging from packaging materials, packaging or, for example, the owner of the trademark. The application of the printed image on embossing with high resolution, almost inevitably leads to deterioration of decorative properties. Placing an embossed pattern in a geometric ratio with the elements of the printed image can further improve the appearance of the product.

In accordance with one embodiment of the invention is a flat stamping is performed on the same technological stage, which is the cutting of the sheet. Production line, especially the die-cutting press can be relatively easily adapted to perform the aforementioned functions. Therefore, this variant of the invention can be realized with low cost only a small modification of the existing equipment used for the formation of packaging. In comparison with known methods embossing according to the present invention requires fewer manufacturing operations, thus avoiding possible inconsistencies in the manufacturing process.

In accordance with one embodiment of the invention the plate for stamping, i.e. W is the amp for stamping, contains both smooth plot, and the diffraction pattern. When pressing the stamp to the layer of varnish diffraction pattern is copied to the selected area of the sheet, and smooth the area increases the gloss of other portions of the sheet. This leads to the emergence of a fundamentally new visual effect, which improves the appearance of the embossed product and complicates its fake. When placing micropore in the middle of the smooth area of the obtained diffraction pattern is very bright. Such means can be obtained markings, unique in appearance in comparison with known labels.

In accordance with another embodiment of the invention for separating stamp for stamping from sheet after contact of the stamp sheet is used with air separator.

When implementing embodiments of the invention it is possible to solve a number of problems associated with the use of cylinder presses for stamping, drawing on which should be repeated at intervals determined by the circumference of the cylindrical roller. In addition, the manufacture of rollers for embossing costly than the production of stamps for stamping, and if necessary, change the embossment is necessary to replace the entire roller. Therefore, their use is not suitable in cases where the embossment or the size of the embossed sheet etc who have to frequently change. This often occurs, for example, in packaging production, especially in the manufacture of several products, the packaging of which may have different sizes, and use the same packaging lines for several products.

By combining properly the above-mentioned embodiments of the invention, it is possible to get way

- provides protection for the product against forgery,

- can be applied using conventional packaging materials

- reduces the number of technological operations when performing the packaging protects the product against forgery,

- gives the product a unique appearance and

- applied on high and inefficient production lines, as well as in small workshops.

Additional advantages of the invention are listed below in the detailed description of embodiments of the invention.

In this document, the invention and its variants disclosed mainly from the point of view of manufacture of the packaging material, the formation of packaging and packaging products. However, it is obvious that the invention may find many other applications, for example, in the production of magazines, postcards, envelopes, business cards, phone cards, brochures, leaflets, official documents, certificates and diplomas. In principle, the IPE, the proposed method is applicable to all paper and cardboard items, lacquer, for possible subsequent stamping.

The term "cardboard" is used here in a broad sense and covers among other things the concept of "thin cardboard", "millboard" and even " fiberboard and laminated paperboard".

Brief description of drawings

Below is a detailed description of the invention with the accompanying drawings, on which:

figure 1 shows a section of a paper or paperboard base layer, the printed and embossed coat of varnish;

figure 2 shows a section of a paper or paperboard base layer, a top layer, the printed and embossed coat of varnish;

figure 3 shows a section of a paper or cardboard from the back surface, the base layer, a top coating, the printed and embossed coat of varnish;

figure 4 shows a section of a paper or cardboard from the back surface, the first base layer, the second base layer, a top layer, the printed and embossed coat of varnish;

figure 5 shows a section of a paper or paperboard base layer, opaque ink, the printed and embossed layer of varnish with a high gloss level;

6 shows a section of a paper or paperboard base layer, a top layer, the printed and embossed diffraction layer of varnish with a high gloss level;

IG shows the axonometric projection of the creaser with a smooth plot and plot subjected to the microprocessing;

Fig shows the axonometric projection of the creaser, with only the area subjected to the microprocessing;

Fig.9 shows the axonometric projection of the creaser having only smooth area;

figure 10 shows the axonometric projection of the creaser, combined with the smooth section of the site and, subject to the microprocessing;

11 is a photograph of the diffraction stamping on the sheet lacquered cardboard;

Fig is a photograph of the diffraction stamping and surrounding area with a high degree of gloss on the lacquered sheet of cardboard, and

Fig shows a section of a paper or paperboard base layer, the printed and embossed layer of varnish with a beveled profile.

Detailed description of the invention

As indicated above, the present invention allows to obtain a new type of sheet or roll of fibrous material, usually paper or cardboard sheet, comprising: a base layer having two opposite surfaces, and at least one layer of material deposited on at least part of one of these surfaces and containing a layer of varnish with a visually identifiable pattern.

In one embodiment of the invention visually identifiable pattern includes a diffraction pattern. This pattern Oba is but contains a large amount of mechanical deformation, when the random reflection of light waves, in particular, a length within the range of visible light cause the appearance of the diffraction pattern. This pattern may look different depending on the angle of observation relative to the available light sources. The pattern is formed by the microrelief, i.e. grooves extending from the surface of the lacquer deep into its layers, and/or elevations, protruding from the surface of the layer of varnish over the level of this surface. Deepening and elevation may also have a variable depth, width and height respectively. In one embodiment of the invention, the diffraction pattern contains holographically exposed image (hologram), which creates a surround effect.

