Printing form for metallographic printing and valuable document manufactured using said form

FIELD: metallographic printing.

SUBSTANCE: form is meant for producing printed image or imprint and has at lest one engraved portion on surface with one or more structural elements. Edge portion of structural elements is engraved for greater depth compared to depth, at which their inner portion is engraved, edge portion and inner portions are directly adjacent, directly merge into one another and inner portion is made in form of area, positioned below surface of printed form.

EFFECT: higher efficiency, lower costs.

4 cl, 4 dwg

 

The present invention relates to recording media made by the method of metallographic printing the printed image or the printing method of metallographic printing, and to print forms, intended for carrying out the method of metallographic printing, and to a method of manufacturing such printed forms.

A characteristic feature of gravure printing is that the print, i.e. ensuring the transfer of ink to the substrate, the areas of the printing form is made in the form of recesses in its surface. These recesses receive using the appropriate engraving tool or etching. Before actual printing process on the engraved printing plate is applied printing ink, the excess of which is removed from the surface of the printing form by a squeegee or wiping roller, resulting printing ink remains only in the recesses. Then to print form pressed basis, usually paper, which is then separated from this printing plate, and the paint sticks to the surface of the substrate, forming its imprint, i.e. the printed image. When using translucent printing inks optical density of the color tone adjust change the thickness of the applied layer of paint. Under high pressure the base material is additionally subjected to embossing, prioritarily structure, which comes out from the back side of the canvas.

Methods gravure printing is divided into autodeploy gravure printing and metallographic printing. Printed forms for autodeploy gravure printing is made, for example, electron beam, laser beam or a chisel. A characteristic feature autodeploy gravure printing is that to convey various shades of gray and color tone in the printed image due to the orderly layout in printed form printing elements in the form of cells with different density, size and/or depth.

Unlike autodeploy gravure printing with metallographic printing use printing plates, in which to obtain the seal, respectively, of the printed image perform depressions in the form of lines. Mechanical production of printed forms for metallographic printing because of the generally conical narrowing of engraving tools with increasing depth of etching is increased line width. In addition, with increasing depth of etching is increased and the amount of viraemia engraved paint line, and thus the opacity of the printed line. In the manufacture of printing forms for metallographic printing etching its not printing the parts covered with a chemically inert lacquer. In the subsequent etching on not covered econvergence shape formed by etching, depth form which lines depends primarily on the etching duration and width.

Metallographic printing, primarily with steel printing plates, called in this case, engravings, allows you to get a distinctive, easily recognized even by the layman the impression that it is impossible to get in other common methods of printing. This is due to the fact that when a sufficient depth of the recesses is made on the printing form engraving imprint on sealed by the method of metallographic printing media acquires as a result of its stamping and applying to a layer of paint relief structure identifiable by touch. For this reason, the method of metallographic printing with steel engravings is the preferred method of printing first of all such media as are protected against forgery and valuable documents, for example banknotes, stocks, bonds, certificates, cheques, counterfeit labels and other similar documents, which must meet the highest requirements regarding their protection from forgery.

From WO 97/48555 known way using a machine to produce printing plates for metallographic printing certain parties. To this end, in the computer, you enter the location of the dashed lines on the figure, as the original is scarlet and just set the area of each individual line. After this engraving tool, for example a rotating chisel or laser beam, a first engraved outer contour of these surfaces to obtain their exact shape or outline. Then edged the surface area the same or a different engraving tool is removed the material results in the entire line, just engraved in accordance with dashed original. However, depending on the type of engraving tool and control its movement bottom surface at the site where the removed material is given a certain roughness or roughness (rough figure), ensures retention of the printed ink.

To give the impression produced by the method of metallographic printing, expressed relief patterns, distinct to the touch, the paint in the manufacture of storage media known from the prior art methods need to be extremely thick. It is obvious, however, that the thicker the layer applied to the printed base paint, the higher the consumption of printing ink, which in turn leads to an increase in production costs. In addition, when the sealing base of traditional technology to increase the quantity plotted on the printed forms of the printing ink, to cover it all engraved areas, which are responsible for the availability of get the impression discernible to the touch structures. This significantly increases the number of excessively applied to the printing plate paint, which must be removed from the surface of the printing form by a squeegee or wiping roller, which leads to problems with disposal of removed in this way from the printing plate of printing inks.

