Method of producing engraved plate

FIELD: process engineering.

SUBSTANCE: proposed method of producing plate for intaglio printing consists in programmed engraving of the plate made by computer-aided engraving tool. Artwork depth pattern is produced for, at least, a portion of bonds. Note here that said pattern comprises data on 3D elements with data on engraving depth in said plate. Artwork reference depth pattern is produced for plate to be engraved. Note here that said pattern consists of assemblage of repetitions on said artwork pattern complying with that of lines and columns and comprises data on position of said repetitions in the plate plane. Then, plate is engraved to comply with produced reference depth pattern.

EFFECT: higher quality of plates, reduced production time and costs.

9 cl, 15 dwg

 

The invention relates generally to the field of gravure printing for the production of securities, in particular banknote.

More precisely, this invention relates to a method of manufacturing an engraved plate for gravure printing of sheets of securities, in which nigroviolacea plate undergoes programmed engraving process using a computer, which controls the engraving tool.

Traditionally, the manufacture of the plates by the method of gravure printing is a lengthy and complex process that begins with hand engraving a steel or copper plate, make a copy of the specified first plate, add other elements using chemical etching, producing several plastic reprints of this end plate of the original, welding them together and pass through a significant amount of the electroplating bath to obtain the final product, and the printing plate (plate) for gravure printing must be installed on the machine. The whole process of manufacturing plates may require several months and, therefore, is very time consuming and expensive.

In the application EP 0322301 described a little shorthand method for manufacturing steel plates by intaglio with stage electroerosive processing. First get copper contracep and is prepared manually copper plates of the original using an electric formation. After this, contracep used as the electrode in the process electroerosive processing, in which the electrode and the steel plate, which must be engrave, are moved relative to each other. Thus, this method does not avoid prolonged and complicated production of handmade plates of the original. Actually this method of manufacturing a wafer is not used in the printing industry securities, as the plates do not have the necessary precision.

In the application WO 97/48555 described the process defined above type for the manufacture of steel plates with deep drawing, which eliminates the step of hand engraving. In a linear pattern chosen by the surface elements, and the boundary surface element specifies the nominal paths. Each nominal path for which distributed the nominal depth, then calculate the route tool. Then engraving tool, laser, or cutter, is controlled so that the removed part of the surface of the plate corresponding to different surface elements. Part of the surface element, the remote on a predefined depth, can be further enhanced by the additional step of etching, so that the depth of this surface element is not necessarily constant. However, clarity otherwise the data image below, than the clarity of the picture of the original, as it is related to depth change.

In the application WO 96/26466 described a method of manufacturing a polymer intermediate plate for gravure printing using photoablation, which also eliminates the manual process of engraving. First image corresponding to the template is converted into a mask, which has opaque and transparent parts. The light from the excimer laser generates a polymeric working the workpiece image mask area, and the transparent portions correspond to regions that are removed in the harvesting. The mask and the workpiece are moved in such a way as to provide a scanning image. Because the mask is an image composed only of transparent and opaque parts, this method does not use information relating to a variable depth, and does not provide precise control of the depth of the engraving.

In the patent DE 10044403 described method of gravure printing, creating a grayscale image, presents a mixed linear structures. In the first stage, the image in the form of pixel data is provided and displayed using the computer. The designer analyzes the image in the form of variables and different linear structures. Then the data corresponding linear structures, remember the computer in vector data format. On the trail is the next stage of engraving formatted vector data control engraving tool thus, the engraving plate for gravure printing, the following data, the corresponding linear structures.

One object of the present invention is to reduce processing time and cost of wafer production method of gravure printing by eliminating the tedious steps of engraving vignettes and portraits manually.

An additional objective is to simultaneously maintain a high level of quality of the plates by the method of gravure printing, as traditionally manufactured, that is, to get very clear cut engraving.

Modern practice in the printing industry securities provided by the Union of several printing processes on the same securities, that is, to subject the sheet securities to many different printing processes for a more difficult play fakes. As examples of other printing processes used in the printing industry securities, especially banknotes, can result in offset printing, screen printing, mounting film and digitizing.

Known fact in the printing industry securities is that the method of gravure printing causes warping of the sheet because of the high pressure seal is required to compress the sheet of paper to the cliché plate. Other above-mentioned printing processes used to create the project of the same sheet, do not cause such distortion. As a result of this warping is not all prints from different processes will be combined on one sheet. The term “sheet” refers in this description as a separate, generally rectangular sheets of paper, and continuous strips of paper.