In another embodiment, a visually identifiable pattern contains a smooth plot with a high degree of gloss. This can be achieved by using a smooth or partially smooth stamp for stamping.

Unexpectedly it was found that the ordinary gloss varnishes used, for example, packages may be magnified by clicking on the layer of varnish stamp for stamping, the surface of which is flat and smooth. Thus, this method allows to increase the degree of gloss lacquered surfaces locally by pressing them flat stamp.

In one embodiment of the invention visually identifiable pattern contains fraktsionnyi pattern and a plot with a high degree of gloss. In this embodiment, the creaser except microbranding plot has a smooth plot. Alternatively, you can use two or more stamps for stamping with a smooth and microabrasions surfaces.

Flat embossing is carried out using a device for stamping, containing at least one stamp for stamping. The working surface of the stamp may be, for example, a metal with a negative image of the desired embossing received by the microprocessing.

The base contains a paper or cardboard sheet, which may be of any shape, for example rectangular sheet of writing or printing, flat blank for packaging or even in the form of a folded or partially folded packaging. The sheet can have any dimensions. Therefore, the invention can be used range from small labels to marking transport boxes, which put large items. The base may also contain a special item, such as title box for the CD-ROM. Simple in manufacturing and impeding counterfeiting, especially in mass production, the new labelling disclosed in this document, provides effective protection against piracy, or at least simplifies the disclosure of illegal activities.

The sheet may also with whom to hold many layers of paper, paperboard, coatings, printing images and varnishes or any combination of them. It can also include large-scale embossed image, for example, commonly used on the wrappers of chocolate or packaging of cosmetic products.

In addition, prior to coating the sheet can be decorated with various foil, such as aluminum or polymer. An example of a typical basis is coated cardboard with printed image and the layer of varnish at least part of a sheet of canvas.

The above embodiments of the invention illustrated in the attached drawings.

Figure 1-6 shows examples of the proposed embossed sheets in an arbitrary scale. In these drawings, the base layer 10, 20, 30, 40, 50 and 60 paper or cardboard can be made of cellulose, allylestrenol or wood pulp, recycled fiber, or mixtures of these materials. Typical pieces of cardboard are, for example, thick cardboard, such as folding boxes, bookbinding boards, solid bleached and unbleached cardboard and cardboard for packaging liquids and refills containerboard.

In addition, the potential group of the basics of using this method include the high-quality lacquered paper used, for example, covers of magazines and brochures.

Mass bases can vary in a wide band is E. Basically, the method can be applied to thin paper, weighing 30-80 g/m2ordinary paper in the range of 80-120 g/m2high quality coated paper in the range of 120-300 g/m2and cartoons usually have a lot 120-500 g/m2or even more, in particular, 200-300 g/m2.The product of each class, you can easily find an appropriate scope. For example, the basics of cardboard suitable for external coating of packaging containers, but the markings can also be applied to the inner layers of packaging, for example, cushioning paper packaging food products, such as boxes of chocolates. The mark on these layers, performs primarily a decorative function and creates visual appeal, giving, thus, the product added value and uniqueness.

The basis of at least partially covered with a varnish 12, 22, 32, 42, 52 and 62, which may be in hard-, medium - or slabomineralizovannoj oil-based, water-based emulsion or synthetic. The preferred lacquer on a polymer basis. Suitable materials for varnish are, for example, polystyrene, polypropylene, polyacrylate, polyamide, polyvinyl butyral, polyvinyl alcohol, polyvinyl chloride resin and an ester of cellulose. The lacquer may also be a derivative of cellulose, such as complex e is Il cellulose, such as cellulose acetate or nitrocellulose, or a simple ester of cellulose, such as methylcellulose or benzyltoluene. It can be mixed with modifying additives, type plasticizers, resins and waxes. The lacquer may be made in the form of a dispersion in water or solvent and/or may be dried or overiden, using ultraviolet radiation. Cured or dried varnish can have a matte surface, either small or high gloss. This method is suitable for colorless varnishes and bases painted with layers of varnish.

Lacquer can be applied at the stage of manufacturing base, either by offset or screen printing method. Spray at the production stage is particularly suitable for large is not subjected to printing basics, and offset method can be used for varnishes, applied to the printed image, for example, in the packaging container.

Lacquer can be applied over the entire area of the sheet, or, for example, the packages or envelopes, varnish cover only some parts of the product. Thus, some parts of the packaging can be based. Such areas include, for example, the side seams or fasteners, which may be applied an adhesive for bonding areas of the same sheet between a bonding to another worksheet or the other subject. Varnishing is usually the last step in the process of applying the printed image on the packaging container. In addition, to get a thicker layer of varnish can be used, for example, an offline coater machine. Methods of application of various types of varnishes and location of the side seams is widely known in the packaging industry.

Lots of lacquer 12, 22, 32, 42, 52 and 62 on the areas covered with varnish, may be, for example, 0.1 to 15 g/m2in some cases 2-5 g/m2and usually about 3.5 g/m2. Good visual results are achieved with tisnenie, the depth of which is approximately 0.2 μm (figure 1 marked with the letter h), in this case, a sufficient number of coats of varnish is approximately 0.1 g/m2for varnishes on the basis of polystyrene. Using thicker paint layers 12, 22, 32, 42, 52 and 62 may affect the appearance of the marks, as it moves farther away from the surface of the material of the base material, and therefore, the printed image. Of course, in this case, you can use stamps for stamping with a deeper engraving.

