EP3415318A1 - Workpiece and method and device for forming a decorative workpiece - Google Patents

Abstract

The invention preferably relates to a method for producing a decorative workpiece having a structured surface with the following steps:
(A) feeding the workpiece to a coating station;
(B) full-scale application of a first liquid paint with a coarse structuring, in which a difference in thickness between thicker areas and thinner areas is at least 50 microns, in particular at least 100 microns;
(C) at least partially curing the applied first paint;
(E) applying a second liquid, at least partially transparent lacquer for producing a fine structuring in regions;
(F) curing of the second lacquer, wherein the difference in thickness in the region of the fine structuring on the second lacquer layer is less than 50 μm, in particular less than 30 μm.

Furthermore, an apparatus for carrying out the method and a workpiece produced by the method claimed.

Description

The present invention relates to a method and apparatus for producing a decorative surface and a workpiece.

A decorative surface for furniture, floor panels or wall panels is state of the art. Thereby, surfaces of workpieces, such as e.g. Chipboard or MDF boards, coated with a decorative printed paper or printed directly after applying a white primer and provided with a protective varnish. The surfaces are often replicas of real wood surfaces, stones or tiles. In doing so, both the image (decoration) of the wood surface and the tangible "haptic" structure (tangible pores and knotholes) are reproduced. However, the surfaces which are coated can also be rolled goods such as printed paper or printed plastic films (for the purposes of the present invention).

The optical reproduction of decorative images is produced according to the prior art using both analog printing methods and digital printing methods for a digital image original. To produce the haptic, tactile structure with a structure depth of usually 5 to 500 .mu.m, preferably 10 to 100 .mu.m, according to the prior art, an analogous method, such as embossing with structured embossing plates ("matrices"), is used. It is also known to produce such structures with digital methods, as shown in the DE 10 2015 110 236 A1 and DE 10 2009 044 802 A1 is shown.

The DE 10 2007 055 053 A1 discloses a method of processing a textured surface of a stamping die ("die"), wherein the gloss level of a first coating differs from that of a second coating, for example To simulate wood pores better. In subsequent use of such embossing tool for producing a finished product, such as a floor panel consisting of a HDF carrier plate and a printed, melamine-impregnated paper as a decorative layer, after pressing with the embossing tool at an optical viewing angle of less than 45 degrees Backlight, the wood pores decoratively printed in the paper also visible by gloss level differences of the hardened melamine surface, molded from the differently processed surface of the die. The production of such embossing tool is an expensive process. In addition, the embossing tools are usually used in short-cycle presses, where the change from one embossing tool to another takes a long time, at least about 15 - 30 min.

It is therefore the object of the present invention to produce an optically and haptically appealing surface with an optimized structuring. Furthermore, it should be possible to arrange optical and haptic properties spatially appropriate on a surface, so e.g. To be able to arrange a shiny pore spatially exactly over the optically printed wooden pore.

This object is achieved with features of the independent claims. Advantageous developments are the subject of the dependent claims.

In the method according to the invention, first a workpiece, for example a plate made of wood-based material, is fed to a coating station in order then to apply a first liquid lacquer with a coarse structure to a surface over its entire surface, with a thickness difference between thicker regions and thinner regions of at least 50 μm , in particular at least 100 .mu.m, for example between 150 .mu.m and 400 .mu.m.

Preferably, the first lacquer layer with coarse texturing is then at least partially cured.

Preferably, a decorative image can then be printed on this first coating layer by a multi-color printing, optionally the decorative image can be printed even before the first coat of paint, in which case the first coat is at least partially transparent, so that the decorative image remains visible. Alternatively, the workpiece may also be provided at the beginning with a decorative image.

In accordance with the invention, a second liquid, at least partially transparent, lacquer for producing a fine structuring in regions is now applied to the lacquer layer having a coarse structure and, for example, a visible decorative image.

Preferably, this second lacquer is then cured, wherein the difference in thickness in the region of the fine patterning on the second lacquer layer is less than 50 μm, in particular less than 30 μm, for example between 5 μm and 25 μm.

