RU2661991C1 - Method of decorative panel manufacture and decorative relief panel - Google Patents

Abstract

FIELD: decorative art.

SUBSTANCE: group of inventions relates to the field of arts and crafts, namely, to the method of manufacturing a decorative panel. Method consists in formation of a relief image on the face of the foamed polystyrene plate. Removal of the plate material on the face of the plate in accordance with the image pattern is carried out by chemical etching of the plate structure using a large-format printed plotter by metered application of the solvent composition to the surface areas of the plate to be removed by dissolving to produce grooves with a depth directly proportional to the volume of the dose of the solvent composition to be delivered to the site to be removed. Then, drying and evaporation of the residual solvent composition with the chemical etched surface of the board is carried out. After this, priming of the face of the plate is carried out for the subsequent after drying of the primer coating layer of the enamel coating, which is a composition based on ethylene-vinyl acetate dispersion with the subsequent application to the front surface of a large-format plotter of a paint coating based on aqueous, latex, solvent pigmented or sublimation ink, followed by drying, for applying over the protective lacquer coating.

EFFECT: increase in the strength properties of large-format panels and strengthen the relief pattern by using chemical etching of the plate and subsequent coating it with different compositions.

10 cl, 3 dwg

Description

The present invention relates to the field of decorative art, and in particular to the field of creating paintings, murals such as panels on polymer media, in particular, the invention considers a method for creating such decorative panels.

Currently, there are many design types of decorative panels, which are presented in the form of a relief panel.

The use of technology for milling decorative panels from MDF, wood, expanded polystyrene foam or extruded polystyrene foam on CNC machines to obtain the desired relief

(http://www.letostyle.ru/catalog/interior/3dmdf/) also refers to complex technologies and does not allow to obtain fine detail.

The technology for casting gypsum or gypsum-acrylic models involves pouring liquid modified (acrylic) or sculpted gypsum into a mold at room temperature, ripening the mixture, removing the panel from the mold for subsequent processing. For the finished material, coloring, varnishing is possible (http://torgform.ru/tehnologiya-litya.html; http://www.artpole.ru/; http: //newlife-52.rf; http: //www.degesso .com /). For example, TM DEGESSO is an exclusive manufacturer of 3d gypsum panels for walls.

The panels consist of high-strength gypsum reinforced with fibers of an inert mineral polymer, filler and plasticizer. And the Russian manufacturer Rifinitura produces Timber (MU) seamless relief 3D gypsum surfaces with a weight of 19.7-22 kg / m ² . The company also produces a unique Zaha modular system. CeramicEffect gypsum compound panels are a selected combination of gypsum, white cement and mineral binders combined with polyacrylic reinforcing fibers.

Using the listed well-known technologies, a decorative panel with a relief pattern is obtained, which is determined by the pattern in the matrix into which the curable mass is filled. This process of obtaining decorative panels is complex and time-consuming. After solidification, the front surface with a pattern must be processed. In addition, such panels have significant weight. At the same time, the obtained panels based on gypsum, including acrylic, are quite fragile, prone to damage during cutting, and are completely flexible. They have a high density of 1100-1550 kg / m ³ , the thickness is mainly from 28 to 100 mm, the thinnest gypsum plates are produced with a thickness of 15 mm.

The use of liquid polyurethane or low-foamed polyurethane, also poured into the hardening mold (for example, Smooth-Cast Easy Cast Fast - two-component polyurethane plastic, manufactured by USA Smooth-On, Inc, http://www.smooth-on.com or Easy Flo plastic , manufacturer Polytek development Corp. USA, www.polytek.com) allows you to reproduce art objects of high detail, prototype products, production of promotional and presentation products, exclusive souvenir products, furniture decor, modeling and design, milling plates, structural elements second, etc. They have a very short casting time (from 15 minutes to 1 hour). But these materials have a serious drawback, which is. that it is impossible to get a large-area panel. Most products are not flexible. Flexible forms have an unpresentable appearance of rubbers.

The production of 3d polyurethane foam panels was mastered in Russia by SpetsPanel .. The docking of 3d panels is very good, since all products are made in special molds, and polyurethane foam allows you to convey the texture of the picture very clearly (http: //spetspanel.rf). But this product has a drawback: there is no fine detail. The density of the panel is 250 kg / m ³ , which is 4.4-6.2 times less than that of the gypsum panel.