Varnishes are typically used to protect paper and cardboard, especially their surface, and increase the degree of gloss. Especially varnishes are used to protect the printed image 14, 24, 34, 44, 54 and 64 on paper or cardboard. In one Varian is E. the invention of the printing image printed on the canvas before varnishing and embossing. In this case, the appearance of the diffraction pattern produces a deep impression, it seems that it is located directly over Foundation. On printable surfaces, you can get a variety of labeling, the appearance of which depends on the color of the basics. Within the scope of the invention as the material for the top cover in addition to clear varnishes can be used and opaque, or partially opaque varnishes.

Paper or cardboard can also be layered. Additional coating layers 26, 36, 38, 46, 48, 56 and 66, which are essentially known, can be printed on the front or the back side of the paper or paperboard, before or after printing.

According to one variant of the invention the embossing contains the diffraction pattern. An example of such embossing is shown figure 11. The diffraction pattern contains microrelief structures formed essentially by the grooves 17 and the projections 15, i.e. the recesses and elevations, depth or height h which, respectively, for example, 0.05 to 5 μm, typically 0.1-1 μm. When applying extremely thin layer of varnish depth of the structure may be even more than 5 μm, but typically less than 15 microns. This structure can be used to achieve a particular visual effect. The pattern can also contain patterns 35 and 37, which profile has a variable depth or height and the medium is where you can get more visually different embossing. Patterns can be of any shape. They may, for example, consist of numbers or text, formed by an arbitrary combination of stripes, grids, dots, dot structures, curves, circles, and lines. Received relief items do not necessarily have to be as sharp as on the attached drawings, they may have a rounded or other irregular shape, for example, sinusoidal patterns or irregular shapes, which create a matte effect.

According to another variant of the invention, the diffraction pattern forms a hologram.

According to one variant of the invention, the diffraction pattern gives a completely different video depending on the viewing angle. For example, if marked to look under the left corner, it can be seen that the logo of the manufacturer, under the right angle - the name of the manufacturer, and if you look at the bottom, logo products. Thus, the embossed pattern may contain a large number of visually identifiable levels of information, independent from each other (for example, the traditional three-dimensional hologram containing information about the same object from different angles of view).

The wavelength of visible light is approximately 400-700 nm. Diffraction of light due to its interference observed at papadaki the light in the object, the size of which is comparable with the order of the wavelength. The various components of a wavefront having a different wavelength, cause interference, shown from different angles, the result of which looks like a rainbow and depends on the spectrum of the light and angles. This phenomenon is used holograms to preserve the three-dimensional visual information in the diffraction pattern. The basic law of diffraction, due to the lattice surface is described by the Bragg law:

where D is the step to which are the slits in the grating,

θ is the angle between the propagating wave and the surface

m is the order of diffraction, and

λ is the wavelength of light.

Step D, which is placed adjacent the notches 17, 37, 67 and the protrusions 15, 35, 65, i.e. the resolution of the embossed pattern has in the preferred embodiment of the invention is approximately the same order as the wavelength of the radiation in the visible region of the spectrum. Due to the fact that the coefficient m in the Bragg law is an integer, diffraction also occurs on surfaces with a spacing greater than the specified. The lowest value of step D is usually determined by the physical properties of the lacquer.

For example, the lacquer on the basis of polystyrene was embossed with linear gratings with periods D 0,4; 0,8; 1,6; 2,4; 3,2; 6,4 and 12.8 ám (t which is the distance d between the recess and the adjacent ledge was 0.2; 0,4; 0,8; 1,6; 3.2 and 6.4 µm, respectively). The photo illustrating this experiment, see figure 11. It was found that the lattice with periods of 1.6 and 2.4; 3.2 and 6.4 µm create the clear diffraction. Other grills were also visible in dim areas, but with a weak diffraction or even without it. The reproducibility of the finest diffraction gratings on the polystyrene was insufficient. Therefore, almost diffraction plot in the case of polystyrene is about 1-10 microns, at least about 1.6 to 6.4 µm, expressed in terms of the period D of the considered patterns. According to the Bragg law (equation 1), by adjusting the period of the diffraction grating, it is possible to adjust the period of the color spectrum of the diffracted from the diffraction grating (i.e. when any corners interferes certain color). However, you can also use patterns with a resolution beyond the range of diffraction or radiation in the visible spectrum, in order to diversify the embossed image. Although this review focuses primarily on conventional linear diffraction gratings, these principles apply to all types of microstructures, such as holograms. In addition, the above ranges of distances can be considered useful for embossing also varnishes, other than varnishes cos the ve polystyrene.

According to one variant of the invention, the step which placed grooves in the diffraction pattern, exceeds 0.1 μm, for example, 0.5 to 15 μm, in particular 0.5 to 8 μm, typically about 0.5-5 microns.