An additional object of the present invention is the elimination of this distortion so that all the prints obtained using different printing processes will be adjusted.

These tasks are accomplished by using the method as described in the introduction of the present description, in which are mentioned the programmed process of engraving engrave nehruvian plate in accordance with the three-dimensional control of the pixel data (X, Y, Z) maps the reference depth mentioned plate, with the specified map reference depth is formed at least with one card reference depth stored in the computer, and referred to the map reference depth is a three-dimensional bitmap image of at least part of one of the mentioned securities in which the elementary stage of engraving associated with three-dimensional data of each pixel.

Thus, the present invention is based on the use of a depth map, which is a computer file that contains a three-dimensional raster image is laid on the engraving, on the plate, as the engraving of the working of the workpiece and the tool operating in accordance with the depth map information.

Preferably engraving tool is a laser engraving device, and the elementary stage laser engraving is associated with each pixel of the bitmap. The depth of etching is set to each pixel data of the bitmap. Successive stages of engraving can follow the column of the pixel plate, then the adjacent column, etc. As located adjacent diagonally pixels can show the same depth, corresponding, for example, a line drawing, the finished plate provides an image corresponding gravure printing, while the manufacturing process of the plate corresponds to the bitmap image.

Plate, which engrave, may be a gravure printing plate. Plate, which engrave, may also be intermediate plate for gravure printing plate, which is then further treated with metallization, as known from the prior art.

Three-dimensional bitmap image associated with this valuable paper, contains information relative to the coordinates (X,Y) location of each pixel together with the information(Z) depth, associated with the same pixel.

It is obtained by processing one or more three-dimensional elements. These elements can be:

(a) three-dimensional linear Marov;

b) three-dimensional raster image, especially bitmaps protection;

C) three-dimensional elements, consisting of a number of flat areas, built-in or not, of different depths and shapes;

d) three-dimensional scan of relief.

Such three-dimensional linear Marov can consist of a sequence of segments, where each segment has its own specified length, width, and depth.

Three-dimensional raster image can be directly formed using the computer or received from a scanned drawings or designed using computer drawings, which are processed by the algorithm, which determines the depth of each pixel of the bitmap. The algorithm links the depth of each pixel so that the bitmap like the line proles observed in hand engravings.

Map reference depth provides many repetitions card depth of the original engraved plate and contains information about their locations in the plane of the plate. Thus, the map reference depth can provide a number of repeat the depth map of the original in accordance with a pattern of rows and columns.

In accordance with a preferred embodiment of the invention map reference depth contains information about the warping of the sheet in the process of gravure printing and parameters to compensate for the above-mentioned warpage.

Map reference depth can be continuously contain the pixel data for the engraving of the whole plate, in particular the pixel data generated in accordance with information, to compensate for warping of the sheet.

The computer may also store map (maps) the depth of the original corresponding to one security, and the parameters of the distortion correction so that the data depth map template was generated quickly during the engraving process to save time and disk space.

Other features and advantages of this invention will be clear to experts in the art from the following description of a preferred variant of the invention, referring to the drawings, in which:

Fig. 1 schematically illustrates a method of manufacturing a plate for gravure printing of the prior art;

Fig. 2 schematically illustrates the content of the method of this invention, intended for the manufacture of plates for intaglio printing;

Fig. 3A illustrates a three-dimensional line, and Fig. 3b illustrates a three-dimensional image is the group of linear moire;

Fig. 4 illustrates a three-dimensional bitmap;

Fig. 5 illustrates other three-dimensional image;

Fig. 6 illustrates a three-dimensional depth map of the original;

Fig 7a, Fig. 7b and Fig. 7C illustrate the depth map of the original;

Fig. 8 illustrates a map reference depth;

Fig. 9a, Fig. 9b, Fig. 9c and Fig. 9d illustrate embodiments of the present invention.

Fig. 1 schematically illustrates the method known from the prior art, traditionally used in the factories printing of securities for the manufacture of plates for intaglio printing.

The first step is hand engraving on steel or copper matrix image with depth, like the portrait. This step requires months of skilled engraver.

The second step consists in making copies of the engraved manually matrix and adding using chemical etching other lines on the matrix. These lines can be generated using computer image protection, printed during the process of gravure printing.