The present invention was based on the task to provide the opportunity for economical consumption of printing ink, while preserving, respectively, increasing the clarity of impression on the touch, without the changes resulting color impression compared with the same imprint, obtained by a traditional method of metallographic printing.

This task is solved by the distinguishing features presented in the independent claims. Preferred embodiments of the invention are given in the respective dependent claims.

Proposed in the invention of the printing form for metallographic printing has on its surface at least one engraved area having one or more structural elements that have their regional area is etched to a greater depth in comparison with the opertion is Noah, on which is engraved in their internal site, and have such further regional area and the inner area directly adjacent to each other, respectively, pass directly from one to another and the inner section is designed as a platform located below the surface of the printing form. Engraved in the proposed in the invention of the printing form structure, which is printed on the basis of getting the appropriate stamp or printed image, preferably has several similar structural elements.

The difference in the depth, on which is engraved in regional areas and internal areas, increases the conspicuity to the touch received proposed in the invention by way of impression, because the sealed area of the storage medium is compared with the received known from the prior art methods by the impression of a much more complex relief structure. When this sealed area has a cross section of a kind of corrugated or grooved profile, well distinguishable to the touch when holding your finger on it even with a light touch. Due to frequent rotation tangible to the touch boundary sections and inner sections of reinforced characteristic performed metallographic printing impression of its tactile appearance. When the appropriate size is pax engraved plots the transition between the bumps and hollows in the impression is easily distinguished by touch, and so different edge, respectively, of the internal parts individually distinguishable.

In addition, we offer in the invention, the solution provides for the same or even improved distinctness of impression on the touch savings in printing inks, as to give the impression the necessary tactile texture thicker layer of printing ink needs to be applied only on its boundary area. On the inner area on the canvas you want to transfer only such quantity of printing ink, which is necessary to achieve the desired color tone. With this in mind, the internal areas you want to engrave in printed form at shallower depth compared to the depth of the etching flank areas, resulting in significantly reduced fill the printed ink, the total volume of the engraved section of the printing form. Proposed in the invention, the approach allows also to avoid when printing some problems when filling the paint large engraved on a particularly large depth of the grooves, and, in particular, issues such as spraying ink from the engraved recesses of the plot printing plates in the printing process or incomplete transfer of ink from the engravings on the surface of the printed substrate. Regional plot engraved in printed form the recesses may have any shape in cross section, however, it is more reasonable to give it a wedge-shaped or trapezoidal in sectional shape. In addition to the regional area can also be given in the cross-section of a stepped shape, i.e. to perform this boundary plot with different engraving depth. If the engraved areas that receive the imprint of several structural elements of their regional sites may independently of one another identical or different cross-section shape. So, for example, the edge portion of one structural element can be performed with wedge and edge section of another structural element with a trapezoidal profile.

In principle, the geometric parameters of wedge-shaped and trapezoidal shape in cross section may have regional sites, no restrictions, i.e. the ratio of the lengths of their sides and sizes of angles can be selected by the expert without any restrictions.

As indicated above, the inner section is made in the form located below the surface of the printing form fields, having a sectional shape of the plateau, i.e. its surface lies in a plane passing preferably parallel to the surface of the printing form. It is obvious that the inner section can have a different design with a sloped location of the surface relative to the surface of the printing form.

The surface of the ü internal area may be giving her a rough figure, ensures retention of the printed ink. Having such a rough figure, it is advisable in the case when the length and width of the inner area exceeds about 100 μm. A defined surface roughness can also give a bottom surface of the trapezoidal or rectangular in cross-section boundary of a parcel when its width and length is not less than about 100 microns. Such a rough figure to give a bottom surface in the area where the surface of the printing plate is removed the material, the etching method can be described, for example, in WO 97/48555.

The regional area and the inner area, as described above, immediately adjacent to each other, respectively transform into one another, i.e. not separated from each other by partitions, ending at the level of the surface of the printing form. In accordance with that obtained in the subsequent print these regional and internal parts are not separated from each other unsealed (whitespace) sections.

The depth and width of the engraving boundary, respectively, of the inner sections of the structural element is selected by a specialist so that in the subsequent imprint printed structural elements which are received with respective engraved structural elements, had the required width, the thickness of the paint layer and the color tone.