The decorative panels made of rigid polyurethane foam produced by this company have a rectangular shape in plan and are made in the form of a plate with a flat back surface and a textured curved front side to form a deep relief picture (art. "3D polyurethane foam panel", posted on the Internet site on address http: //spetspanel.rf/, 2015). This decision was made as a prototype for the claimed object - device. The well-known decorative panel is a combination of several identical in size individual fragments with a size of 500 mm × 500 mm and a thickness of 20-30 mm, interconnected at the ends. The panel is assembled from small fragments, which is determined by the use of molding machines designed to form plates of a certain size. Obtaining large panels on such installations is impossible. In addition, the formation of a relief pattern with clear fine detail is not obtained. In fact, this panel looks like a wall assembled from tiles or mosaics.

Known panels have common drawbacks in the difficulty of obtaining a relief pattern with fine detail, the inability to obtain large panels with light weight and sufficient flexibility, characterized by an indicator of impact and static resistance to bending.

Most technologies for the production or manufacture of decorative embossed panels are based on the use of casting or molding a textured surface pattern in matrices. It is the use of the matrix in which the reverse drawing is made and the properties of the material molded or cast in this matrix affect the quality of the detailed study of the resulting embossing on the panel. Viscosity, fluidity, internal bonds of the material do not allow to obtain fine details of the picture.

At the same time, such methods of mechanical removal of material are known from the prior art as milling decorative panels from MDF boards, wood, expanded polystyrene foam or extruded polystyrene foam, and others. MDF board (for example, 3d panels from MDO series MONOGRAM, ARCH, BABY, BAMBUC, BABBLE, etc.), wood, expanded polystyrene foam or extruded polystyrene foam are milled by a CNC machine to obtain the desired relief, then treated with impregnation, painted and varnished (http: / /www.letostyle.ru/catalog/interior/3dmdf/). Programmatically, the cutter or milling cutter is set to move in full accordance with the picture developed and digitized. Through numerous passes, they provide the required level of depth. The dimensions of the cutting tool determine the raster of such a picture, that is, its detail. In this regard, it is possible to obtain sufficiently fine detailing at shallow depths of one cut (tool pass), but with an increase in the depth of the cut, the distance between the raster lines increases, since the cutting tool is a volumetric body in certain sizes, including the cutting edge. Such technological methods make it possible to obtain large-scale drawings drawn in large strokes (article "Tips for the processing of polyurethane and foam on a CNC milling machine", posted on the INFOFREZER website on the Internet at https://infofrezer.ru/stati/sovety- po-obrabotke-poliuretana-i-penoplasta-na-frezernom-stanke-s-chpu /), discovered in 2016). This decision was made as a prototype for the claimed object - method.

Therefore, creating a textured surface on a plate using milling refers to labor-intensive methods and does not always allow creating volumetric / embossed images finely worked out with a sufficient relief depth (more than 5 mm for a part 1.5–2.0 mm thick). In addition, the panels obtained from MDF or wood have a very large weight and are exposed to moisture, which requires special serious processing of the entire surface of the panel from all its sides. In any case, such panels are not suitable for outdoor use. The use of such a material as extruded polystyrene foam allows you to get away from such a parameter as the weight and influence of precipitation, but because of the insufficient strength of the materials themselves, special measures are required to increase the spatial bending strength, especially for large panels with a large area.

The present invention is aimed at achieving a technical result, which consists in the use of chemical milling of the plate and its subsequent coating with multilayer compositions in order to increase the strength properties of large-format panels and strengthen the relief pattern.

The specified technical result in terms of the method is achieved by the fact that in the method of manufacturing a decorative panel, which consists in the formation on the front surface of the foamed polystyrene plate of a relief image by removing the plate material in accordance with the image pattern, removing the plate material on the front surface of the plate in accordance with the image pattern carry out chemical etching of the structure of the plate due to the metered application of the solvent composition to be removed by dissolving sections of the surface of the plate to obtain depressions with a depth directly proportional to the volume of the dose of the solvent composition supplied to the removed section, while for the metered application of the solvent composition, a large-format inkjet printing plotter is used to print a digital image file with two parallel print heads with one channel each or with one head with separated channels for an immiscible feed of two types of solvent composition differing in flow rate I am a chemical etching process of foamed polystyrene.

To increase the strength properties and protect the relief pattern of the foamed polystyrene plate after the completion of the chemical etching cycle of the plate, which consists in additional exposure and drying of the surface after solvent surface treatment, priming is carried out, followed by enameling the front and end surfaces of the plate with compositions based on ethylene-vinyl acetate dispersion with fire retardant additives, flame retardants, coated with 2-3 layers of weather-resistant urethane or acrylic-urethane non-yellowing full varnish. The back side of the plate is coated with a flexible plaster composition based on a highly filled styrene-acrylic dispersion of the front surface of the plate for the subsequent application of an enamel spraying coating after drying, which is a composition based on ethylene-vinyl acetate dispersion.