The third step consists in the manufacture of plastic sheets of this matrix. Will be made so many impressions, how many documents will be security printed on each sheet.

The fourth step consists in cutting the prints to shape.

The fifth step consists in accommodation is mentioned cropped prints in rows and columns, and then joining them together to create a plastic set of multiple images.

The sixth step consists in coating the silver plastic kit set of images.

The seventh step consists of applying a plastic kit of a layer of copper in the bath galvanic deposition of copper to create copper plates.

The eighth step consists in applying a layer of Nickel on the copper plate in the bath for applying a Nickel coating.

The product resulting from all of these stages in the technology of the prior art is the so-called nickel-alto, i.e. with a high Nickel content, which will be used as an intermediate model for the production of Nickel plate for gravure printing, which is installed in printing machines for gravure printing.

Fig. 2 illustrates the main steps of the present invention, which will eliminate at least the first seven stages described in the prior art.

The first step is to create a depth map of the original, which is formed as follows:

1. Carry out the formation of three-dimensional elements with information about the depth. These elements can be, not limited to, the following types:

A. Three-dimensional linear Mary. For example, these Mary can consist of a sequence of segments, where each segment has its own the th specified length, the width and depth. Fig. 3A depicts a magnified portion of the lines with variable width and depth, where the depth of each segment is displayed on the computer screen its color and shades of gray in this black-and-white print screen image. Fig. 3b depicts a simple computer generated three-dimensional linear moire with variable width and depth.

b. Three-dimensional raster image protection, for example, a computer generated or created from scanned hand drawings or computer-generated images, processed using an algorithm that determines the depth of each pixel of the raster image in accordance with the line profiles similar to the profiles observed in hand prints, as illustrated in Fig. 4. For example, profiles can be selected for each line or for any group of lines. The profile types include, but are not limited to, V-shaped and U-shaped profiles of different initial angles and profiles of rectangular shape. Must be set to the maximum depth of the line, and the ratio of the depth lines with line width.

C. Other types of three-dimensional elements, such as three-dimensional elements, consisting of a number of flat areas, nested or not, of different depths and shapes (Fig. 5) or three-dimensional scan of the bas-reliefs.

2. Assemble the three-dimensional element is in the original file with information about the depth, as is illustrated in Fig. 6.

3. Form a depth map of the original. Processing file creates one of the original three-dimensional raster image. Fig. 7a, Fig. 7b and Fig. 7C depict the same depth map with increasing magnification. The depth of each pixel is represented using its brightness level. In Fig. 7C is possible to see individual pixels. Their size corresponds to a resolution of 8000 dpi.

The second step consists in generating the reference depth, which includes information about the repetition and locations on the plate depth map of the original, as well as information about the warping used to compensate for warping of the sheet, which occurs during printing (Fig. 8), for all printing processes applied to the same sheet, were mangled.

Map reference depth used engraving tool, which etches the plate consistently pixels. Laser engraving machines that are capable of transferring the information stored for each pixel, well-known specialists from the technical level.

The map data of the reference depth can be formed quickly during etching to save time and disk space. This is particularly useful when the map reference depth corresponds to the repetition of the depth map of the original.

the illusion in the art will understand, there are many variants of the process of formation depth map.

Three-dimensional elements can be collected in several files of the original, for example, several separate files for non-overlapping elements. Depth map of the original formed from them, may be repeated in the map reference depth in accordance with different rules than simply repeating in rows and columns.

The layout of the matching elements in the original file and the depth map information (X, Y, Z) for each pixel can be subject to different rules depending on the desired final visual effect, for example, whether one item locally overlapped by another (other) or not.

Fig. 9a, Fig. 9b, Fig. 9c and Fig. 9d illustrate embodiments of the present invention.

In Fig. 9a engraving tool is a laser based on YAG (yttrium aluminium garnet), and the engraved plate is a polymer plate, which serves as an intermediate plate for gravure printing. Engraved plate mounted on a rotating cylinder. The laser is moved in a direction parallel to the axis of the cylinder. Control movement of the laser and its intensity, as well as the cylinder rotation is performed with the aid of a computer, which quickly generates data depth map of the original, accept the may into account the compensation of the deformation of a sheet, which is in the process of gravure printing.

A variant embodiment of the invention depicted in Fig. 9b, such a variant embodiment of the invention, described in Fig. 9a, except that the plate is installed on a flat surface. Movement of the laser beam and plate parallel to the plate.

