DE102005014945A1 - Wall cladding made of glass - Google Patents

Abstract

The present invention relates to a glass wall cladding, in particular in the form of tiles, intended to clad walls of a living space, such as walls, floors or ceilings, with a glass substrate provided with a varnish layer on the side to be applied to the wall, which has a low water permeability so that said wall covering can be applied to the walls by means of ordinary mortar adhesives or cement adhesives. The low water permeability of the paint layer protects the glass surface and the adhesion of the paint itself against corrosive attacks by the stirring water of the mortar.

Description

The The present invention relates to a wall panel Glass, especially in the form of tiles, which is intended to be a wall Living space, such as walls, floors or to disguise blankets.

she refers in more detail to a panel that goes through the walls the usual Attached techniques for attaching traditional ceramic tiles can be.

Glass wall coverings in the form of plates or tiles are mainly because of their aesthetic Properties and the simplicity of their maintenance. The complete Freedom of the glass from pores brings a very easy cleaning with, while the light transmission and reflection properties of the glass very appreciated cause optical effects, such as depth effects, when Decors on the back the plates are attached.

It be made clear that with "back" here always the the facing wall to be clad or adhesively attached thereto area the tile is meant while the front is always the exposed surface facing the room.

The commercial development of glass wall coverings However, for many years it has been hindered by the fact that Do not use them normally by the tiler used ceramic tiles, such as cement adhesive, also called "mortar adhesive", to the Walls attached can be. These very cheap adhesives are mixtures of cement and sand, which you call so-called stirring water admits to form a paste, which is to be clad on the Walls, and which then solidifies due to hydration reactions of the cement. Now the cement is with the usual glass like soda lime silicate glasses incompatible, because its basic nature causes corrosive reactions of the glass showing off any adhesion of the glass on the cement prevent and the aesthetics of the glass plate strong affect.

consequently be for Glass panels different alternative fasteners used. You can be mechanical, but then require the manufacture and use of expensive metal workpieces (Screws, rivets, bolts). The mechanical discontinuous Assemblies also have the disadvantage that they lead to internal voltage peaks and an uneven distribution lead to stiffness, the disadvantageous for one good mechanical resistance of the overall arrangement. They are also visible, something aesthetic Aspects undesirable can.

Glass wall coverings can also with the help of adhesives, for example synthetic resins, be attached. Given the high cost of the resins used these are rarely applied to the entire surface to be bonded, resulting in a poor distribution of shear loads, and consequently a low quality bond. One also has aging reactions the resins go out their adhesive Properties will decrease.

Solutions, which allow to use cement glue are more recent have been proposed, but are not free from disadvantages.

So the patent recommends US Pat. No. 6,015,622 the use of a very specific laying method which comprises, in particular, mixing the mortar with an aqueous dispersion of a polyacrylic acid derivative. The patent DE 100 34 981 C2 in turn claims a glass tile which is already covered with a cement of special composition obtained by means of an aqueous solution of a styrene-butadiene type resin. The patent application EP-A-722 027 also discloses the use of a special mortar comprising 50% of an excipient formed from an aqueous dispersion diluted with a synthetic resin. In these three cases, the use of a mortar of special composition is essential, and the use of mortars currently used by tilers in ceramic tiles does not meet the requirements.

It also appears that the smooth glass surface is detrimental to good adhesion of the glass tile to masonry walls. So the patent recommends FR 599 239 since 1925 the coating of tiles with a layer of paste or varnish derived from synthetic resins, fixed on fragments of glass, metal, sand, gravel, marble or any other inert material. However, this method requires the use of finely ground, so with an expensive process produce fragments.

Out Glass wall coverings are also known in the prior art. on which a paint layer with decorative function applied to the side which comes in contact with the wall to be covered. But the used paint type is also incompatible with the cement adhesives, and such products need on the walls be attached by other means, for. B. using adhesive resins.