7 to 10 are four different examples of stamps for stamping within the scope of the invention. According to one variant of the invention (cf. figure 5 and 9), the surface 90 of the plate, and therefore, stamping 59 is completely smooth. Smooth region serves to increase the degree of gloss varnish 52 in some areas of the sheet. The property of increasing the degree of gloss smooth plot was an unexpected result of the experiments with embossed conducted by the applicant. In this context, the term "smooth area" refers to the plot, which specifically was not subjected to etching. Smooth plot can be obtained, for example, polishing, polishing or coating. The formation of a smooth area could also be a by-product of the electrolytic process for the production of plates. In a preferred embodiment of the invention, the roughness of the smooth area is significantly less than the initial surface roughness of varnish, usually part of 1-10 μm (method PPS-10) according to ISO 8791-4.

In some embodiments of the invention (see Fig.6, 7 and 10) creaser has microgravimetry plot 72, 102, and a smooth section 70, 100, 104, the which was not subjected to the microprocessing. Under "mikroprovetrivanie" and "microbrasserie" refers to areas with mechanical deformations, with the minimum size in the range of from about 0.1 to 10 microns.

Gloss varnished surface 62 may be strengthened in the area 69 diffraction pattern 65, 67, to highlight the most attractive way. The photo illustrating this type of stamping shown in Fig, where the diffractive embossing surrounded by a rectangular area with a high degree of gloss. Nick on the borders of this region due to the large press used in the stamping in the experiment. However, a comparable increase of the degree of gloss is achieved when using a weaker stamping presses. Plot with a high degree of gloss, the surrounding pattern subjected to the microprocessing, may be, for example, at least 10%and may be as much as ten times the area subjected to the microprocessing.

Superior gloss can give a number of advantages. First, it makes the marking of non-repeatable, in contrast to the known diffraction markings. Secondly, it serves to protect, because it makes it difficult to counterfeit products. Thirdly, it creates new opportunities for designers labels, allowing you to make a more visually appealing product. Fourth, the perception of the fingertips area with high CTE is to prolong gloss differs from their perception of plots completely deprived of stamping.

As for Fig, according to one variant of the invention the plate for stamping, and accordingly, the layer of varnish that has been embossed with that record, have sloping ends, i.e. chamfer 139. In other words, instead of engravings and smooth areas described above, or in addition to them visually distinct pattern may have a local bevels. The angle of chamfer 139 relative to the plane of the plate (or surface layer of varnish) may be, for example, 0-90°, in particular 20 to 70°. The chamfer dimensions 139 may lie in the diffraction range or can be much larger than the diffraction patterns. Therefore, chamfer 139 can be used for diffraction or nidirectional reflection of light, although diffraction can always be present to a small extent. Chamfer 139 can be used, for example, to delineate the diffraction pattern, or create a visual effect that is dependent on the angle of view. In combination with the diffraction areas and/or areas with a high degree of gloss, beveled sections can be used to give additional unique protective properties or create additional decoration.

Below is a more detailed description of how to create visually identifiable patterns.

7 to 10 are examples of plastic is OK for stamping, i.e. stamps for stamping, suitable for carrying out the invention. Stamp or at least its working surface is preferably made or made of metal. The stamp is preferably such that the negative potential of the diffraction pattern can be made on it by the microprocessing by any known method. Such methods include, for example, mechanical engraving, laser engraving, lithographic methods and chemical etching. The pattern can be either be engraved or combined, depending on the selected type of embossing. Creaser can be attached to a device for stamping, including the necessary fixtures and automation to perform the stamping.

According to one variant of the invention the plate for embossing or at least its working surface is made of Nickel. To produce Nickel stamps is very simple, in addition, Nickel stamps are easily microprocessing and provide a high surface smoothness.

Stamps can be produced by mechanical means, however, to create visokogradnja surfaces, the surface layers of dies for stamping can be produced by physical or chemical deposition of the products of the earlier stages of the reaction of Nickel on an appropriate basis.

PR is measures such methods can serve as deposition with polyvinylpyrrolidone (PVP), chemical vapor deposition (chemical vapor deposition CVD) and atomic deposition layer (atomic layer deposition ALD) and their variants, reinforced by the use of plasma. Other materials for stamps include, for example, aluminum, silver, iron, copper and brass.

Plate for stamping may also contain a thick supporting layer, for example, of steel, and a thinner layer of the working surface made of Nickel or any other suitable metal. The surface layer is attached to the supporting layer corresponding detachable mounting means or adhesives. Contact areas and excavation of the working surface is preferably performed in advance on the metal layer. Alternatively, the working layer of the plate may contain ceramic, composite, or plastic layer, with a significantly higher hardness than the hardness of the used varnish. In addition, creaser may be diamond coated.

For playback on the basis of a negative pattern, placed on the stamp for stamping, the stamp should contact the varnished surface of the base. The corresponding pressure contact, i.e. the pressure of the embossing is, for example, 1-10000 MPa, in some cases, 5-3000 MPa, typically 5-500 MPa. The optimum pressure depends on the type of paper used or used cardboard, what about the features of their fibrous material, patterns, fillers, thickness and sealing properties. The optimum pressure depends on the type of varnish that is material for its manufacture, initial gloss, surface roughness, hardness, surface tension and energy, and elastic properties. In addition, the pressure depends on the material and the finished surface of the creaser, size, and resolution engraving placed on it. By adjusting the pressure of the embossing can also facilitate removing the creaser from the Foundation.