When using for metallographic printing commercially available printing inks depth, on which is engraved the regional area, is from about 60 to 150 μm, and the depth to which engraved the internal area is approximately from 10 to 120 μm.

More preferably the regional area to engrave on the depth component from 100 to 150 μm, and the inner area to the depth, comprising from 60 to 100 μm. With these values of the depth of engraving of the regional area and the inner area the thickness of the paint layer in the lamination obtained using commercially available printing inks for metallographic printing, reaches values at which ink has already become opaque and lose their translucent properties, i.e. in which the imprint obtained engraved on the appropriate depth of the printing plate has only one color tone. Thus there is an opportunity to get the impression that throughout occupied the area has a uniform color tone and which has not differing in color from the rest of its parts, but nevertheless clearly visible on the touch path.

When the engraving depth is less than approximately 60 microns printing inks have the imprint of the translucent properties. With these values, the depth of engraving printing inks are no longer opaque, i.e. the color tone of the print depends on the thickness of the paint layer. When the engraving in pechat the y-shaped recesses, the depth of which corresponds to the specified values, such printing plates can be obtained prints with discernible to the touch and differing in color from its internal contour plot. There is also the possibility to combine opaque boundary plot with translucent inner section.

In addition, the implementation of the internal area in the form of a pad, the surface which is not parallel to the surface of the printing form, and inclined to it, allows for the use of translucent inks to get on the domestic portion of the structural element is a smooth color transition from light to dark.

In addition, the engraving depth of the regional area can be smoothly, respectively discretely to increase or decrease, for example, along the length of the engraved line. If executed in the printing form engraving of several proposed in the invention the structural elements of their regional and internal parts can independently from each other to have the same or different engraving depth.

Thus only one variation of the depth of the engraving on the marginal and internal sites provides a variety of opportunities for combining between the printing elements and the design of the stamp.

The width of the engraving of edge and interior sites is determined mainly special the awns of the desired imprint. Usually the width of the engraving of the regional area is from 120 to 500 μm. The inner plot automatically acquires in the process of etching the structural element of some width, which is determined by the width of the engraving of the structural element, the width of the engraving of the regional area and the engraving depth of the inner section.

The structural element can be a have any geometric shape element, for example, be in the form of lines of varying width, preferably of a width up to 3 mm or more, or the same type of elements, for example, round, triangular, quadrangular, or an asymmetric contour, as well as to have the appearance of a picture, respectively, of fine character, font character or other symbol, the font characters preferred alphanumeric characters. In addition, there is also the possibility to combine several structural elements in any number and any shape. It is obvious that proposed in the invention of the printing line and/or elements can be combined with lines and/or items, printed by other means, such as traditional metallographic printing, offset printing and other common printing methods.

Proposed in the invention of the printing form for metallographic printing is preferably made by gra is investing rapidly rotating chisel, pointed at the cone end of its working parts. However, in accordance with the contour of the printed area on the surface of the printing form by means of engraving tool perform the corresponding recesses, the depth of which is purposefully varied by changing the depth of the engraving tool in material form, and which subsequently fill for printing ink. In the printing process is the transfer of printing ink from the recesses in the printed form on the surface of the printed substrate. With raw, i.e. not engraved, surface areas of the printing form-based paint on the canvas is not tolerated.

When the sealing is described directly above method media on its surface depending on the shape described above engravings on offer in the invention of the printing form, remains the appropriate impression. This medium differs according to the invention by the presence of at least one printed structural element, which is obtained by the method of metallographic printing and in which the paint layer on its boundary area and the inner area has a different thickness. Such a regional area and the inner area directly adjacent to each other, respectively, pass directly from one to another, the thickness of the ink layer on the edge area is greater than the thickness of the beauty of the aqueous layer on its inner area, and the inner section is designed as a platform located below the surface boundary of the site. Sizes covered with layers of paint sections of print, such as their width and thickness present to them the paint layer, are as described above, the depth and width of grooves made in the proposed in the invention of the printing form engraving and depend on the applied printing ink. It is obvious, however, that the transitions between edge and interior areas of the imprint, as well as the edges and corners of the printed areas may not have as clearly defined contours that is made on the printing form engraving. This is due to the fact that depending on the composition specifically used printing inks and basketcount, and depending on the depth of the recesses made in print form prints the specified transitions between edge and interior areas of the imprint, as well as the edges and corners of the printed areas get the impression more or less blurred contours.