The The present invention aims to overcome the aforementioned disadvantages remedy by using a glass-based wallcovering with a rearward lacquer layer suggests especially in the form of tiles, which is intended to be a wall Housing to disguise, and on the said walls by means of the usual for laying ceramic tiles, especially by using ordinary ones Cement mortars, can be attached.

The Inventors have discovered that the most important physico-chemical Feature in this regard, the permeability or permeability of the paint for Water is. If not this size is adjusted (usually if it is too high considering the used mortar glue) diffuses the stirring water, which became basic through the hydration reaction of the cement the lacquer layer and then can chemically react with the glass surface and with it any adhesion impossible make (especially the adhesion between glass and varnish), whereby also the resemblance of the Glass Panel damaged becomes.

In In its broadest sense, the panel according to the invention thus comprises a glass substrate, the on its surface to be bonded coated with a lacquer-based layer, characterized that said paint as a protective layer against corrosive attacks such a low permeability to water, that the said disguise on the walls using ordinary, mixed with water Mortar Glues or Cement adhesives can be applied without causing damage to the Paint and / or covered by this glass surface must be feared.

Of the maximum value of permeability of the paint allowed is to achieve a permanent bond depends entirely obviously from the type of mortar glue used.

The permeability to water is defined as the product of the amount of water vapor (in cm ³ ) that diffuses through a material, with the thickness of the material (in cm), based on the product of the exposed surface (in cm ² ) with the exposure time (in seconds) and with the pressure drop (in Pascals) defined between the two faces of the material. It can be measured, for example, by measuring the increase in mass of a paint film after exposure to an air-conditioned furnace chamber whose humidity level is controlled.

These Size depends on the case a polymer primarily of the chemical nature of the polymer then from its morphology, which, for example, on the degree of crosslinking depends (determined by, for example, the degree of crosslinking agent and / or the crosslinking temperature), the degree of crystallization, of a possible alignment of the molecules. It also depends on the nature and if necessary the amount of mineral supplements.

The varnish of the cladding according to the invention has a permeability to water at 25 ° C. of preferably less than 10 ^-6 , less than 5 × 10 ^-7 , and in particular less than 10 ^-7 , expressed in cm ³ · cm · cm ^-2 · s ^-1 · Pa ^-1 . In order to ensure perfect adhesion and mechanical durability, especially shear strength, over long periods of time, it is even preferable that the paint has a permeability to water at 25 ° C of less than 10 ^-8 , 10 ^-9 , and even 10 ^-10 cm ³ · cm · cm ^-2 · s ^-1 · Pa ^-1 . In some cases, since the liners according to the invention are to be used in places where the environment is moist (for example in bathrooms), it is even more preferable for the permeability to water of the lacquer covering an area of the lining according to the invention to be lower than 10 ^-11 , 10 ^-12 , and even 10 ^-13 cm ³ · cm · cm ^-2 · s ^-1 · Pa ^-1 .

Of the Lacquer of the lining according to the invention contains So preferably as a binder, a synthetic resin, preferably before application in liquid Form is present and tuned to the oven drying. It was observed that paints that are at high temperature (above 50 ° C, or even at 100 ° C) dried binders, quite generally a lower one permeability exhibited as binders which dried in air at ambient temperature were probably due to the ongoing crosslinking reactions, for example, by polycondensation, which collide and lead to the emergence of three-dimensional networks of greater density.

The Bindemitel is advantageously a polyurethane resin that is manufactured is obtained by crosslinking hydroxylated resins, in particular polyester or polyether resins, or preferably acrylic resins (or Polyacrylates) which have high resistance to ultraviolet rays by an isocyanate or a polyisocyanate. In this In the case, the hydroxylated acrylic resin preferably becomes the polymerization an acrylic styrene won while the isocyanate (or polyisocyanate) advantageously no grouping of the aromatic type. This special combination makes it possible in particular to obtain low permeabilities, good mechanical properties (for example with regard to the Scratch resistance), and a high resistance to ultraviolet radiation.