Engraved polymer plates covered with silver, and they serve as intermediate plates for Nickel-alto plates (plates with a high content of Nickel in electroplating baths for the deposition of Nickel.

In accordance with the embodiment of the engraving plate consists of a layered structure containing

the metal plate basics

the adhesive layer

polymer layer.

Polymer layer engrave in accordance with the method of the present invention. Particularly suitable polymers for the process of engraving are polyimides containing a black substance dispersed graphite for increased absorption of the laser beam. This type of material allows for engraving particularly high resolution. An example of a suitable material is a polyimide introduced with graphite, sold under the trade name “Kapton etc” company “Du Pont de Nemours.

In Fig. 9c shows a variant embodiment of the invention, which is similar to the variant of implementation, described in figa, except that the plate is metal and that the laser is an excimer laser.

In Fig. 9d presents an implementation option, which is similar to the variant of the implementation described in Fig. 9b, except that the plate is metal and that the laser is an excimer laser.

These embodiments of the invention are given only as examples, and other embodiments of falling under the scope of the claims, may be developed by experts in the field of technology. For example, there may be many engraving tools, managed card reference depth, and these tools are synchronous manner, in particular, can be used in such an amount engraving tools, how many columns of securities on the printed sheets with the mentioned securities.

1. A method of manufacturing an engraved plate for gravure printing of sheets of securities, in which nigroviolacea plate undergoes programmed engraving process using a computer-controlled engraving tool, characterized in that the method includes
the formation of a depth map of the original, at least part of one of the securities, with the specified depth map of the original includes information about three-dimensional ELEH the customers with information about the depth of etching in said plate;
mapping the reference depth of the plate is subject to etching, the map reference depth consists of many repetitions of the plate is specified depth map of the original in accordance with a pattern of rows and columns and includes information about the position of these repetitions in the plane of the plate; and
engraving plate in accordance with the generated map reference depth.

2. The method according to claim 1, characterized in that the map reference depth further comprises information to compensate for warping of the sheet during the process of gravure printing.

3. The method according to claim 1, characterized in that the said three-dimensional elements include line, while the depth of these lines can be selected for the particular prole for each line or for any group of lines.

4. The method according to claim 3, characterized in that the profile line is selected from the group containing V-shaped, U-shaped, as well as profiles of square shape.

5. The method according to claim 4, characterized in that the maximum depth of the line, and the ratio of the depth lines with line width set.

6. The method according to claim 1, characterized in that the formation of this depth map of the original includes the formation of three-dimensional elements of various types and the three-dimensional arrangement of these elements in one or more computer files.

7. SPO is about according to claim 1, characterized in that the map reference depth is formed quickly in the engraving process.

8. Engraved plate for gravure printing, characterized in that it is derived using the method according to any one of claims 1 to 7.

9. Engraved intermediate plate plate for gravure printing, characterized in that the plate contains a polymeric layer which is to be engraved according to the method according to any one of claims 1 to 7.



 

Same patents:

FIELD: printing industry.

SUBSTANCE: method of manufacturing offset plates by changing the wetting properties of parts of the working surface of the plates, transformation of the properties is carried out by changing the chemical composition of the working surfaces, made from silicon nitride, aluminium nitride and silicon carbide by acting on the selected parts with a stream of accelerated particles.

EFFECT: possibility to simplify and accelerate the process of manufacture, increase resolution and durability of the plates.

7 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: in method of flexographic plates production by direct laser engraving, gaseous decomposition products or products made of separate particles (7) generated in the process of engraving are caught with the help of suction device (4) and exhausted gas flow saturated with decomposition products is purified with the help of combination of filter (5) with solid filtering material and filter (6) with buffer unit and oxidising stage.

EFFECT: increases efficiency of gases purification.

8 cl, 6 dwg

FIELD: physics.

SUBSTANCE: invention pertains to a printing matrix engraved by a laser, used for obtaining a relief image using known methods. Description is given of the printing matrix engraved by a laser, obtained through photocuring a compound on a photosensitive resin base (a), consisting of a polymerised unsaturated group and which has an average molecular mass between 1000 to 20 x 104, an organic compound (b), with a polymerised unsaturated group and average molecular mass less than 1000 and an organic silicon compound (c), with at least, one Si-O bond and not containing a polymerised unsaturated group. Content of the organic silicon compound (c), lies in the range from 0.1 to 10 % of the mass of the compound on the photosensitive resin base. Description is given of obtaining the printing matrix engraved by a laser, through formation of the given compound on a canvas or cylinder with subsequent linking and solidification under exposure to light.

