Technical Field

The present disclosure relates in general to a lacquer composition and more particularly to mono-component single stage lacquer composition for glass substrates that eliminates the use of any base coat on the glass substrate and top coat above the mono-component lacquer and a method of making a lacquered glass thereof.

Background

Glass and glass products, due to the need of aesthetics and performance, need a glass lacquer coating to be applied. But the conventional glass lacquer coatings existing have the following problems: glass lacquer coatings are conventionally two- component coatings owing to which they require spot deployment; two-component coatings have very short pot- life post deployment thus leading to failure and material wastage; two-component coating equipment requires controlled mixing and supply of two components, lest the coating quality will vary; further two-component coating equipment includes mixing and supply means for two components, rather than one, and this additional equipment must be cleaned before applying a new or different coating to a substrate.

The state of art of aqueous one-components polyurethane (PU) dispersions is very extensive. However, stringent requirements, in particular in properties such as adhesion, chemical resistance and scratch resistance, have not been satisfactorily met. Further the problem with disperse systems such as those of the aforementioned type, is that for the actual film formation in the coating process, the coalescence and filming of the disperse polymer particles must take place so that a homogeneous optically flawless film is obtained. Due to the complexity of the process, this is much more difficult and error-prone than in systems in which the film-forming polymer is in a dissolved state.

Referring to U.S. Patent application 20190040278 describes one component polyurethane dispersions (PUD) for use on wood surfaces. The PUD prepared by the invention has improved adherence to vinyl and wood, has humidity resistance and pencil hardness. However, in such dispersions the polymer property of the PU cannot be altered and serious limitations exists with respect to solid content.

While it is true that water-based lacquer compositions are being developed to replace their solvent-based counterparts due to their advantages such as nominal cost, non-inflammability, true odorlessness, and nontoxicity, one cannot overlook the challenges in preparing and coating water- based lacquers. These include limited number of water soluble or water dispersible materials, susceptibility to changing weather conditions once cured on glass, slow curing times, very fair amount of mechanical stability and difficulty in producing coatings with high gloss from dispersion systems.

Referring to Canadian Patent application 2184559 discloses liquid one- component polyurethane stoving enamel comprising polyurethane, partially or totally blocked polyisocyanate and an organic bismuth having high solids content and storage stability. Although the patent discloses organic bismuth catalyst to reduce the curing temperature and increase shelf-life of the formulation, the use of bismuth is hazardous.

Although the state of the art of one-component paint compositions is very extensive, there is still a great need for improved products. Particularly required are low to no emissions, high solids contents, high processing safety and robustness against external influences, e.g. with regard to fluctuating values of air humidity or low storage temperatures, high layer thicknesses which can be achieved without disruption, stability against hydrolysis, excellent film-mechanical properties and, moreover, frequently also high crosslinking densities or high functionalities.

It is an object of the present disclosure to provide one-component coatings having improved film-forming properties which meet the abovementioned requirements and are suitable for optically flawless coatings having an advantageous property profile. Thus when compared to the prior art, the advantages of the present disclosure are that the lacquer composition is a mono- component coating, does not require spot deployment, have longer pot life, avoids two-component coatings prone wastages and short pot life problems, does not cause environmental pollution in the production process, use of the process does not harm human and the present coating formulation is sufficiently cured, has high adhesion strength, mechanical resistance and high gloss value thereby giving a smooth appearance to the coated glass substrates.

The present disclosure relates to a mono-component lacquer formulation for glass substrates comprising a resin, pigments and surfactants dissolved in an organic solvent. The lacquer formulation may further comprise curing agents or drying catalysts and optionally contain fillers. The mono-component lacquer of the present disclosure is a single stage coating system that eliminates the use of any base coat or top coat on the glass substrate being applied with the lacquer formulation.