As noted above, the difference in the thickness of the paint layer at the boundary areas and internal areas increases perceptible to the touch received proposed in the invention is a method of printing a structural element of the print, since the sealed area of the storage medium is compared with the received Izv the STN from the prior art methods by the impression of a much more complex relief structure. When this sealed areas have in cross section a kind of corrugated or grooved profile, better distinguishable to the touch when holding your finger on it even with a light touch. In appropriate amounts, engraved plots the transition between the bumps and hollows in the impression clearly distinguishable to the touch, and therefore different edge, respectively, of the internal parts individually distinguishable.

In addition, we offer in the invention, the solution provides for the same or even improved distinctness of impression to the touch the save ink, because the inner parts of the imprint of the printing ink is applied over a thin compared to the marginal areas of the layer.

The thickness of the paint layer at the boundary and internal sites is also determined by the covering power of conventional printing inks for metallographic printing, which, on account of this can be put on a base in the form of opaque paint or to a certain extent, semi-transparent and translucent colors. Drawing on the basis of the printing ink layer of a certain thickness when properly selected background color allows you to obtain a color tone different brightness, respectively, of the lightness and color saturation. At a sufficiently large difference in the thickness of paint layers can be achieved easily discernible to the human eye without the AC is their any auxiliary means of the contrast between the individual elements of the printed image. This assumes the presence of normal lighting conditions and the normal distance between the human eye and in his field of vision of the object (media).

When using printable proposed in the invention method coverts printing inks obtained with the help imprint regardless of the thickness of the paint layer is uniform throughout space required color tone and thus has not differing in color from the rest of its parts, but nevertheless clearly visible on the touch path.

When using printable proposed in the invention is a method of semi-transparent printing inks the color tone of the print depends on the thickness of the paint layer. Thus, depending on the thickness of the paint layer, you can get prints with discernible to the touch and differing in color from its internal contour plot or you can combine print opaque boundary plot with translucent inner section.

In other respects, in relation to the colorful layers on the interior and boundary parts of the imprint regarding various capabilities of their registration is true all of the above in relation to prints made in printed form.

Proposed in the invention method can be used to seal all suitable for metallographic printing materials, such as Boo the Aga, a polymeric film, laminated polymeric film or varnished paper, and laminated composite materials. Proposed in the invention method can be used primarily for sealing media, which must meet the highest requirements regarding their protection from forgery and which are protected from fraud and valuable documents, such as banknotes, stocks, bonds, certificates, cheques, counterfeit labels and other similar documents.

Other embodiments of the invention and its advantages are discussed below in more detail with reference to the accompanying drawings. It should be noted that the proportions shown in these drawings, elements not necessarily correspond to the actual ratios of sizes, and are used primarily for a more visual explanation of the underlying principles of the invention.

Attached to the description of the drawings in particular, it is shown:

figure 1 is a fragment proposed in the invention of the printing form in cross section,

figure 2 is a fragment of a conventional printed form in cross section,

figure 3 is a view in plan schematically banknotes and

figure 4 is a fragment of sealed media in the context.