The purpose of these compounds is that they provide good adhesion to polystyrene foam, excellent hiding power, pore filling and fire retardant properties of the finished material, reducing its combustibility, toxicity of combustion products and smoke formation, as well as providing UV stability, which is too weak for polystyrene foam plates.

The enamel coating can be colorfully decorated by applying with a large-format plotter on top of it a paint layer based on water dispersion, latex, solvent pigmented or sublimation ink and fixing the top layer with a varnish coating.

For this method, XPS extruded polystyrene foam or EPS polystyrene foam or autoclaved polystyrene foam or autoclaved extruded polystyrene foam is used as foamed polystyrene. And the back part of the plate is covered with a plaster composition, which is an elastic highly filled thick-layer material based on styrene-acrylic dispersion. In addition, on top of the enamel coating, a layer of a special structural paste can be applied, which is a water dispersion system based on a styrene-acrylic polymer containing fractionated filler, which allows simulating a stony surface on the front side and which is dried before applying a colorful coating, which is dried before applying a colorful coating .

The paint coating is covered with 2-3 layers of matte urethane or acrylic-urethane non-yellowing varnish.

The specified technical result in terms of the device is achieved by the fact that in a decorative relief panel containing a base in the form of a plate of polymer material, on the front surface of which a relief convex image is made, a plate of extruded polystyrene foam or expanded polystyrene, the back of which is used as a plate of polymer material covered with a flexible plaster composition based on a water-dispersed material, while the relief convex image is made by the chemical Government & spray coating primer composition based on aqueous dispersion opaque enamel.

To simulate the surface of the stone texture on top of the sprayed primer composition on the front surface of the plate can be applied a layer of structural paste, which can be painted. In addition, a layer of tinting soil-enamel can be applied to the end surfaces of the plate, covered with a protective layer of varnish on top.

On top of the sprayed primer, a colorful layer is applied to the front surface, fixed with UV-resistant varnish.

These features are significant and are interconnected with the formation of a stable set of essential features sufficient to obtain the desired technical result.

The present invention is illustrated by a specific example of execution, which, however, is not the only possible, but clearly demonstrates the possibility of achieving the desired technical result.

In FIG. 1 is a general view of a large-format plotter;

FIG. 2 - design of a decorative panel made by the etching technology of the front surface layer;

FIG. 3 is a fragment of the panel of FIG. 2.

According to the present invention, a new design of a decorative panel is considered, which can be made detachable or inseparable with a relief-formed pattern on the front side on a large area. Also considered is a method of manufacturing such a decorative panel.

A feature of the claimed method of manufacturing such a decorative panel is the use of a new technology of spot chemical etching of the surface layer of a foam polystyrene plate (XPS extruded polystyrene, or EPS polystyrene, or autoclaved polystyrene, or autoclaved extruded polystyrene) to obtain depressions of different depth / height.

Thick plates of extruded polystyrene foam of various manufacturers, are cut out on a special machine with a heated string on plates of the desired thickness. Some types of polystyrene foam that can be used are: extruded polystyrene foam: XPS (Extruded Polystyrene), Penoplex, Styrex, Technoplex, Technonikol, URSA XPS; autoclaved polystyrene foam: Styrofoam manufacturer of Dow Chemical Company (USA); autoclave-extruded polystyrene foam.

To obtain expanded polystyrene, polystyrene is most often used. Other raw materials are polymonochlorostyrene, polydichlorostyrene, as well as copolymers of styrene with other monomers: acrylonitrile and butadiene. As foaming agents, low-boiling hydrocarbons (pentane, isopentane, petroleum ether, dichloromethane) or blowing agents (diaminobenzene, ammonium nitrate, azobisisobutyronitrile, dichlorodifluoromethane, monochlorodifluoromethane, monochlorodifluoroethane, tetrafluoroethane) are used. Fluorinated blowing agents create a significant greenhouse effect and destroy the ozone layer of the planet. For example, FCKW 12 gas (dichlorodifluoromethane) used in the cells creates a potential greenhouse effect in the amount of 7300 conventional units against 1 cu for carbon dioxide with a potential threat of destruction of the ozone layer 1 cu against 0.06 units for carbon dioxide. Therefore, it is most preferable to use carbon dioxide (carbon dioxide) as a blowing agent. In addition, extruded polystyrene foam includes flame retardants, dyes, plasticizers and various fillers.