Binder of facing according to The invention may also contain or be prepared on the basis of alkyd resins obtained by chemical reaction between at least one polyol, at least one polyacid and at least one fatty acid or an oil. These alkyds are preferably low in oil, ie the weight fraction of oil or fatty acid in the resin is preferably less than or equal to 40%. The polyols may be, for example, compounds of glycerol or of pentaerythritol. The polyacids may be prepared based on phthalic anhydrides. The oils may be dry oils (such as linseed oil, wood oil, china oil), semi-dry oils (such as soybean oil, tall oil, safflower oil or dehydrated castor oil) or non-dry oils (copra oil, castor oil). In order to improve their water resistance, the alkyd binders may also be modified by monomers such as styrene, vinyl toluene or acrylates or by phenolic resins or epoxy resins. Urea-alkyd resins which crosslink under the action of heat are particularly advantageous binders for the lacquer of the lining according to the invention. The urea crosslinker is preferably a urea-formaldehyde or melamine-formaldehyde resin which provides good water resistance, especially when added to the dry alkyd binder at a ratio of 20 to 30 mass%.

Of the Varnish may also contain a binder based on a thermosetting acrylic resin, for example, by crosslinking a carboxylated acrylic resin by an epoxy resin, formophenol resin, or melamine-formaldehyde resin, an acrylic resin with carboxamide function by an epoxy or Alkyd binder, or an acrylic resin with epoxy function by acids or polyamines are obtained.

The inventive panel is advantageously provided with a primer layer (also called "adhesion primer"), which is between the glass and the varnish lie and whose function is the adhesion between to improve the glass and the paint. This layer is preferred Made on the basis of silanes, which allow it to be moisturized conditional risks of adhesive detachment too avoid. Fabrics for improving adhesion with the glass, such as silanes, can also be dispersed in the paint.

The varnish advantageously contains pigments, mineral and / or organic, preferably mineral, in order to contribute the desired aesthetic properties. These pigments are preferably of a to ultraviolet radiation and moisture from resistant type. Under the conditions used in the present invention pigments can be found, for example, titanium or zirconium oxides, which optionally are doped with ions of transition elements, or zirconium mixed oxide (ZrSiO ₄ ). The pigments are preferably free of heavy metals such as cadmium or lead.

Of the Lacquer can also contain mineral additives, which are intended to convey its physicochemical parameters, z. As its viscosity, too optimize. The total content of mineral substances (pigments and surcharges) of the paint is preferably, in terms of mass percent, between 40 and 70%, or between 50 and 60%.

Of the Lacquer of the lining according to the invention can be applied by any method known to those skilled in the art, like curtain, pneumatic atomization, Screen printing or "roll coating." The screen printing process has the advantage that you can coat the substrate only on part surfaces. The roll coating process consists of the substrate to be coated to pass between two rollers, one of which (generally the upper roller) coated with lacquer is. For cost reasons the curtain method is preferred in which a paint flow on generates a line which is substantially perpendicular to the transport direction of the Glass substrate is what makes it possible will, the entire surface to coat the said substrates. The mass flow of the paint and the flow rate of the substrate are controlled so a coating of the desired thickness, preferably 100 to 200 μm when wet, is achieved. The varnish-coated substrate then becomes a heat treatment which allows to cure the varnish, more precisely, the solvent to remove and the reactions of the polymerization and / or the To run crosslinking of the resins used as binders. The temperature used is preferably between 50 and 250 ° C, in particular between 100 and 200 ° C, to give the paint a degree of crosslinking that is suitable its water permeability to reduce. The thickness of the lacquer layer after curing is preferably between 20 and 100 μm, in particular between 40 and 70 μm, to the desired opacity to reach.