EFFECT: increased resistance of the printing matrix to abrasion and to adhesion on its surface.

19 cl, 2 tbl, 12 ex

FIELD: manufacture of plates used for intaglio printing.

SUBSTANCE: method for making engraved plate with use of tool such as laser beam comprises steps of using engraving tool operating with use of data of depth card formed on base of three-dimensional raster image of printed document; similarly making intermediate engraved plates.

EFFECT: shortened time period for engraving high-quality plates, prevention of warping of plates at printing process.

21 cl, 15 dwg

FIELD: processes and equipment for making printing forms for screen printing, apparatuses for screen printing.

SUBSTANCE: method for making printing forms comprises steps of melting heat sensitive material of printing forms for screen printing having film of thermosetting resin of predetermined thickness by heating thermal head for perforating holes permeable for printing ink; forming large number of shallow recesses in one side of said film. Heaters of thermal head 10 have such size that next inequalities HM > 0.6PM, HS > 0.7 PS are satisfied. Heaters are arranged at pitch PM in side of main scanning direction. Length of heaters along side of main scanning direction is equal to HM. Feed stroke at side along secondary direction of scanning is equal to PS. Length of heaters at side along secondary direction of scanning is equal to HS. Side of film opposite to its side having shallow recesses is heated due to heating thermal head 10 with output 35 mJ/mm2 or less for melting heated zone until its communication with said recesses in order to form holes permeable for printing ink.

EFFECT: possibility for thermally perforating in film individual holes permeable for typographic ink at the same output of thermal head, realization of screen printing process at using material of printing forms for screen printing containing only film of thermoplastic resin.

18 cl, 9 dwg

FIELD: multicolor printing methods.

SUBSTANCE: method involves transferring positive image formed on film onto carbon-treated microporous rubber; dividing portion of microporous rubber of, for example, round shape, which had not been subjected to pulsed light treatment, into n number of sectors of different shapes; creating boundaries between sectors by exposing microporous rubber to thermal action of maximal depth. With 1.5 mm thick rubber, depth of boundary shall be at least 1.1 mm and shall not exceed 1.4 mm, said depth preferably approximating to thickness of rubber. Upon subjecting rubber to thermal action, pores are caked to define boundary, which protects sectors from mixing of inks of different colors. Resultant sectors are further charged with inks of different colors.

EFFECT: provision for creating of high-quality multicolor print.

4 dwg

The invention relates to means for printing, in particular, to methods for producing printing forms for high quality printing

FIELD: multicolor printing methods.

SUBSTANCE: method involves transferring positive image formed on film onto carbon-treated microporous rubber; dividing portion of microporous rubber of, for example, round shape, which had not been subjected to pulsed light treatment, into n number of sectors of different shapes; creating boundaries between sectors by exposing microporous rubber to thermal action of maximal depth. With 1.5 mm thick rubber, depth of boundary shall be at least 1.1 mm and shall not exceed 1.4 mm, said depth preferably approximating to thickness of rubber. Upon subjecting rubber to thermal action, pores are caked to define boundary, which protects sectors from mixing of inks of different colors. Resultant sectors are further charged with inks of different colors.

EFFECT: provision for creating of high-quality multicolor print.

4 dwg

FIELD: processes and equipment for making printing forms for screen printing, apparatuses for screen printing.

SUBSTANCE: method for making printing forms comprises steps of melting heat sensitive material of printing forms for screen printing having film of thermosetting resin of predetermined thickness by heating thermal head for perforating holes permeable for printing ink; forming large number of shallow recesses in one side of said film. Heaters of thermal head 10 have such size that next inequalities HM > 0.6PM, HS > 0.7 PS are satisfied. Heaters are arranged at pitch PM in side of main scanning direction. Length of heaters along side of main scanning direction is equal to HM. Feed stroke at side along secondary direction of scanning is equal to PS. Length of heaters at side along secondary direction of scanning is equal to HS. Side of film opposite to its side having shallow recesses is heated due to heating thermal head 10 with output 35 mJ/mm2 or less for melting heated zone until its communication with said recesses in order to form holes permeable for printing ink.