Summary of the Disclosure In one aspect of the present disclosure, a mono-component lacquer for glass substrates comprising about 15 - 55% of at least one resin selected from the group consisting of polyurethane, polyol, epoxy, melamine formaldehyde, acrylic or epoxy ester resins; about 3 - 30% of organic or inorganic pigments and about 1 - 5% surfactants dissolved in 15 -25% of organic solvent is disclosed. The mono-component lacquer composition eliminates the use of any base coat on the glass substrate and top coat above the mono-component lacquer.

In another aspect of the present disclosure, a method of making a lacquered glass by using the mono-component lacquer of the present disclosure is disclosed. The method involves the steps of cleaning a glass substrate having a first surface and a second surface, coating the mono-component lacquer composition on the first surface of the glass substrate and curing the second surface of the glass substrate coated with the mono-component lacquer composition for about 5 - 20 minutes to obtain a lacquered glass.

Other features and aspects of this disclosure will be apparent from the following description and the accompanying drawings.

Brief Description of the Drawings

Embodiments are illustrated by way of example and are not limited in the accompanying figures. FIG. 1 illustrates a cross-sectional view of a lacquered glass article, in accordance with one embodiment of the present disclosure.

Skilled artisans appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the invention.

Detailed Description

Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or the like parts. Embodiments disclosed herein are related to a mono-component lacquer for glass substrates and a lacquered glass article prepared according to the teachings of the present disclosure.

The mono-component lacquer compositions of the present disclosure unexpectedly exhibited improved pot life without the inclusion of any base coat or top coat to the glass substrates provided with the mono-component lacquer compositions. “Mono-component” coating compositions refer to compositions which can be made in a single batch and stored in a single container, without any need to keep the resin separate from cross linker. The blocked isocyanate used in one or more polyol resin compositions can be readily cured at lower temperatures than the currently available one-components poly isocyanate coatings.

FIG. 1 illustrates a cross-sectional view of a lacquered glass article 100 in accordance with one embodiment of the present disclosure. As shown, the lacquered glass article 100 includes a glass substrate 110. The glass substrate 110 is provided with a mono-component lacquer composition 200 on a first surface 101 of the glass substrate 110. In one embodiment of the present disclosure, the mono-component lacquer composition 200 can be provided on a second surface 102 of the glass substrate. The mono- component lacquer composition 200 is provided directly over the surface of the glass substrate 110 and comprises of a resin, pigments and surfactants dissolved in anorganic solvent. In few embodiments of the present disclosure, the mono-component lacquer composition 200 comprises curing agents or drying catalysts and optionally contain fillers. In one embodiment of the present disclosure, the mono-component lacquer composition 200 is provided on the entire surface of the glass substrate 110. In a few other embodiments the mono-component lacquer composition 200 covering about 10 - 80% of the surface area of the glass substrate 110 is provided. In such an embodiment, the mono-component lacquer composition 200 may be provided in the form of a decorative pattern using screen printing techniques to obtain various shapes and sizes.

The mono-component lacquer composition 200 of the present disclosure comprises of at least one resin selected from the group consisting of polyurethane, polyol, epoxy, melamine formaldehyde, acrylic or epoxy-ester resins. The resin present in the mono-component lacquer composition 200 may be used along with or without suitable curing agents and drying catalysts. In one embodiment, the resin present in the mono-component lacquer composition 200 can be polyester polyol, acrylic polyol, solid thermoplastic acrylic resin or thermoset acrylic resin. In one other embodiment of the present disclosure, the mono-component lacquer composition 200 is polyurethane or melamine formaldehyde. The resin present in the mono-component lacquer composition 200 of the present disclosure ranges between 15 - 55% and more preferably between 20 - 50%.

The pigments present in the mono- component lacquer composition 200 are selected from a metal pigment or an organic pigment. In one embodiment of the present disclosure, the metal pigments may include, for example, metals such as aluminum, copper, zinc, iron, tin and the like; alloys or salts of these metals and mica pigment, a shape thereof may not particularly be limited, but is suitably flaky or in powder form or platelet-shaped.