Changing the temperature of the stamp for stamping, it is possible to influence the quality of the reproduced image and stamping process. To the characteristic factors of the choice of temperature are mainly the above-mentioned properties of the lacquer and creaser. The temperature of the surface of the stamp can be 0-150°C, typically 50-150°C., in particular 50-85°C. Although the process can be operated without heating, i.e. at room temperature 15-25°C, it was found that at least for varnishes on the basis of polystyrene quality stamping and removing the stamp from the basics better at higher temperatures stamp 65-75°C. it is Also known that various varnishes behave differently depending on the temperature of the stamp. In particular, other experiments showed that when using plates for embossing pattern with high resolution is crucial abilities and ordinary varnishes best results are achieved at temperatures above 85°C, preferably 100°C., in the range up to 150°C and 200°C.

The contact time stamp for stamping with varnish also affects the quality of printing and may vary from a few milliseconds up to seconds and is usually 5-100 milliseconds.

In one embodiment of the invention, the embossing is performed on a hard and solid surface. This can prevent rupture of the sheet. However, in some cases, it may be necessary to apply embossing on flexible Thaler.

According to one variant of the invention stamp for stamping and embossed sheet are separated by pneumatic means. Separation may be effected, for example, pneumatic impact, direction of flow of air or any other gas between the die and the sheet, which are separated from each other due to exposure to air. Preferably the flow is directed to the sheet near the creaser to prevent bending of the sheet. You can also submit multiple threads on different sides of the sheet. Air separation in addition to separating the effects can also cause a cooling effect. This is applicable when hot stamp for stamping, the heat from which is passed to the paint in the stamping process. During a short pulse of air embossed pattern may be cool for 10-20°C, for example, depending on temperature and thickness of the layer of lacquer, equipment, and t is the train temperature and the magnitude of the impulse. When this varnish hardens and fades embossing caused by increased temperature decreases. Pneumatic tools can be part of the means for stamping, or used as a separate pneumovagina. In a preferred embodiment of the invention the control means for stamping and pneumatic means carried by one control unit. The separating means may also contain equipment that uses air separation combined with mechanical separation, or can be applied only mechanical separation.

In one embodiment of the invention the means for stamping and release agents combined with die-cutting tools, which contain the equipment necessary for cutting sheet form is received, useful, for example, for folding. Such devices are a key element of the model lines for the manufacture of packaging containers. Usually the die-cutting are printed packing lists, varnished, and at this stage you can also diffractive embossing. In addition to cutting the sheet into blanks, for example, folding boxes, die-cutting presses are also used for the manufacture of bend lines (hatching) on the workpiece. Press flat die-cut contains a large plate on which is fixed a set of lines. H is an intersection line of sharp, and Strakhovaniye line is rounded. At the stage of cutting a large plate press to the sheet in a horizontal plane. In such a die-cutting press stamp for stamping can also be attached to a large plate. The magnitude of the efforts developed by die-cutting lines, Strakhovaniye rulers and creaser in the direction of the framework can be adjusted by relative uplift of the rulers of the plate. Thus, the number of technological operations remains constant. Many of the existing die-cutting devices can be converted to combined Fiscalina-stamping device, so that costs can be very low. The performance of industrial equipment for stamping may be, for example, 500-10000 sheets per minute.

According to one variant of the invention, the embossing is carried out by means of a flat stamping press, for example, stamping press with hot foil stamping. However, for stamping foil is not required. Therefore, the press can be changed so that it better suited for stamping bases covered with a varnish. However, for stamping you can use many other devices that can generate a given force stamping.

Example

Lacquer W1639 firm DS Nordic, made on the basis of polystyrene dispersion was evenly nanesena coated paperboard Simcote (255 g/m 2and Nova X (345 g/m2one layer at the end of the work sheet offset printing machine. Coating weight in the dry state amounted to about 3.5 g/m2. Ready printed and varnished cardboard had a bright gloss.

After that the top layer of varnish cardboard was subjected to horizontal microprocessing ink press, hot stamping foil, used BOBST press type Autoplatine SP 1260-VM (the company). Bobst and the son" (J. Bobst & Fils S.A., Lausanne, Switzerland, 1978). Creaser was first combined with magnesium plate thickness of about 7.0 mm using exactly cut double-sided tape. Then this set of stamps was fastened to the frame of the press using a special coupling hooks.

Creaser contained letters formed using linear diffraction gratings with periods 0,80, 1,60, 2,40, 3,20, 6,40 and 12.8 µm. Profile height in all cases was 0.19±0.01 µm.

Working speed ranged from 1,000 to 2,600 sheets/hour, the temperature of the press was in the range from 18 to 75°C, and the force of pressure from 0.01 to 5 MN. In the process creaser was in direct contact with the layer of varnish on the top surface of the cardboard. During the technological process used in air separator, which prevents adhesion of the lacquer to the creaser due to the cooling surface is STI cardboard and create a buoyancy force.

The symbols obtained as a result of this experiment on a layer of varnish on the surface of the cardboard were visually detected. They seemed to be placed just above the images made by offset printing on cardboard, and reflect light of different wavelengths (color) depending on the angle and periods of linear diffraction gratings. In addition, the smooth part of the stamp for stamping, which has not passed the microprocessing, created the effect of glossy spots on the surface, covered with a varnish. Pictures of the experiment is shown in 11 and 12.