Figure 1 in section shows a portion of the printing form 1, the surface 2 which carry the Jena engraving 3 wide and, recesses which are filled with printing ink. Width and such prints may be approximately 3 mm or more. Engraving consists of two edge sections 4 and 5 and the inner section 6, with regional areas immediately adjacent to the inner section, respectively, pass directly to him. Bottom internal surface area giving it additionally has a roughness figure 7, ensures retention of the paint. Regional section 5 has a wedge-shaped profile, and the regional area 4 has a trapezoidal profile. The wedge-shaped profile, the width d of its bottom surface is equal to 0 μm, respectively, due to the presence of stichele a certain spatial extent of about 0 microns and may be as high as 10 μm. The trapezoidal or with a different rectangular shape of width d its bottom surface is from 10 to 500 μm. When used for etching stichele, the working of which has the shape of a cone with a rounded top, it must be considered that cuts this chisel is deepening will also have rounded corners and edges. In accordance with this engraved like a chisel edge portion will be in cross-section, for example, the geometric shape of a wedge with rounded top. In addition, in printed form at great depth can also graver is to only one recess to receive the result, instead of two edge sections of only one regional area. This one is etched to a greater depth boundary area is most appropriate to use, for example, in the case where the printed image or impression you want to get going with one side closed freehand or you want to highlight and contour and solid geometric shapes, such as circle. Similarly, this regional section outlining the contour of the prints and cuts formed at greater depth of the recess can also be provided only at a single site. So, for example, engravings, having the contour of a rectangular shape, it is possible to provide only one engraved on the great depth of the edge area corresponding to one of the sides of this rectangle. The regional area is characterized further by the depth and width of its engraving, as well as angles α and β tilt it to the side surfaces, while the presence of several regional stations they independently from each other may have the same or different values of depth and width of their engraving, as well as the angle of inclination of the lateral surfaces. In this example, the edge area 4 has a depth of engraving tRwidth of the engraving b and the angles α and β the inclination of the side surfaces. Regional section 5 also has the same depth of engraving tRand the corners α and βthe inclination of the side surfaces, but has a different width engraving with. Corners α and β the inclination of the side surfaces of about 5 perpendicular conducted to the surface of the printing form, preferably comprise from 30 to 60° and can be selected independently from each other. Regional areas it is advisable to make the same, i.e. trapezoidal or wedge-shaped, in cross section form and execute them with the same depth and width of the engraving, as well as the angles of the side surfaces. The inner section has a depth of engraving tIwhich is less than the depth of engraving tRthe regional area. The width of the engraving E. internal area is determined by the width and prints, geometric sizes of the marginal areas and the depth of their engraving tI.

Figure 2 shown in the cross section of the printing form 8 with engraved according to the prior art surface 9. Available at this printing form engraving 10, recesses which are filled with printing ink and a bottom surface which has a rough figure 11, ensures retention of the paint is not proposed in the invention of the division's areas of lesser and greater engraving depth. This engraving is constant across its width depth t. The appearance of such engravings on the touch is determined by its depth t and a width f, which have constant values across the breadth of this g is auroy square, no offer in the invention pronounced relief. Such prints due to its constant depth of fill volume printed ink area compared to the proposed in the invention of the printing form by an amount equal to the amount missing from this engraving of the middle section, and therefore, to obtain a print with the same as obtained using the proposed in the invention of the printing form of the imprint visibility on the touch and to create in the application of finishing coat same as obtained using the proposed in the invention of the printing form of imprint, color impressions require a significantly larger amount of ink.

Figure 3 as an example of the carrier 12 information schematically shows a banknote. Usually on the bill provides reprints of various types. So, for example, shown in the drawing banknotes has made offset printing background pattern 13 of the thin lines (gelose) and made high printing serial number 14. On the banknote there is a next print 15, reproducing the digit "5". The seal 15 is received conventional metallographic printing.

Proposed in the invention of the stamp, which can be obtained, for example, by means shown in figure 1 printed forms, there is shown in the drawing banknotes only one of its individual plot and consists of C is printed area 16, reproducing the portrait image. Various tones of this image is transmitted by varying the distance between the lines and/or their width. In addition, each available in portrait image line corresponds to one printed proposed in the invention by way of structural element. Peripheries and the inner section of each of these structural elements immediately adjacent to each other, i.e. directly into each other, and printed metallographic printing colorful layers of different thickness, the thickness of the paint layer in the boundary area greater than the thickness of the paint layer on the inner section. When the sealing media proposed in the invention method effect, consisting in saving ink, most pronounced especially when using the printed area of the information carrier exceptionally large number having the form of lines, structures, i.e. at high density with such lines structures in the printed image (impression). An example of a site with a high density of printed lines shown on the drawing the portrait image is, for example, section 17, which shows the hair. If further assumed that the section 17, which shows the hair, may the depending on the specific portrait image to occupy about half of the total area of portrait images which in turn can take from half to one-third of the total area of the banknote, in the manufacture of banknotes in the amount of several billion pieces significantly reduces the consumption of printing ink and thereby significantly reduce production costs.