As a result, a visible decorative image is coated with at least two lacquer layers which produce a different structuring on the surface, a coarse structuring with larger differences in thickness and a fine structuring with smaller differences in thickness. As a result, the surface is optically and haptically less uniform.

Preferably, the degree of gloss in the region of the fine structuring is different by at least 10 gloss units than in the area of coarse texturing. The degree of gloss of the first lacquer layer may preferably deviate at least 20 gloss units from the gloss level of the second lacquer layer, the gloss units being measured according to DIN EN ISO 2813: 2015-02 at an angle of 60 °. As a result, an optically clearly perceivable gloss effect can be recognized. Adjusting the level of gloss can be varied in printing by droplet size and / or number of droplets per area, or by the use of matting agents.

The gloss measurement is carried out according to DIN EN ISO 2813: 2015-02. For gloss measurement, the amount of light that is a surface relative to a reference standard made of polished glass, measured. The unit of measure used is GU (Gloss Units). The amount of light reflected on the surface depends on the angle of incidence and the properties of the surface. In the gloss measurement, different angles of incidence (20 °, 60 ° and 85 °) can be used to detect the reflectance, preferably measured at the angle of incidence of 60 °. Alternatively, the average of measurements at the three angles of incidence can also be used. The reflectance compares the light energy emitted and received by a gloss meter in percent at a certain angle of incidence.

All surfaces or sections of surfaces that achieve less than 20 gloss units by measurement when using a glossmeter are defined as "dull", and any surfaces or sections of surfaces that achieve more than 60 gloss units are considered "glossy". designated. One of the two layers of paint can be dull and the other glossy.

For a fine adjustment of the degree of gloss, the droplets of the second lacquer layer having a droplet size of preferably less than 100 pL, in particular less than 10 pL, are sprayed on. Optionally, different degrees of gloss can also be set on the second lacquer layer so that gloss differences can also be present within the second lacquer layer.

The application of the first paint is preferably carried out with at least one pressure roller, which rolls on a surface of the workpiece. The pressure roller can be engraved, for example, and have an elastic material on an outer surface or an inner ring. Then the engraved roller can roll off directly on the surface of the workpiece. Alternatively, an application of the first lacquer can take place via at least two rollers, the first lacquer being transferred from a first roller to a second applicator roller, which then transfers the first lacquer to the surface of the workpiece.

The order of the second paint to produce the fine patterning is preferably carried out by at least one digital printhead. As a result, an optical region of a decorative image can be arranged to match its haptic properties spatially suitable. For example, can be modeled on the fine structuring a light wood grain, which is arranged congruent to a wood grain of the decorative image.

Alternatively or additionally, the application of the second paint can also be carried out after the application of an initially liquid paint, in which case paint droplets of the second paint layer are sprayed into the still liquid material to produce a fine structuring. The paint droplets may consist of the same material as the liquid layer. The application of a plurality of paint droplets in the still liquid paint layer with digital printheads takes place, for example, with paint droplets having a volume of less than 10 pL, which are sprayed onto the still liquid paint at a speed greater than 1 m / sec.

In an alternative embodiment, the paint droplets of a different material than the liquid paint, which undergo a chemical reaction with the liquid paint after impact, which changes the surface optically and / or haptically at the points. Instead of a chemical reaction, the liquid paint can also cause a physical reaction by impacting the liquid paint, whereby the sprayed-on droplets volatilize by evaporation within less than 5 minutes.

The inventive method is preferably used in plate-shaped workpieces, in particular of a wood material. But it is also possible to coat a roll product in an alternative embodiment instead of a plate-shaped workpiece. This may be, for example, decorative printed paper or a plastic film, for example, ABS, PP, PE or similar materials. The paper may have a basis weight between 20 g / m ² and 300 g / m ² . The plastic films can have a thickness of 0.05 mm to 5 mm. The roll goods may be, for example, edgebands which be fixed on end faces of plate-shaped workpieces in the furniture board production.