EFFECT: possibility for thermally perforating in film individual holes permeable for typographic ink at the same output of thermal head, realization of screen printing process at using material of printing forms for screen printing containing only film of thermoplastic resin.

18 cl, 9 dwg

FIELD: manufacture of plates used for intaglio printing.

SUBSTANCE: method for making engraved plate with use of tool such as laser beam comprises steps of using engraving tool operating with use of data of depth card formed on base of three-dimensional raster image of printed document; similarly making intermediate engraved plates.

EFFECT: shortened time period for engraving high-quality plates, prevention of warping of plates at printing process.

21 cl, 15 dwg

FIELD: physics.

SUBSTANCE: invention pertains to a printing matrix engraved by a laser, used for obtaining a relief image using known methods. Description is given of the printing matrix engraved by a laser, obtained through photocuring a compound on a photosensitive resin base (a), consisting of a polymerised unsaturated group and which has an average molecular mass between 1000 to 20 x 104, an organic compound (b), with a polymerised unsaturated group and average molecular mass less than 1000 and an organic silicon compound (c), with at least, one Si-O bond and not containing a polymerised unsaturated group. Content of the organic silicon compound (c), lies in the range from 0.1 to 10 % of the mass of the compound on the photosensitive resin base. Description is given of obtaining the printing matrix engraved by a laser, through formation of the given compound on a canvas or cylinder with subsequent linking and solidification under exposure to light.

EFFECT: increased resistance of the printing matrix to abrasion and to adhesion on its surface.

19 cl, 2 tbl, 12 ex

FIELD: technological processes.

SUBSTANCE: in method of flexographic plates production by direct laser engraving, gaseous decomposition products or products made of separate particles (7) generated in the process of engraving are caught with the help of suction device (4) and exhausted gas flow saturated with decomposition products is purified with the help of combination of filter (5) with solid filtering material and filter (6) with buffer unit and oxidising stage.

EFFECT: increases efficiency of gases purification.

8 cl, 6 dwg

FIELD: printing industry.

SUBSTANCE: method of manufacturing offset plates by changing the wetting properties of parts of the working surface of the plates, transformation of the properties is carried out by changing the chemical composition of the working surfaces, made from silicon nitride, aluminium nitride and silicon carbide by acting on the selected parts with a stream of accelerated particles.

EFFECT: possibility to simplify and accelerate the process of manufacture, increase resolution and durability of the plates.

7 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: proposed method of producing plate for intaglio printing consists in programmed engraving of the plate made by computer-aided engraving tool. Artwork depth pattern is produced for, at least, a portion of bonds. Note here that said pattern comprises data on 3D elements with data on engraving depth in said plate. Artwork reference depth pattern is produced for plate to be engraved. Note here that said pattern consists of assemblage of repetitions on said artwork pattern complying with that of lines and columns and comprises data on position of said repetitions in the plate plane. Then, plate is engraved to comply with produced reference depth pattern.

EFFECT: higher quality of plates, reduced production time and costs.

9 cl, 15 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 industry.

SUBSTANCE: properties of wettability of areas are changed, which are printed elements on the anodic-oxide surface of the substrate. Transforming of properties of wettability of areas of the anodic-oxide surface of the substrate is performed by applying the hydrophobic coating by jet printing device.

EFFECT: method eliminates the use of templates and additional equipment, which simplifies the process of production of printing plates.

4 cl

FIELD: technological processes.

SUBSTANCE: invention relates to field of laser processing and can be used for contoured surface formation on steel embossing shaft. Contoured surface formation represents making of macrorelief with elements dimensions of more than 20 mcm and depths of up to 150 mcm inclusively, by laser exposure with following parameters: energy density in single pulses generation mode is equal to 0.5–3.5 J/cm2, average density of energy in pulses packs generation mode is equal to 0.5–70 J/cm2 per pulse, wave length is 532–1,064 nm, pulse repetition frequency is from 1 kHz to 10 MHz, distance between pulses on part is 10–50 % of beam diameter for femtosecond laser and 10–25 % or 40–50 % of beam diameter for picosecond laser, laser beam focal plane is located on part surface, and beam travel speed is equal to or more than 100 m/s.

EFFECT: use of invention enables to increase preset relief on embossing shaft production precision.

9 cl, 3 dwg

Up!