XPS extruded polystyrene foam (or extruded polystyrene foam) is a heat-insulating material with evenly distributed closed cells, does not absorb water, does not swell and does not shrink, is chemically resistant to many organic solvents of hydrocarbon and alcohol types and does not rot. High strength allows for the formation of a slab to obtain a smooth and at the same time rigid base, which significantly increases the life of the entire structure. Extruded XPS expanded polystyrene is characterized by chemical resistance, high compressive strength, water and vapor impermeability, as well as resistance to the formation of mold and fungi. Thus, the extruded XPS expanded polystyrene not only provides thermal insulation, but also effectively prevents the effects of a number of other destructive and negative factors, which allows it to be used as a finishing material for rooms after compulsory priming due to poor light resistance and reduced heat resistance.

In general, the method of chemical etching of the front surface of polystyrene with chemical solvents of the ester type is used. This method is aimed at the formation on the front surface of the plate of foamed polystyrene embossed image by removing the material of the plate in accordance with the image image.

The removal of the plate material on the front surface of the plate in accordance with the image image is carried out by chemical etching of the structure of the plate 1 due to the metered application of the solvent composition to the parts of the surface of the plate to be removed by dissolution to obtain depressions with a depth directly proportional to the volume of the dose of the solvent composition supplied to the deleted section. For dosed application of the solvent composition, a large-format inkjet printing plotter 2 is used to print a digital image file with two parallel-working print heads with one channel each or with one head with separate channels for an immiscible feed of two types of solvent composition differing in the rate of the chemical etching process of foamed polystyrene .

Smooth transitions of relief forms up to 12 mm deep are achieved by printing on a plate 1 a digital file with an inkjet wide-format plotter 2 (printer) with two parallel working heads or one head with separated channels (Fig. 1). Type of printer heads that are suitable for this task: Epson dx5, dx6, dx7., For Mimaki, Mutoh, Roland printers.

For these heads or one head with separate channels, 2 different printing fluids are developed, which are supplied separately, without mixing from 2 separate cartridges. The first printing fluid (type I) is either a mixture of type I solvents with solvent, light solvent or eco-solvent inks: Chinese - SK-1, Inex; Japanese - Techno-Jet T-ECO SPT, Israeli - Bordeaux, as well as inks from South Korea such as Sunmicrotek SGE, IST, INKSYSTEM. The ink is mixed in a certain proportion with type I glycol ethers, which add from 25 to 50%.

For the first printhead, it is possible to use solvents without the use of solvent, light solvent and eco-solvent inks. In this case, a mixture of type I and II solvents is used in a ratio of 0.5-1: 1, to which propylene carbonate or Y-butyrolactone is added in an amount of from 2 to 5 wt. % Acrylate-based polymers Degalan 725 or Neocryl B 880 and Neocryl B 817 at a concentration of 8-15 wt.%, Dispersants, for example DOW Corning 67 additive from 0.5 to 2 wt., Are added to the mixture of these solvents. %

To enhance the effect of deep penetration into the structure of expanded polystyrene, used solvents such as I are esters like ethyl methyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, dibutyl ether, and acetate esters of glycols: monobutilatsetat glycol monometilatsetat diethylene glycol monoethyl acetate, diethylene monobutilatsetat diethylene propylene glycol monoethyl acetate, propylene glycol diacetate, dipropylene glycol monomethyl acetate and monobutyl acetate triethylene glycol.

The second printing fluid (type II) is a mixture of type II solvents of a class of glycol ethers, for example: propylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, Dowanol DPnB TPM Dowanol DPnBM, Dowanol TPnBM, Dowanol , Dalpad Filmer, Dowanol PPH in pure water or with microadditives (0.0-2.0%) of esters: butyl lactate, trimethyl-1,3-pentadiol monoisobutyrate, N-methylpyrrolidone.

The second printing fluid, slightly slowing the process of chemical etching of the bas-relief, gives the effect of easy fusion of the edges and the creation of the effect of roundness of the shapes of the bas-relief, which gives a higher aesthetic effect to the product.

The depth of the relief is set by the number of print cycles of the same file, on the same polystyrene foam boards. Plates within 36-48 hours go through the ripening stage, during which a partial deepening and smoothing of the relief takes place and residual solvents evaporate.