Figur 1

eine schematische Darstellung eines mit Hilfe des erfindungsgemäßen Verfahrens hergestellten, plattenförmigen Werkstückes im Querschnitt,

Figur 2

eine weitere schematische Darstellung eines mit Hilfe des erfindungsgemäßen Verfahrens hergestellten, plattenförmigen Werkstückes mit einer angedeuteten Holzpore in der Draufsicht,

Figur 3

eine Oberfläche eines bedruckten Werkstückes, und

Figur 4

eine Ansicht eines erfindungsgemäßen Werkstückes mit mehreren Schichten.

The invention will be explained in more detail with reference to embodiments in detail with reference to the accompanying figures. They show:

FIG. 1

a schematic representation of a plate-shaped workpiece produced by means of the method according to the invention, in cross-section,

FIG. 2

a further schematic representation of a plate-shaped workpiece produced by means of the method according to the invention with an indicated wooden pore in plan view,

FIG. 3

a surface of a printed workpiece, and

FIG. 4

a view of a workpiece according to the invention with several layers.

In FIG. 1 a plate-shaped workpiece 1.0 is shown, on which an optional first base layer 1.1 is applied to a surface. In addition, optional on the workpiece 1.0 even before the application of the first base layer 1.1 a decorative image printed, such as a wood reproduction or a tile display. In an alternative embodiment, even after the application of the first base layer 1.1 or after the application of a structured second base layer 1.2, a decorative image can be printed, for example using a 4-color digital printer. On the first base layer 1.1. a second liquid base layer 1.2 is applied. This second base layer 1.2 has been structured by digitally sprayed droplets 1.3, so that the surface is no longer flat, but has a structure and forms a first lacquer layer with a coarse structuring. Subsequently, a further lacquer layer 1.4 is applied, which has a first degree of gloss. On the first coat of paint 1.4 is then a second coat of paint 1.5 via digital printheads applied to produce a fine structuring, wherein the second lacquer layer 1.5, the surface of the first lacquer layer 1.4 only partially covered. The lacquer layers 1.4 and 1.5 are cured successively or jointly, for example via UV radiation. The second lacquer layer 1.5 after hardening has a different degree of gloss than the first lacquer layer.

Instead of structuring the second base layer 1.2 by means of digitally sprayed-on droplets, it is also possible to structure a base layer by other methods, for example using only area-wise application or embossing matrices. It is also possible to apply the decor image on a structured surface instead of on a flat surface.

In FIG. 2 is a plan view of the plate-shaped workpiece 1.0 of FIG. 1 and it can be seen that the decorative image includes a wooden pore 2.5 and wooded areas 2.4. The different areas of the wooden pore 2.5 and the wood grain areas 2.4 can also have a different degree of gloss due to the second paint view 1.5, wherein the decor areas of the image and the different gloss areas are preferably congruent due to the paint application.

In a further embodiment, on a support plate of a wood material or a plate of another material having a thickness of at least 4 mm, preferably 8 to 16 mm and outer dimensions of at least 200 mm wide and at least 400 mm in length, first with a UV-curing coated white basecoat, for example, in an amount of about 20 g / qm. This white basecoat is then cured under UV irradiation.

Subsequently, the carrier plate is fed to a digital printing device in which a printed image, such as a replica of small tiles as a mosaic, a wood decor or other pattern, is applied with a 4-color printing as CMYK.

In FIG. 3 For example, for a printed image, a pattern with two differently colored mosaic tiles printed on a plate-shaped workpiece 3.0 is shown, with bright mosaic tiles 3.1 and darker mosaic tiles 3.2 being provided. In an alternative embodiment, a variety of other colors of tiles or mosaics with pictorial representations may also be used.

Subsequently, a thin base coat layer of 5-15 g / qm of a likewise UV-curing lacquer is applied to the so-printed workpiece 3.0 and (partially) cured with UV light. In an alternative embodiment, this basecoat layer can also be completely eliminated or replaced by a solvent-based lacquer or an aqueous acrylate lacquer, which is then physically dried.