Figure 4 in section depicted sealed according to the invention the area of the media information received, for example, when use is shown in figure 1 of the printing form when d=0 μm to print individual hair in the portrait image, shown in figure 3. In the process of printing media 12 information is pressed against the printing form carrier 12 information as a result of its being pressed into the grooves in the surface of the printing form engraving 3 is subjected to embossing, and at the same time on the upper side 18 of the carrier information of the recesses prints 3 is transferred to fill them with the printing ink 22. The thickness of DRthe paint layer in the boundary area and the thickness DIthe paint layer on the inner area defined by a distance not sealed from the surface of the substrate to the surface layer of paint on each of the sections 19, 20 and 21, respectively. Thus, present at a sealed section of the media layer of paint has on the marginal areas of greater thickness compared to the thickness at the internal site and clicks is not discernible to the touch print. In this embodiment, the layer of paint on both edge sections 19 and 21 have the same thickness and wedge-shaped profile. However, in another embodiment, the paint layer may have on each of the boundary sections 19 and 21 of different thickness and/or different profile. Depending on the thickness of the paint layer printing inks are translucent properties, respectively coverts, and therefore peripheries and the inner area perceived by the human eye as a homogeneous surface, when they are covered with extremely thick paint layer, or as visually distinguishable one from the other areas, when they are covered with a thin paint layer.

The advantage of the proposed invention is that the sealing of the inner sections of the imprint layer of colorful smaller thickness compared with the thickness of the paint layer applied to the marginal areas of print, provides significant savings in printing inks. In this case, however, is retained, increasing the clarity of impression on the touch, since the peripheries of the seal due to the presence on them of the paint layer larger than the inner section thickness make a relief print more pronounced. Effect consisting in saving ink, most pronounced especially when using opaque paints. Since ODA is divided by the thickness of the paint layer visually perceived color tone ink remains unchanged, i.e. even if you increase the thickness of the base layer of paint over a certain value color imprint already becomes darker as the degree of saturation was reached. In accordance with this to create the visual impression of a uniformly colored surface of the inner section of the seal is quite enough to seal the paint layer directly such thickness, in which the color tone becomes very dark. Provided by this save ink can significantly reduce production costs.

1. Form for metallographic printing designed to produce a printed image or print and having at least one engraved area on its surface, characterized in that the engraved area has one or more structural elements that have their regional area is etched to a greater depth compared to the depth to which carved their internal site, and which also regional land and inland areas immediately adjacent to each other, respectively, pass directly from one to another, and the inner section is designed as a platform located below the surface of the printing form.

2. Printing form according to claim 1, characterized in that the edge area has a cross section of clinoid the th or trapezoidal shape.

3. Printing form according to claim 1, characterized in that the edge area has a cross section shaped wedge with rounded top.

4. Printing form according to any one of claims 1 to 3, characterized in that the internal surface area is giving her a rough figure, ensures retention of the printed ink.

5. Printing form according to any one of claims 1 to 4, characterized in that the edge area is etched to a depth of tRconstituting from 60 to 150 μm, preferably from 100 to 150 microns.

6. Printing form according to any one of claims 1 to 5, characterized in that the inner area is etched to a depth of tIconstituting from 10 to 120 μm, preferably from 60 to 100 microns.

7. Printing form according to any one of claims 1 to 6, characterized in that the edge and interior plots engraved on each such depth, in which all sealed areas in the impression perceived by the naked eye as having the same hue.

8. Printing form according to any one of claims 1 to 7, characterized in that the boundary area has a width b of the engraving, which is from 120 to 500 μm, and the width d of the bottom surface constituting from 0 to 500 ám.

9. Printing form according to any one of claims 1 to 8, characterized in that the structural element is designed as font and/or graphic, respectively, of fine character.

10. Printing form according to any one of claims 1 to 8, characterized in that crostructure element is designed in the form of a line.

11. Printing form according to claim 10, characterized in that the width and the line is from 0.1 to 5 mm, preferably from 0.5 to 3 mm.

12. The media made by the method of metallographic printing the printed image or print that has at least one portion coated with a paint layer, characterized in that the specified area of the printed image or print has one or more printed structural elements in which the thickness of the paint layer at their boundary area is greater than the thickness of the paint layer on the inner section, with the paint layer on the domestic portion forms a space below the paint layer at the regional site.

13. The information carrier according to item 12, characterized in that the difference in the thickness of the paint layers in the boundary area and the inner area can be distinguish by touch.