1. The way to create a visually identifiable pattern on the substrate, which is subjected to pressure by putting it into contact with the stamp for stamping with microabrasion the site intended for creation on this basis of the diffraction pattern, which contains printed paper or cardboard sheet, lacquered at the site of contact of the stamp for stamping with the base, characterized in that it uses the stamp for stamping having a smooth plot to create on this basis, in addition to the diffraction pattern of the site with a high degree of gloss.

2. The method according to claim 1, characterized in that, as specified basis use paper or cardboard sheet, lacquered on a polymer basis.

3. The method according to claim 1 or 2, characterized in that Thu is it used lacquer, selected from the group of polystyrene, polypropylene, polyacrylate, polyamide, polyvinyl butyral, polyvinyl alcohol, polyvinyl chloride, esters of cellulose, cellulose acetate, nitrocellulose and simple cellulose ether such as methylcellulose or benzyltoluene.

4. The method according to claim 1 or 2, characterized in that the weight of the nail varnish plot is 0.1-15 g/m2in particular 2-5 g/m2.

5. The method according to claim 1 or 2, characterized in that, as specified basis use coated paper or cardboard sheet.

6. The method according to claim 1 or 2, characterized in that the diffraction pattern contains a hologram.

7. The method according to claim 1 or 2, characterized in that microbrewery section contains the engraving depth of 0.05-5 μm, in particular 0.1 to 1 micron.

8. The method according to claim 1 or 2, characterized in that microabrasions the plot has micropore, separated from each other with a step of 0.1 to 15 μm, in particular 0.1 to 8 μm, typically about 0.1-5 microns.

9. The method according to claim 1 or 2, characterized in that it uses the stamp for stamping, the surface temperature is 0-150°C., in particular 50 to 80°C.

10. The method according to claim 1 or 2, characterized in that it uses the pressure of the embossing 1-10000 MPa, in particular 5-3000 MPa.

11. The method according to claim 1 or 2, characterized in that the roughness of the smooth area less than the surface area specified varnish.

12. With whom persons according to claim 1 or 2, characterized in that the die-cutting and embossing perform on the same technological stage.

13. The method according to claim 1 or 2, characterized in that the base and the stamp is subsequently divided by acting on the basis of pneumatic blow.

14. The method according to claim 1 or 2, characterized in that, as specified basis use paper or cardboard sheet, representing the packaging blank.

15. Paper or cardboard sheet, containing in combination:
the underlying printed layer having two opposite surfaces, and at least one layer of material located on at least part of one of the said surfaces and having a layer of varnish that has a visually identifiable diffraction pattern, wherein said visually identifiable diffraction pattern except the diffraction pattern contains a plot with a high degree of gloss.

16. Paper or cardboard sheet 15, characterized in that the lacquer has a polymer base.

17. Paper or cardboard sheet according to item 15 or 16, characterized in that the lacquer selected from the group of polystyrene, polypropylene, polyacrylate, polyamide, polyvinyl butyral, polyvinyl alcohol, polyvinyl chloride, esters of cellulose, cellulose acetate, nitrocellulose and simple cellulose ether such as methylcellulose or benzyltoluene.

18. The paper is th or cardboard sheet according to item 15 or 16, characterized in that the base layer contains at least one coated layer.

19. Paper or cardboard sheet according to item 15 or 16, characterized in that it is a packaging blank.

20. Paper or cardboard sheet according to item 15 or 16, characterized in that the diffraction pattern contains a hologram.

21. Paper or cardboard sheet according to item 15 or 16, characterized in that the diffraction pattern contains indentations, spaced from each other in increments of 0.1-15 μm, in particular 0.1 to 8 μm, typically about 0.1-5 microns.

22. Paper or cardboard sheet according to item 15 or 16, characterized in that the diffraction pattern contains a recess depth of 0.05-5 μm, in particular 0.1 to 1 micron.

23. Paper or cardboard sheet according to item 15 or 16, characterized in that the mass of the varnish layer is 0.1-15 g/m2in particular 2-5 g/m2.

24. Paper or cardboard sheet according to item 15 or 16, characterized in that the visually identifiable pattern contains embossing.



 

Same patents:

FIELD: textiles.

SUBSTANCE: present invention pertains to a layer with an image meant for use in absorbent fabrics. An image is made, for example, in the form of a text or picture. An image is formed with a number of dots. When the layer is in the first state, the dots have the first surface density, which form an identifiable and clear image. When the layer is in the second and then outspread state, the dots have a second surface density, which is below the first surface density in the first state. In this case the image goes into the second surface state essentially indecipherable or unclear to the observer at the given distance because of a lower surface density.

EFFECT: obtaining the effect of reduction in visibility of the image on the fabric.

9 cl, 10 dwg

FIELD: light industry; composition of decorative coats for wallpaper; manufacture of pearly ink for intaglio printing on wallpaper.