On the first base coat layer or alternatively directly on the printed image, a base coat layer 1.2 is then applied as a radiation-curing lacquer layer with coarse texturing, preferably based on acrylate, in a layer thickness of 100-500 μm. The basecoat layer 1.2 can be applied by digital printheads or by pressure rollers or other methods. Directly after the application of this second basecoat layer 1.2, a second, transparent resist layer 1.3 is optionally printed before curing in the still liquid layer by means of a digital print template with digital printheads. When applying this lacquer layer 1.3, the droplet size can vary between 1 pL and 100 pL. The digital artwork used is that which was also used to print the tile mosaic described above. This artwork is previously electronically modified so that only in the spaces 3.3 of the mosaic tiles 3.1 and 3.2 is printed. Subsequently, the radiation-curing basecoat 1.2 is cured together with the resist layer 1.3 with a UV lamp. In an alternative embodiment, the curing can also be effected by means of electron radiation.

The result is a printed with a tile mosaic support plate in which the interstices 3.3 are deepened as joints between the mosaic tiles 3.1 and 3.2 by 10 - 60 microns.

Subsequently, the degree of gloss of at least parts of the entire surface is adjusted to the desired value by the at least partial application of a second lacquer layer 1.4 with subsequent drying, the degree of gloss of the first lacquer layer 1.3 deviating from the gloss level of the second lacquer layer.

In an alternative embodiment, the additional application of a third lacquer layer 1.5 can also be carried out before or after curing of the second lacquer layer 1.4, wherein the third lacquer layer 1.5 likewise consists of a multiplicity of droplets having a size of 3-100 .mu.l being dispensed onto the surface. With this third lacquer layer, both the degree of gloss in partial areas can be changed again and the surface texture depth of the not yet cured lacquer layer 1.4 can be influenced.

The lacquer layers 1.4 and 1.5 can also be completely eliminated if the degree of gloss is also changed by applying the first lacquer layer 1.3 at the same time as the second base lacquer layer 1.2 applied for structuring.

The surface of the mosaic tiles 3.1 and 3.2 now has a value of, for example, 60-90 gloss units, while the gloss level at the interstices 3.3 is, for example, only 20 to 40 gloss units.

Optionally, the gloss level at the interstices 3.3 can also be lowered by a further lacquer layer, which is finally printed by a further digital printing device with a transparent, UV-curing lacquer in the lowered spaces. Then more than just two layers of paint are applied to adjust the gloss level.

To print a rather duller lacquer layer, droplet sizes of 3-6 pL are used, which are cured to within 0.5 - 2 sec. After hitting the surface by UV-LED radiation so far that they can no longer flow. This results in a surface structure in these areas, which is the incident light no longer reflected straight. The gloss level is thus lowered to values of 30 gloss units and less.

In the method according to the invention, the second lacquer layer may optionally have a higher or lower degree of gloss than the first lacquer layer. The setting of the gloss level can be carried out, for example, by the following methods:

Version 1:

Matte areas through the first lacquer layer consist of previously (analog or digital) applied matt lacquer, for example, with matting agents or by an excimer matting. Glossy areas of the second lacquer layer consist of lacquer applied by digital print heads, which is formed from a large number of individual droplets, resulting in a sectionally very smooth surface and thus a high degree of gloss. The droplets have a size of at least 6 pL, and the curing takes place only after a course of at least 1 sec, preferably after more than 5 sec.

Variant 2:

The glossy areas of the first lacquer layer consist of glossy lacquer previously applied (analog or digital), matt areas of the second lacquer layer consist of digitally applied lacquer of a multiplicity of smallest droplets with a droplet size smaller than 8 pL, preferably smaller than 3 pL, inside less than 3 seconds after application, preferably less than 1 second after application, at least partially cured.

Curing in both variants is preferably carried out by a UV-LED lamp, which is arranged in the direction of passage within less than 100 mm after the digital print heads, which apply the plurality of droplets to the surface.

For the preparation of a matt lacquer coating matting agents may be added to the paint, for example PE waxes or silicic acids. The proportion of matting agents in the paint can be between 2% to 6%, in particular 3% to 5% (percent by weight).

The different embodiments of the FIGS. 1 and 3 can be combined with each other in terms of the order and the structuring of a layer. The number of layers on the workpiece can also be freely selected, depending on which surface structure is to be produced by the method.