The considered method shows how to obtain a three-dimensional relief pattern on the surface of a polymer plate. In principle, such a plate can be considered as a decorative panel, as it combines form and has a relief. However, in reality, such a panel should have a marketable appearance, that is, be protected from external influences and keep its spatial shape not only due to the strength properties of the plate itself.

For this, after obtaining a relief image, the processing of both the plate itself and the relief surface of the image is performed. After the chemical etching process is completed as described previously, drying and evaporation of the residues of the solvent composition with the chemical etching of the surface of the plate are carried out. Then a sequential priming is carried out - enameling of the front and end surfaces of the plate with compositions based on ethylene-vinyl acetate dispersion with flame retardants. After drying, the face layer of the plate is coated with a colorful layer using a large-format plotter using aqueous, latex, solvent pigmented or sublimation inks, followed by drying, for application over a protective varnish coating.

The neckless (back / back) part of the plate is coated with a special plaster composition up to 3 mm thick of raw material using a filling device or manually with a spatula. The stucco composition is an elastic highly filled material based on styrene-acrylic dispersion, which serves as a good adhesive base for installation. The composition is dried in cassettes for 24-36 hours at room temperature. This composition protects the back surface of the panel and maintains its bending strength due to the fact that this composition has some elasticity. When the plate bends, the primer layer does not crack and restores its shape.

Then, enamelled soil is applied to the plate from the side of the relief image with a spray gun. Drying of the enamel is carried out at room temperature with blowing the surface of the plate with a fan in the cassette. This layer of primer enamel fills the pores of the plate material opened during etching, smoothes the surface and gives it smoothness, forms a plain white color, strengthens the face layer.

After the primer-enamel is completely dried, the primer-enamel reinforced with flame retardants, which is also dried in a cassette at room temperature, is applied with a spray gun.

Structural paste, which is a water dispersion system based on a styrene-acrylic polymer, can be applied to these layers. The layer is dried as well as layers of primer enamels. This new layer gives the surface of the image the appearance of a stone structure (imitation stone). In addition, there is a strengthening of the image coverage, increasing its strength.

The plate, if necessary, can be sealed with water-dispersible, eco-solvent, pigment, sublimation, latex or UV-curable inks on an appropriate printer. This allows you to apply a colorful layer to the previously created surface - color painting. Then, on the surface of the plate, if necessary, apply 2-3 layers of matte urethane or acrylic-urethane non-yellowing varnish.

Thus, to increase the strength and operational qualities of panels of large areas and to enable its placement indoors and outdoors (in the external environment), a number of additional operations can be used, namely:

- the back of the plate is covered with a plaster composition, which is an elastic highly filled material based on styrene-acrylic dispersion.

- additionally, a layer of structural paste, on the basis of styrene-acrylic polymer, is applied over the primer-enamel coatings, which is dried before applying the paint coating

- in addition, 2-3 layers of matt urethane or acrylic-urethane non-yellowing varnish are applied over the paint coat.

From the foregoing, we can distinguish the design algorithm of a decorative relief panel in the form of a plate made of a polymeric material (made of extruded polystyrene foam) as a base, on the front surface of which a raised convex image is formed, made by chemical etching and coated with primers using water-dispersed covering enamel with flame retardants, and the back is covered with a flexible plaster composition.

The following is a possible example of a specific embodiment of a decorative embossed panel (Fig. 2 and 3).

A feature of such a panel is that it is made of plate 1 or an XPS extruded polystyrene foam plate, on which a relief convex image 3 is created with a plate thickness of 3 mm to 100 mm and a relief depth of 12 mm, painted with water-dispersed, eco-solvent, UV - Ink or other paints. A panel in the form of a bas-relief may consist of one whole plate or several plates.

The formation of the artistically processed front surface of the panel in the form of a relief bas-relief is obtained by forming depressions of different heights. The depth of the relief surface of the bas-relief is created using a large-format printing plotter by chemical etching with specially selected mixed solvents based on eco-solvent ink or without them, and a strictly defined time is maintained. When applying an eco-solvent composition, the relief depth is obtained deeper where more printing fluid is poured. The appearance of a depression is formed by dissolving the surface layer of extruded polystyrene foam. After the etching is obtained by etching, the solvent is dried and evaporated from the surface of the plate. After exposure, the primer is applied by spraying the primer composition 4 on the basis of primer enamels with flame retardants. Thus, a panel with a rough finish of the front surface is obtained. The application of a primer layer is necessary to fill the open pores of the etched surface of the plate and to give the front wall a flat surface.