The glass substrate used may consist of any type of flat glass (possibly bent according to the methods known to those skilled in the art when it comes to cladding curved surfaces). It may be monolithic, ie single-pane glass, which can be produced by the process known as "float", which makes it possible to produce a perfectly flat and smooth sheet, or by drawing or rolling Case, and when the rolling rolls have relief surfaces, the glass sheet may be printed and have patterns on at least one of its surfaces, preferably the paint backing or back surface (as in, for example, the patent document EP 493 202 of fenbart).

The Glass can be clear or have different tints, like blue, bronzes, green, gray or reddish. The light transmission of the glass can be between 10 and 92 at a Thickness of 4 mm chosen become. For a particularly preferred embodiment in the case where the paint knows or ivory-colored, the glass substrate is a disc of extra-white glass used, d. H. its iron oxide content less than 250 ppm, preferably lower or equal to 200 ppm, or even 150 ppm, and its light transmission under illumination D65 higher is 89%, especially 90% at a thickness of 4 mm. One has found that the optical properties of such a glass it allowed an excellent appearance of the white or To achieve ivory color of the varnish, while the greenish residual dyeing of the usual clear glasses, their iron oxide content in the order of magnitude of 1000 ppm, is particularly emphasized.

The Thickness of the glass substrate is preferably between 2 and 19 mm, preferably between 4 and 10 mm, more particularly between 5 and 9 mm.

These Glass pane can be frosted on at least one of its surfaces (preferably on the front) by various Mattierungsverfahren, z. As matting with hydrofluoric acid or by sandblasting. This matting may be on the whole of the area side or only in special Areas are created, creating matte patterns with slight erosion become. This latter embodiment can be executed by selecting the areas that should not be engraved through an acid-resistant coating protects which is then removed. The matte view can also be applied by applying of an organic or mineral enamel.

A reflective layer, preferably one by those skilled in the art silver coating applied to known silvering processes can also between the glass substrate (possibly with silane-based adhesion promoters provided) and the paint are provided, this latter the Fulfills the function of a seal, which protects the silver layer against corrosion.

One Decor of one or more colors, by screen printing or Ink jet method is generated, is advantageously between the glass substrate (which may be provided with silane-based adhesion promoters is applied) and the paint, and / or on the front. You can z. B. the application of decors on the front and on the back combine.

A particularly interesting embodiment relates to a wall covering according to the invention, ie the back covered with a varnish, this back then with mechanical Means is scribed (in particular by grinding with abrasives with more or less complex profiles), so for example Lines of 1 to 30 mm wide and produced with 0.5 to 3 mm depth be, so removing the paint layer over its entire thickness has been. A decorative layer, preferably a silver layer, through The classic silver plating process has been preserved on the back side be applied. In this case, where the incisions are along Straight lines with regular intervals and can be generated along two mutually perpendicular directions one from a single, on the wall mounted glass plate the visual impression of a plurality of tiles separated by joints generate, at the same time the advantage of a front surface with smooth surface is maintained, which avoids the problem of contamination of the joints and the cleaning considerably simplified. This embodiment Incidentally, the invention allows to reduce the laying time of the tiles by the grouting steps be saved.

The Glass substrate can also be coated with functional layers such as anti-reflective coating systems, self-cleaning coatings functionality (Containing, for example, titanium oxide, preferably as anatase or rutile crystallized, which is also dirt-repellent, antibacterial, Have fogging and condensation preventing properties), or with hydrophobic layers. Slip-resistant coatings, especially in enamel form, especially in the case of floor coverings estimated. Abrasion-inhibiting or scratch-resistant layers can also be the substrate according to the invention clothe.

Out For safety, or special features contribute, the glass substrate can advantageously also a Laminated glass pane formed by an assembly of several glasses is, in particular of two glass panes, which consists of a film Plastic such. As polyvinyl butyral (PVB) are separated. electrical conductive and consequently layers which can be heated by the Joule effect can one of the surfaces of the network, which allows, for example, heated floors and / or walls manufacture. The plastic film may also contain liquid crystals which are alignable under the action of an electric field, wherein they make a transition from a translucent or opaque condition in a transparent state, where they can expose, for example, a special decor, the on the back side is arranged.