In alternative embodiments of the process according to the invention, the lacquers used can be replaced by aqueous or solvent-containing lacquers instead of acrylate-containing, UV-curing lacquers. In this case, the steps for UV drying by means of UV LED or UV arc lamp are replaced by a physical drying by means of hot air or IR radiators or a combination of both.

In FIG. 4 is another embodiment of a coated plate-shaped workpiece 4.1 shown.

A workpiece 4.1, for example a plate of a wood material with a width of 200 to 2000 mm and a length between 500 and 3000 mm and a thickness between 8 mm and 18 mm is fed to a coating station. The workpiece 4.1 is already provided with a decorative image, such as a wood reproduction, e.g. an oak decor, printed.

Optionally, a smooth intermediate lacquer layer 4.2, such as a primer or primer, is applied in the coating station. Subsequently, by means of a laser-engraved rubber roller, a radiation-curing, transparent first lacquer layer 4.3 of 100 to 200 g / m ^{2 is} applied to the workpiece 4.1, whereby the structure of a coarse wooden pore on the surface is created by the engraving in the rubber roller. The height differences between the "pores" and the elevations, ie the differences in thickness of the first lacquer layer 4.3, be between 150 microns and 300 microns (microns) and form a coarse structure. Subsequently, the applied paint is cured with a UV lamp. In an alternative embodiment, after curing, a decorative image 4.4 can be printed with the aid of a digital printer with a 4-color print on the surface structured in this way if no image was still on the workpiece prior to the coating. In this case, the lacquer layer 4.3 may also be colored, for example white.

On the now cured lacquer layer 4.3 with or without the colored decor pressure layer 4.4, a further liquid lacquer layer 4.5 is applied in a further coating station by means of a smooth rubber roller. Subsequently, the workpiece is fed to a digital printing station 4.6, where a plurality of droplets 4.7 is applied to the still liquid paint layer 4.5 after a digital image template, which provides the still liquid paint layer 4.5 with a fine structuring. Here, the digital image template on the previously printed decor image, such as rustic oak, so matched that the visually recognizable image components, such as a knothole, or a black printed crack in the wood, exactly in line with the structure printed in the liquid pore structure. This allows the end user to feel the optically printed knothole as well. At the same time, above all else, there is the very deep and coarse structure of varnish layer 4.3, which emphasizes the rustic character of the oak reproduction.

Finally, the description of preferred aspects of the invention will be given.

1. A Zuführung des Werkstückes zu einer Beschichtungsstation;
2. B vollflächiger Auftrag eines ersten flüssigen Lackes mit einer groben Strukturierung, bei der ein Dickenunterschied zwischen dickeren Bereichen und dünneren Bereichen mindestens 50 µm, insbesondere mindestens 100 µm beträgt;
3. C mindestens teilweise Aushärtung des aufgetragenen ersten Lackes;
4. D Aufbringen eines Dekorbildes durch mehrfarbigen Druck vor Schritt B oder nach Schritt C;
5. E Aufbringen eines zweiten flüssigen, zumindest teilweise transparenten Lackes zum bereichsweise Erzeugen einer feinen Strukturierung;
6. F Aushärten des zweiten Lackes, wobei der Dickenunterschied im Bereich der feinen Strukturierung an der zweiten Lackschicht kleiner 50 µm, insbesondere kleiner 30 µm ist.

A first aspect of the invention is a method for producing a decorative workpiece having a structured surface, comprising the following steps:

1. A supply of the workpiece to a coating station;
2. B full-surface application of a first liquid paint having a coarse structuring, in which a difference in thickness between thicker areas and thinner areas is at least 50 μm, in particular at least 100 μm;
3. C at least partially curing the applied first paint;
4. D applying a decorative image by multicolored printing before step B or after step C;
5. E application of a second liquid, at least partially transparent lacquer for partially producing a fine structuring;
6. F hardening of the second coating, wherein the difference in thickness in the region of the fine patterning on the second coating layer is less than 50 μm, in particular less than 30 μm.

A second aspect of the method according to the preceding paragraph is that the degree of gloss in the area of the fine structuring is different by at least 10 gloss units than in the coarse patterning.