14. The information carrier according to item 12 or 13, characterized in that the edge area has a cross section of a wedge-shaped or trapezoidal.

15. The information carrier according to any one of p-14, characterized in that the color in the boundary area and the inner area has the same tone.

16. The information carrier according to any one of p-14, characterized in that the color in the boundary area has a darker tone compared to the tone color on the inner section.

17. The information carrier according to any one of claims 1 to 16, characterized in that the printed structural element has the appearance of a font and/or graphic, respectively, of fine character.

18. The information carrier according to any one of p-16, characterized in that the structural element has the form of a line.

19. Media in p, characterized in that the line width is from 0.1 to 5 mm, preferably from 0.5 to 3 mm.

20. Method of making printing plates for metallographic printing, designed for sealing the substrate surface by the method of metallographic printing, namely, that prepare the workpiece for a printed form with the appropriate surface and then on the surface of the workpiece to the printing form by means of engraving tool engrave at least one engraved area so that he had one or more structural elements that have their regional area is etched to a greater depth compared to the depth to which carved their internal site, and have marginal land and inland areas immediately adjacent to each other, respectively, pass directly one another, and the inner section is designed as a platform located below the surface of the printing form.

21. The method of metallographic printing for printing an image or impression with others the application of the printing form according to any one of claims 1 to 11.



 

Same patents:

The invention relates to a printed form, used as a cliché for direct imprint image

FIELD: metallographic printing.

SUBSTANCE: form is meant for producing printed image or imprint and has at lest one engraved portion on surface with one or more structural elements. Edge portion of structural elements is engraved for greater depth compared to depth, at which their inner portion is engraved, edge portion and inner portions are directly adjacent, directly merge into one another and inner portion is made in form of area, positioned below surface of printed form.

EFFECT: higher efficiency, lower costs.

4 cl, 4 dwg

FIELD: printing.

SUBSTANCE: method comprises exposing photosensitive layer applied on magnesium plate to ultraviolet radiation, etching in nitrogen acid, removing photosensitive layer, washing in fresh water, and drying.

EFFECT: enhanced quality of printing plate.

3 cl

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: method for manufacturing "intaglio" deep printing forms.

SUBSTANCE: in accordance to the method, a laser is used to manufacture the form on basis of brass alloy and/or with external layer of brass alloy, with recesses and/or lines, where Vickers rigidity of the brass alloy exceeds 140.

EFFECT: form manufacture stages are shortened.

2 cl, 2 dwg

FIELD: printing industry.

SUBSTANCE: invention relates to a method and device for manufacturing moulds for engraved printing, intended for production of security papers, which uses a laser beam (2) for engraving pattern (3, 3.1, 3.2, 3.3) of engraved printing directly on the surface of the moulding material (1), in particular metal, made with the ability of laser engraving. Laser engraving of the moulding material (1) is carried out in layers in several separate stages of engraving. The stages are carried out one after another with the absolute register so that the pattern (3, 3.1, 3.2, 3.3) of engraved printing is gradually engraved on the surface of the moulding material (1) to the required depth of engraving. The surface of the engraved moulding material (1) is cleaned from wastes of a process of laser engraving after each separate stage of engraving, while the laser engraving unit is in the inoperative state.

EFFECT: improvement of quality of engraving.

24 cl, 10 dwg

FIELD: printing.

SUBSTANCE: printing element with deepened parts comprises the print area on the surface of which a large number of deepened parts is formed, and the gap area, on the surface of which the deepened parts are not formed, and the surface is brought into contact with a viscous material such that the viscous material is accumulated in the deepened parts, the excess viscous material is scraped from the surface by the installation of the squeegee projecting horizontally from the surface, and relative movement of the squeegee. In addition the printing element with the deepened parts comprises the substrate element having the print area, on the surface of which a large number of the deepened parts is formed, and the gap area, on the surface of which the deepened parts are not formed, and the DLC coating, formed so as to cover the print area and the gap area. The surface has a plurality of grinding traces, which are formed by grinding the DLC coating and form an angle of inclination which is different from 0° and 90°, relative to an imaginary continuation of the squeegee projecting horizontally from the surface.

EFFECT: printing element with the deepened parts is provided, which solves the problem of fogging, and the method of its manufacturing.

23 cl, 6 dwg

Up!