The Glass substrate may also be a light panel. This will be for example in the form of a double pane (insulating glass pane) with a gas-tight Spacer frame realized whose disc space with a Gas, in particular filled with a noble gas such as xenon or neon, the under electric field effect can show luminous discharges, as described, for example, in patent application WO 2004/015739, which is given here as a reference example, or a composite or multiple pane containing light emitting diodes electrically via thin conductive layers or by from a paste on z. B. silver-based screen printed strips or wires be fed.

If the glass cladding is in tile form, then the tiles are preferably rectangular with side dimensions that are multiples of 15 cm, assuming a gap of a given width (e.g., 3 mm). It is thus possible to form tiles of 15 × 15 cm ² , 15 × 30 cm ² , 15 × 45 cm ² , 30 × 45 cm ² , 30 × 30 cm ² , 45 × 45 cm ^2, etc. The design of a joint with a given uniform width makes it possible to combine tiles of different sizes on one and the same wall, and yet maintain an alignment of the joints, which is particularly esteemed from an aesthetic point of view.

An advantage of the glass tile in relation to the traditional ceramic tiles lies precisely in the modularity of the possible sizes and in the option to easily produce plates of large dimensions. The final dimension is made by simply cutting off large glass panes, the area of which can exceed 10 m ² , while the dimensions of ceramic tiles can only be changed by making and using molds of different sizes. Moreover, it is extremely difficult to produce ceramic pieces of large dimensions, for example with a surface exceeding 1 m ² .

The Shape of the edges the tiles according to the invention has been specially optimized to attach the joint sealants to improve and to avoid visible execution errors. The Inventors have noticed that certain edge cuts, in particular of the type "rounded Fugue ", an attachment of joint sealants which evenly covered the entire edge of the tile, incidentally the transparency of the glass possible errors of the execution through the window. The tiles of the invention Therefore, preferably have chamfered edges, which may be ground and / or be polished, and characterized in that the chamfer width is larger on the front. The backside is preferably affected very little by the edge grinding, such that the lacquer layer practically covers the entire surface of the tile covered. Specifically, the width affected by the edge grinding is on the back side advantageously less than or equal to 0.5 mm, or even smaller or equal to 0.3 mm. In general, the painted surface (back) preferably greater than the front after the edge grinding.

The Cutting the glass tiles according to the invention is particularly simple, and it does not require special tools over the for cutting ceramic tiles, in particular stoneware tiles, or tools needed to trim marble or granite. Also The sanding of the edges after cutting can be done using a Grindstones are made according to the procedures given to the professionals for laying of ceramic tiles are well known.

• – die Genauigkeit des Zuschnitts ist im Allgemeinen höher, woraus sich eine erhöhte Einhaltung geringer Abmessungstoleranzen ergibt,
• – die Möglichkeit zum Auftragen des Lacks auf Platten mit großen Abmessungen vor dem Zuschneiden der Fliesen erlaubt eine bessere Reproduzierbarkeit von Dekoren, insbesondere der Tönung,
• – die Ebenheit ist höher, und erlaubt es folglich, den Mehrverbrauch von Mörtelkleber zu verringern, der benötigt wird, um eventuelle Freiräume zwischen der Verkleidung und der Wand aufzufüllen.

Here are some technical advantages compared to the ceramic tiling specified:

• The accuracy of the cut is generally higher, resulting in increased compliance with small dimensional tolerances,
• The possibility of applying the lacquer to large-sized panels before cutting the tiles allows a better reproducibility of decorations, in particular tinting,
• - The flatness is higher, and thus allows to reduce the excess consumption of mortar adhesive, which is needed to fill any space between the panel and the wall.

The The present invention will become more apparent upon reading the following detailed Description of non-limiting Embodiments better understandable, which in the attached Figures are shown.