A third aspect of the method according to one of the two preceding paragraphs is that the application of the first paint is carried out with at least one pressure roller, which rolls on a surface of the workpiece.

A fourth aspect of the method according to any one of the preceding three paragraphs is that the application of the second lacquer is performed by at least one digital printhead.

A fifth aspect of the method according to one of the four preceding paragraphs is that the material for the first and the second varnish is identical.

A sixth aspect of the method according to one of the five preceding paragraphs is that for producing the second lacquer layer, first a liquid lacquer is applied and then lacquer droplets of the second lacquer layer are sprayed into the still liquid material to produce a fine structuring.

A seventh aspect of the method according to the preceding paragraph is that the paint droplets consist of the same material as the liquid layer.

An eighth aspect of the method according to either of the preceding two paragraphs is to apply a plurality of paint droplets to the still liquid paint layer with digital printheads, each paint droplet having a volume of less than 10 pL, and the speed of each paint droplet upon impact on the still liquid paint layer is greater than 1 m / sec.

A ninth aspect of the method according to the sixth aspect is that the paint droplets are made of a different material than the liquid paint and, after impact, undergo a chemical reaction with the liquid paint, which visually and / or haptically changes the surface at the sites.

A tenth aspect of the method according to the sixth aspect is that the paint droplets are made of a different material than the liquid paint and after a physical reaction by the impact on the liquid paint volatilize by evaporation in less than 5 minutes.

An eleventh aspect of the method according to one of the preceding aspects is that at least one application of an intermediate coating takes place between the workpiece and the first lacquer layer.

• einer Beschichtungsstation A und einer Einrichtung zur Zuführung des Werkstückes zu der Beschichtungsstation;
• einer ersten Druckstation B zum vollflächigen Auftrag eines ersten flüssigen Lackes auf das Werkstück mit einer groben Strukturierung, bei der ein Dickenunterschied zwischen dickeren Bereichen und dünneren Bereichen mindestens 50 µm, insbesondere mindestens 100 µm beträgt;
• einer Station C zum zumindest teilweisen Aushärten des ersten Lackes;
• einer Station D zum Aufbringen eines zweiten flüssigen, zumindest teilweise transparenten Lackes zum bereichsweisen Erzeugen einer feinen Strukturierung, und einer Station E zum Aushärten des zweiten Lackes, wobei
• der Dickenunterschied im Bereich der feinen Strukturierung an der zweiten Lackschicht kleiner 50 µm, insbesondere kleiner 30 µm ist.

Another aspect of the invention is an apparatus for carrying out the method described above with:

• a coating station A and means for feeding the workpiece to the coating station;
• a first printing station B for the full-surface application of a first liquid paint on the workpiece with a coarse structure in which a difference in thickness between thicker areas and thinner areas is at least 50 microns, in particular at least 100 microns;
• a station C for at least partially curing the first paint;
• a station D for applying a second liquid, at least partially transparent lacquer for producing a fine structuring in regions, and a station E for curing the second paint, wherein
• the difference in thickness in the region of the fine structuring on the second lacquer layer is less than 50 μm, in particular less than 30 μm.

Another aspect of the invention is a workpiece, in particular a plate-shaped workpiece made of a wood workpiece, a carrier material on which at least one decorative image is printed, and at least one lacquer layer with a coarse structure, wherein a thickness difference between thicker areas and thinner areas at least 50 microns , in particular at least 100 microns, and at least a second lacquer layer of an at least partially transparent material having a fine patterning, wherein the thickness difference is less than 50 microns, in particular less than 30 microns.

Another aspect of the workpiece is that the first lacquer layer has a layer thickness between 100 to 500 microns.

A third aspect of the workpiece according to one of the two preceding paragraphs is that the second lacquer layer has a layer thickness between 10 and 100 μm.