SUBSTANCE: composition of proposed printing ink for wallpaper contains 16-16.5 mass-% of pearly pigment; 12-12.5 mass-% of ethyl alcohol; 46-46.4 mass-% of binder - acrylic latex of butyl acrylate copolymer (19-21%) and methacrylic acid (10-12%) and water; copolymer acrylic latex is produced by method of radiation emulsion polymerization of butyl acrylate, vinyl acetate and methacrylic acid under action of ionizing radiation at dose rate of 0.05-0.1 g/s to absorbed doses of 1.5-2 kgr.

EFFECT: avoidance of lamination of ink; easily washable ink; enhanced heat resistance of ink.

1 tbl, 2 ex

FIELD: chemical industry; printing industry; other industries; methods of production of the composition of the paint including the optically changeable pigments.

SUBSTANCE: the invention may be used in production of the optically changeable pigments. The optically changeable pigment includes the stratified set composed of the different materials, in which, at least, one of the layers represents the reflecting layer and, at least, one of the other layers represents the dielectric layer. At least, one of the surfaces of the indicated layers is subjected to the chemical action. The indicated materials also include, at least, one of the layers, which represents the semitransparent metallic layer made out of chromium and also one or more metals and-or their inorganic compounds. At that the metal and-or its inorganic compound are subject to corrosion. The subjected to the chemical action surface of the reflecting and dielectric layer along the edge of the layering block of the edge structure of the pigment is coated with the passivating agent, which is selected from the group consisting of the organic esters and the fluorinated organic esters of the phosphoric acid, having the following structural formula: (Rf-CH2-CH2-O)xP(O)(OH)y, where Rf=F-(CF2-CF2)z, х=1 or 2, у=2 or 1, х+у=3, z=l-7. The composition of the printing paint includes the binding system, water and the optically changeable pigment. The invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

EFFECT: the invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

22 cl, 7 ex

FIELD: pulp-and-paper industry.

SUBSTANCE: paper/cardboard with protection means comprises paper base and cardboard base having one or more layers of cellulose fibers and surface-processed layer adjoining at least one side of paper/cardboard base, of which layers at least one layer is part of at least one local deviation defining distinctive sign on paper/cardboard. Local deviation comprises locally compressed material and locally surface-processed layer having thickness exceeding thickness of respective surface-processed layer disposed around and outside indicated layer. Method for producing of paper/cardboard with protection means is also described.

EFFECT: increased efficiency in producing of low-cost surface- processed cardboard and paper protected from counterfeit, provision for obtaining of desirable precise distinctive signs on paper or cardboard.

20 cl, 4 dwg, 3 ex

The invention relates to thermosensitive recording materials, in particular paper and taking into account the major area of application is the production of business and securities can be attributed to the means of their protection against forgery

FIELD: textiles, paper, hygiene.

SUBSTANCE: proposed method of manufacturing hygienic paper products involves stages, in which a continuous paper sheet is supplied and moving this continuous paper sheet in the direction of its longitudinal stretch. A recurrent decorative structure is applied on the sheet relative to the longitudinal stretch of the sheet as the first design using the first drum. A recurrent functional structure is applied on the sheet relative to the longitudinal stretch of the sheet as the second design using the second drum. Simultaneous speed control of the repeating surface of the continuous sheet and phasing between the first drum and the second drum is performed, in order to phase the first design and the second design one relative to the other to obtain one and the same recurring spatial interrelation with each other on the whole longitudinal stretch of the continuous sheet. In this case the lengthening of the sheet is controlled due to contact zones during supply at the inlet and contact zones during discharge at the outlet before and after the stage of application of the first design and/or the stage of application of the second design and relaxing of the sheet after it leaves the contact zone during unloading at the outlet.

EFFECT: improved outward appearance of the product.

20 cl, 6 dwg

Important document // 2324599

FIELD: textiles; paper.

SUBSTANCE: on the engraved surface of a printing form there are separate areas almost touching each other, with three different values of engraving depths. The printing form is used in metallographic printing of grey scale image, depicting a three dimensional object, by manipulating light and shade and/or plastic effects.

EFFECT: well distinguishable three dimensional image is obtained.

13 cl, 26 dwg, 10 ex

FIELD: printing technologies.

SUBSTANCE: steel printing form for deep printing contains on its surface at least one first section with printing structures, meant for producing an imprint by deep printing method, and at least one second section with structures intended for stamping, size of which is less than 100 micrometers. Parts of structures which are closest to the surface of printing form are positioned at a distance from 20 to 100 micrometers below level of printing form surface.

EFFECT: ensured stamping of securities and their simultaneous printing with usage of a single steel printing form for deep printing, and also high protection of securities from forgery is ensured.

9 cl, 15 dwg

FIELD: data carriers.

SUBSTANCE: data carrier 14 with forgery-protecting imprint 1 made by metallographic printing method consists of several contrasting structural elements 2,3,4,5,7,22, positioned with precise alignment to each other, while one portion of these structural elements 3,4,5,7 is made relief-type and can be sensed by touch, and other portion of structural element 2, 22 is made flat and undetectable by touch.

EFFECT: exceptionally high level of protection.

4 cl, 9 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: 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: data carriers.

SUBSTANCE: data carrier 14 with forgery-protecting imprint 1 made by metallographic printing method consists of several contrasting structural elements 2,3,4,5,7,22, positioned with precise alignment to each other, while one portion of these structural elements 3,4,5,7 is made relief-type and can be sensed by touch, and other portion of structural element 2, 22 is made flat and undetectable by touch.