The 1 and 4 show perspective views of different embodiments of the linings according to the invention,

the 2 . 3 and 5 show profile views of different embodiments of the linings according to the invention,

the 6 to 10 show various types of motifs that can be produced by acid engraving on the front surface of the panel according to the invention.

The 1 represents a perspective view of a tile with a square outline. The tile includes a monolithic clear glass pane 1 with 6 mm thickness, the back with a paint layer 2 50 μm thick applied by the curtain method. The front features acid etched motifs 3 in the form of rectangular parallelepipeds which are regularly spaced in the two mutually perpendicular directions of the tile.

• – Ein Bindemittel in Form eines Polyurethanharzes, das durch Vernetzen von hydroxylierten, aus der Polymerisation eines Acrylstyrens stammenden Acrylharzen mit einem nicht-aromatischen Isocyanat hergestellt wurde,
• – Mineralische Stoffe (Pigmente und Zuschläge) zu 55% Massenprozenten.

The varnish contains the following ingredients after drying:

• A binder in the form of a polyurethane resin prepared by crosslinking hydroxylated acrylic resins derived from the polymerization of an acrylstyrene with a non-aromatic isocyanate,
• - Mineral substances (pigments and aggregates) at 55% by mass.

This Varnish is applied by curtain method, followed by drying for 5 minutes. The Drying temperature is an important parameter for obtaining a sufficiently low water permeability. In these special conditions is the permeability too high at a drying temperature of less than 180 ° C, and after sticking to a wall using a mortar glue After the expiry of one day during the drying of the mortar, errors appear. As As it turns out, the mixing water of the mortar adhesive penetrates the lacquer layer, resulting in a double effect of peeling between the glass pane and the paint layer and a chemical attack on the glass surface leads. In contrast, the leads more Crosslinking of the binder at a drying temperature of more as 180 ° C to a lower water permeability, and there is no mistake after gluing with mortar glue.

The 2 represents a profile view of a tile. The edges of the monolithic glass pane 1 are ground so that they chamfer 4 by deburring the edges 5 and 6 , wherein this step is performed so that the painted surface 2 larger than the area of the front.

The 3 also shows a profile view of a tile. In this embodiment, the back side of the cladding is a silver layer silvering process 7 covered. The paint layer 2 then comes as a topcoat on this silver layer 7 ,

The 4 FIG. 12 illustrates a perspective view of a tile formed from a laminated glass pane which in turn comprises two 4 mm thick glass sheets and a polyvinyl butyral film joining them 13 with 0.76 mm thickness. The front is etched with acid and has motifs 10 in the form of small waves. One of the glass panes is partially cut in the drawing so that the arrangement of light emitting diodes (LED) 11 on the surface of the polyvinyl butyral 13 can be shown.

The 5 shows a profile view of a wall panel according to the invention, which has an incision 12 3 mm wide and 0.5 mm deep, produced after painting by grinding. A silver layer 7 is applied and comes as a topcoat over the lacquer layer and over the cut portion 12 , A second coat of paint 2 (from a different composition) was then applied to the entirety of the silvered area. From the front is the silver layer 7 so only through the incision 12 visible, noticeable.

The 6 to 10 illustrate various technically executable by etching treatment with acid (preferably hydrofluoric acid) on the front of wall panels according to the invention executable motifs. The dark sections represent the etched areas, which are thus set back from the bright sections that appear in relief.

The The present invention has been described above by way of example. It is understood that the skilled person is capable of various Modifications of the invention without the extent of the frame of the claims defined patent protection.