The back side of the plate is covered with a flexible plaster composition 5 based on a water dispersible material up to 2 mm thick (dried layer), and a layer of tinting soil-enamel 6 is applied to the end surfaces, covered with a protective varnish layer on top, which allows the product to be used in wet rooms and on building facades. and at temperatures from -25 to + 60 ° C. The use of a flexible plaster composition (highly elastic flexible material) allows you to close the back surface of the slab and at the same time provide some plasticity to this layer with the goal of non-destruction when bending a large panel.

After the primer composition has dried on the textured part of the panel, a layer 7 filled with special crumb of structural paste can be applied on the basis of water-dispersing covering enamel. In this case, the front surface acquires a stone structure. And on a dried base imitating the structure of a stone, you can apply a wide-format plotter to a color drawing on the basis of water dispersion, eco-solvent, UV ink or other inks using a printing plotter. The paint layer is varnished.

Thus, two stages of creating a decorative panel can be distinguished. The first is to obtain a solid base of the panel with a deep relief pattern, while the panel is processed from all sides with cover layers. The second is the decoration of the front surface of the panel with the provision of varnish protection of the pattern and surface texture.

This technology for creating decorative panels allows you to increase the speed of forming a relief pattern and get a high degree of similarity in the artistic reproduction of the picture.

The present invention can be industrially implemented on modern printing equipment and can be manufactured using modern printing equipment. Improving the strength properties of large-format panels is provided by the use of extruded polystyrene, primed on both sides, and the use of a highly elastic primer up to 2 mm thick on the back side. The non-destruction of the relief pattern is ensured by the creation of a solid film coating based on soil enamels with the addition of a structural paste that creates a fossilized layer.

Claims (11)

1. A method of manufacturing a decorative panel, which consists in the formation on the front surface of the plate of expanded polystyrene foam embossed image by removing the material of the plate in accordance with the image image, characterized in that the removal of the material of the plate on the front surface of the plate in accordance with the image image is carried out by chemical etching of the plate structure due to the metered application of the solvent composition on the surface of the floor plate to be removed by dissolution drills of deepening with a depth directly proportional to the volume of the dose of the solvent composition supplied to the area to be removed, while for the metered application of the solvent composition, a wide-format inkjet-type plotter is used to print a digital image file with two parallel print heads with one channel each or with one head with separate channels for immiscible supply of two types of solvent composition, differing in the rate of the process of chemical etching of foamed istirola. 2. The method according to p. 1, characterized in that the extruded polystyrene XPS or EPS polystyrene or autoclaved expanded polystyrene or autoclaved extruded polystyrene are used as foamed polystyrene. 3. The method according to p. 1, characterized in that after the complete complete chemical etching of the plate, which consists in additional exposure and drying of the plate after solvent treatment of the surface, the front surface of the plate is primed by spraying with soil-enamel coatings, which are a composition based on high-level ethylene-vinyl acetate dispersion with flame retardants. 4. The method according to p. 3, characterized in that over the relief pattern, fixed with primer-enamel, a colorful coating is applied with a large-format plotter based on water dispersible, latex pigment, solvent or sublimation ink. 5. The method according to p. 3, characterized in that the back of the plate is coated with a plaster composition, which is an elastic highly filled material based on styrene-acrylic dispersion. 6. The method according to p. 3, characterized in that an additional layer of structural paste is applied on top of the enamel coating, which is a water dispersion system based on a styrene-acrylic polymer containing a fractionated filler, which is dried before applying the paint coating. 7. The method according to p. 3, characterized in that in addition on top of the paint coating to apply it, 2-3 layers of matte elastic urethane or acrylic-urethane non-yellowing varnish are applied. 8. A decorative relief panel containing a base in the form of a plate of polymer material, on the front surface of which a relief convex image is made, characterized in that a plate of extruded polystyrene foam is used as a plate of polymer material, the back of which is coated with a flexible plaster composition based on water dispersion material, while the convex relief image is made by chemical etching and coated with a primer coating based on a water dispersion sion opaque enamel. 9. Decorative relief panel according to claim 8, characterized in that a layer of structural paste is applied on the front surface over the sprayed primer. 10. Decorative relief panel according to claim 8, characterized in that on top of the sprayed primer, a colorful layer is applied to the front surface, fixed with a UV-resistant varnish. 10. Decorative relief panel according to claim 8, characterized in that a layer of tinting soil-enamel is coated on the end surfaces of the plate, covered with a protective layer of varnish on top.

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