LIST OF REFERENCE NUMBERS

1.0

workpiece

1.1

first base layer

1.2

second base layer

1.3

digitally sprayed droplets

1.4

first varnish layer

1.5

second lacquer layer

2.4

grained wood areas

2.5

wood pore

3.0

workpiece

3.1

bright mosaic tiles

3.2

darker mosaic tiles

3.3

interspaces

4.1

workpiece

4.2

Intermediate lacquer layer, e.g. Primer

4.3

analogously applied textured paint

4.4

digital decor print

4.5

liquid paint layer

4.6

digital printing station

4.7

droplet

Claims (15)

Method for producing a decorative workpiece having a structured surface, comprising the following steps: (B) full-scale application of a first liquid paint with a coarse structuring, in which a difference in thickness between thicker areas and thinner areas is at least 50 microns, in particular at least 100 microns; (E) applying a second liquid, at least partially transparent lacquer for producing a fine structuring in regions. Method according to claim 1, characterized in that
the degree of gloss in the area of the fine structuring is different by at least 10 gloss units than in the coarse structuring. A method according to claim 1 or 2, characterized in that
the application of the first lacquer is carried out with at least one pressure roller, which rolls on a surface of the workpiece, and / or that
a step (A) is provided, in which a supply of the workpiece to a coating station is performed, and / or
a step (C) is provided, in which an at least partial curing of the applied first lacquer is carried out, and / or that
a step (F) is provided, in which a curing of the second resist is carried out, wherein the difference in thickness in the region of the fine structuring on the second lacquer layer is less than 50 μm, in particular less than 30 μm. Method according to one of the preceding claims, characterized in that
the second paint is applied by at least one digital printhead. Method according to one of the preceding claims, characterized in that
the material for the first and the second varnish is identical. Method according to one of the preceding claims, characterized in that
to produce the second lacquer layer, first a liquid lacquer is applied and then lacquer droplets of the second lacquer layer are sprayed into the still liquid material to produce a fine structuring. A method according to claim 6, characterized in that the paint droplets consist of the same material as the liquid layer. A method according to claim 6 or 7, characterized in that
the application of a plurality of paint droplets in the still liquid paint layer is done with digital printheads, each paint droplet has a volume of less than 10 pL, and the speed of each paint droplet when hitting the still liquid paint layer is greater than 1 m / sec. A method according to claim 6, characterized in that
the paint droplets are made of a different material than the liquid paint and, after impact, undergo a chemical reaction with the liquid paint, which visually and / or haptically changes the surface at the sites. A method according to claim 6 or 9, characterized in that
The paint droplets of a different material than the liquid paint and volatilize after a physical reaction by the impact on the liquid paint within less than 5 minutes by evaporation. Method according to one of the preceding claims, characterized in that
at least one application of an intermediate coating takes place between the workpiece and the first lacquer layer, and / or
a further step (D) is provided in which an application of a decorative image by a multicolor printing before step (B) or after step (C) is performed. Apparatus for carrying out the method according to one of the preceding claims, comprising: (B) a first coating station for the full-surface application of a first liquid paint on the workpiece with a rough structuring, in which a difference in thickness between thicker areas and thinner areas is at least 50 microns, in particular at least 100 microns; (D) a station for applying a second liquid, at least partially transparent lacquer for producing a fine structuring in regions. The device of claim 12, further comprising: an application device which is adapted to apply a decorative image on the workpiece and / or one of the applied paint layers, wherein the application device has in particular a multicolor digital printer, and / or a coating station and / or a device for feeding the workpiece to the coating station, and / or a station for at least partial curing of the first paint, and / or a station for curing the second lacquer, wherein the difference in thickness in the region of the fine patterning on the second lacquer layer is less than 50 μm, in particular less than 30 μm. Workpiece, in particular plate-shaped workpiece
a wood workpiece, a carrier material on which at least one decorative image is printed, and at least one lacquer layer with a coarse structuring, in which a difference in thickness between thicker areas and thinner areas at least 50 .mu.m, in particular at least 100 .mu.m, and at least one second lacquer layer of a at least partially transparent material with a fine Structuring in which the thickness difference is less than 50 μm, in particular less than 30 μm. Workpiece according to claim 14, characterized in that
the first lacquer layer has a layer thickness between 100 to 500 μm, and / or that
the second lacquer layer has a layer thickness between 10 and 100 μm.

Images