Claims (22)

Glass cladding, in particular in the form of tiles, for cladding walls, such as walls, floors or ceilings of a living space, with a glass substrate ( 1 ) applied to a surface to be applied to the walls with a varnish layer ( 2 ), characterized in that said lacquer ( 2 ) as a protective layer against corrosive attacks has such a low water permeability that the said cladding on the walls by means of ordinary, mixed with water mortar adhesives or cement adhesives can be attached. Wall cladding according to claim 1, characterized in that the lacquer ( 2 ) has a water permeability at 25 ° C of less than 10 ^-6 , in particular less than 10 ^-8 , or even less than 10 ^-13 · cm ³ · cm · cm ^-2 · s ^-1 · Pa ^-1 . Wall cladding according to one of the preceding claims, characterized in that the varnish ( 2 ) contains as binder a synthetic resin. Wallcovering according to one of the preceding claims, characterized characterized in that the binder is based on a polyurethane in particular produced by crosslinking a hydroxylated Acrylic resin with an isocyanate or a polyisocyanate. Wall cladding according to claim 3, characterized the binder is based on an alkyd resin base. Wall cladding according to one of the preceding claims, characterized in that a means for improving the adhesion in the form of a between the varnish layer ( 2 ) and the glass substrate ( 1 ) or dispersed with the paint is present. Wall cladding according to claim 6, characterized that the silane-based adhesion improving agent is produced is. Wall cladding according to one of the preceding claims, characterized in that a reflective layer ( 7 ), in particular a silvering for mirrors, and / or a decoration produced by screen printing or ink-jet between the lacquer layer ( 2 ) and the glass substrate ( 1 ) is introduced, and optionally covered with a coating for promoting the adhesion. Wall cladding according to one of the preceding claims, characterized in that the lacquer layer ( 2 ) contains ultraviolet radiation resistant pigments. Wall cladding according to one of the preceding claims, characterized in that the lacquer layer ( 2 ) contains mineral aggregates with a content in mass percentages between 40 and 70%. Wall cladding according to one of the preceding claims, characterized in that the glass substrate ( 1 ) is a monolithic glass. Wallcovering according to one of claims 1 to 10, characterized in that the glass substrate is a multi-pane with a plurality of glass sheets. Wall cladding according to one of the preceding claims, characterized in that the glass substrate on at least one of its surface sides relief-like pattern ( 3 ), which are produced by rolling and / or by acid matting and / or by sandblasting and / or by engraving. Wall cladding according to one of the preceding claims, characterized in that the entirety of the front side of the glass substrate ( 1 ) is matted by acid-matting, in particular by hydrofluoric acid, or by sandblasting. Wall cladding according to one of the preceding claims, characterized in that the glass substrate ( 1 ) on at least one of its surface sides, preferably on the front side, at least one functional layer with properties of optical type (anti-reflection layer systems) and / or slip-resistant type and / or surface character (in particular with anti-soiling, antibacterial, self-cleaning, hydrophobic, anti-fog, scratch-resistant, abrasion-resistant Features) is equipped. Wall cladding according to claim 12, characterized in that the glass substrate is a composite or multiple pane, the light-emitting diodes ( 11 ) contains. Wall cladding according to claim 12, characterized that the glass substrate is a double pane with a gas-tight spacer frame is, the space between their panes with an electric field effect capable of light discharges Gas filled is. Wall cladding according to one of the preceding claims, characterized in that the edges of the glass substrate are chamfered such that the bevel on the front side is larger than that on the back, and that the painted surface ( 2 ) is larger than the area of the front after chamfering. Wall cladding according to one of the preceding claims, characterized in that a part of the rear side and the lacquer layer ( 2 ) carved by mechanical means and then with a decorative layer ( 7 ), preferably coated with a silver layer, prepared by conventional silver plating techniques. Wall cladding according to claim 19, characterized in that the cuts ( 12 ) in the form of lines of 1 to 30 mm width and 0.5 to 3 mm depth, along straight lines at regular intervals and along two mutually perpendicular directions. Glass-based wallcovering, with one by screen printing or inkjet on the back a glass substrate applied decor. Modular wall cladding, with individual slabs in a uniform pitch, for example of 15 cm, and multiples thereof with square or rectangular outline sen are made.