EFFECT: exceptionally high level of protection.

4 cl, 9 dwg

FIELD: printing technologies.

SUBSTANCE: steel printing form for deep printing contains on its surface at least one first section with printing structures, meant for producing an imprint by deep printing method, and at least one second section with structures intended for stamping, size of which is less than 100 micrometers. Parts of structures which are closest to the surface of printing form are positioned at a distance from 20 to 100 micrometers below level of printing form surface.

EFFECT: ensured stamping of securities and their simultaneous printing with usage of a single steel printing form for deep printing, and also high protection of securities from forgery is ensured.

9 cl, 15 dwg

Important document // 2324599

FIELD: textiles; paper.

SUBSTANCE: on the engraved surface of a printing form there are separate areas almost touching each other, with three different values of engraving depths. The printing form is used in metallographic printing of grey scale image, depicting a three dimensional object, by manipulating light and shade and/or plastic effects.

EFFECT: well distinguishable three dimensional image is obtained.

13 cl, 26 dwg, 10 ex

FIELD: textiles, paper, hygiene.

SUBSTANCE: proposed method of manufacturing hygienic paper products involves stages, in which a continuous paper sheet is supplied and moving this continuous paper sheet in the direction of its longitudinal stretch. A recurrent decorative structure is applied on the sheet relative to the longitudinal stretch of the sheet as the first design using the first drum. A recurrent functional structure is applied on the sheet relative to the longitudinal stretch of the sheet as the second design using the second drum. Simultaneous speed control of the repeating surface of the continuous sheet and phasing between the first drum and the second drum is performed, in order to phase the first design and the second design one relative to the other to obtain one and the same recurring spatial interrelation with each other on the whole longitudinal stretch of the continuous sheet. In this case the lengthening of the sheet is controlled due to contact zones during supply at the inlet and contact zones during discharge at the outlet before and after the stage of application of the first design and/or the stage of application of the second design and relaxing of the sheet after it leaves the contact zone during unloading at the outlet.

EFFECT: improved outward appearance of the product.

20 cl, 6 dwg

FIELD: textile, paper.

SUBSTANCE: base is subjected to pressure by placing it in contact with a stamping die. The stamp has a micro-proceeded site designed to create the diffraction pattern on this basis. The base comprises a printed paper or cardboard sheet varnished on the site of contact of the stamping die with the base. The stamp has also a plain section to create on this basis, except the diffraction pattern, a site with high degree of gloss.

EFFECT: invention enables to create a simple and economic mode of applying a visual label on the base.

24 cl, 13 dwg

FIELD: packaging industry.

SUBSTANCE: method of manufacturing a packaging material is proposed, according to which the web of paper or cardboard is provided with the repeating pattern made with printing ink, which is printed directly on the surface of the web of paper or cardboard, after which the web is rolled onto the storage bobbin prior to additional processing. The web of paper or cardboard, prior to winding onto the storage bobbin is machined, whereby the selected areas of the rough surface of the web of paper or cardboard are flattened in the manner and to the extent that the printed pattern made with printing ink in all of these flattened areas is flush with the remaining areas of the surface of the web of paper or cardboard or below this level. At that the web provided with printing ink is provided with the repeating pattern of fold lines through which bending is facilitated.

EFFECT: reduced costs.

10 cl, 4 dwg

FIELD: pulp-and-paper industry.

SUBSTANCE: paper/cardboard with protection means comprises paper base and cardboard base having one or more layers of cellulose fibers and surface-processed layer adjoining at least one side of paper/cardboard base, of which layers at least one layer is part of at least one local deviation defining distinctive sign on paper/cardboard. Local deviation comprises locally compressed material and locally surface-processed layer having thickness exceeding thickness of respective surface-processed layer disposed around and outside indicated layer. Method for producing of paper/cardboard with protection means is also described.

EFFECT: increased efficiency in producing of low-cost surface- processed cardboard and paper protected from counterfeit, provision for obtaining of desirable precise distinctive signs on paper or cardboard.

20 cl, 4 dwg, 3 ex

FIELD: chemical industry; printing industry; other industries; methods of production of the composition of the paint including the optically changeable pigments.

SUBSTANCE: the invention may be used in production of the optically changeable pigments. The optically changeable pigment includes the stratified set composed of the different materials, in which, at least, one of the layers represents the reflecting layer and, at least, one of the other layers represents the dielectric layer. At least, one of the surfaces of the indicated layers is subjected to the chemical action. The indicated materials also include, at least, one of the layers, which represents the semitransparent metallic layer made out of chromium and also one or more metals and-or their inorganic compounds. At that the metal and-or its inorganic compound are subject to corrosion. The subjected to the chemical action surface of the reflecting and dielectric layer along the edge of the layering block of the edge structure of the pigment is coated with the passivating agent, which is selected from the group consisting of the organic esters and the fluorinated organic esters of the phosphoric acid, having the following structural formula: (Rf-CH2-CH2-O)xP(O)(OH)y, where Rf=F-(CF2-CF2)z, х=1 or 2, у=2 or 1, х+у=3, z=l-7. The composition of the printing paint includes the binding system, water and the optically changeable pigment. The invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

EFFECT: the invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

22 cl, 7 ex

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