In one embodiment of the present disclosure, the color pigments may include, for example, inorganic color pigments such as titanium oxide, red oxide, yellow iron oxide, carbon black and the like; organic color pigment such as phthalocyanine blue, quinacridone red, perylene red and the like. In one aspect of the present embodiment, the pigments constitute about 3 - 30% of the mono-component lacquer composition 200. In a preferred embodiment, the concentration of the pigment is maintained between 10 - 25%. In yet another embodiment of the present disclosure, metallic pigments such as aluminum paste pigments are employed to obtain a metallic lacquer composition. The aluminum paste pigments when employed adopt an orientation largely parallel to the glass substrate 110. Thus, by the action of numerous small mirrors, a directed reflection is produced, which gives the metallic gloss and brightness. The inclusion of such metallic pigments result in increased light reflection which provides an attractive metallic appearance to the lacquer. Such a lacquered glass article is suitable for all interior surfaces where metallic color contributes brightness and aesthetic improvement of an area. Metallic paint generates distinctive color travel effects. Embodiments relating to such metallic mono- component lacquer composition comprise preferably about 3% of metallic pigments.

In yet another embodiment of the present disclosure, the mono component lacquer composition 200 comprises dichroic pigments that are designed to reflect light over a certain range of wavelength and transmit light outside the said range, thus generating a distinctive viewing angle dependent on the color travel effects. Embodiments relating to such dichroic mono- component lacquer composition comprise preferably about 3% of dichroic pigments.

The concentration of the pigment is adjusted in such a way that the viscosity of the mono-component lacquer composition 200 does not increase during storage. This results in the mono-component lacquer composition 200 exhibiting a good color conditioning and workability. Further the mono-component lacquer composition 200 provides a finish with excellent depth of color.

Further the mono-component lacquer composition 200 contains one or more surfactants selected from the group consisting of adhesion promoters, flow agents, defoamers, leveling agents, wetting agents, dispersion agents and rheology modifiers. The adhesion promoters are selected from the group consisting of 3- glycidyloxypropyl trimethoxysilane, polymeric salt-acidic group hybrid, epoxy silane oligomer, metal chelating titanate or zirconate, g-minopropyltriethoxysilane or vinyltrimethoxysilane. The mono-component lacquer composition 200 contains about 0.1 - 5% of adhesion promoters. Commercially available rheology modifiers, flow agents, leveling agents, de-aerators, deformers, wetting agents and dispersion agents may be used in the preparation of the mono- component lacquer composition 200. However, the total amount of surfactants present in the lacquer composition 200 is adjusted to be in the range of 0.1 - 5%.

Additionally, in a few embodiments of the present disclosure, the mono component lacquer composition 200 contains curing agents and / or drying catalysts. A curing agent used in the present disclosure can be a blocked isocyanate or a blocked poly isocyanate which is easy to prepare and cures in a short span of time and lower temperature. In one embodiment of the present disclosure, the curing agent ranges between 5 -40%. Drying catalysts such as dibutyltin dilaurate or zinc naphthenate are used for the mono-component lacquer compositions of the present disclosure.

In yet another embodiment of the present disclosure, filler present in the mono-component lacquer composition 200 of the present disclosure binds to the polymeric chain of the resin and provides for re-enforcing the polymeric chains and thereby contributes to the mechanical durability of the mono- component lacquer composition 200 and as well renders the lacquer resistant to chemical and physical damages. In one embodiment of the present disclosure, the filler is an inorganic particle selected from the group consisting of mica, glass beads, calcium carbonate or barium sulfate. In a preferred embodiment, glass beads are used as a filler in the lacquer composition 200. In one aspect of the present embodiment, the filler constitutes about 2 - 20% of the lacquer composition 200. In another aspect of the present embodiment, the inorganic particles present in the lacquer composition have a particle size ranging between 100 nm - 20m

The organic solvent may be at least one selected from the group consisting of toluene, xylene, acetone or butanone. Aliphatic solvents, such as heptane, octane and hexane; ester solvents, such as butyl acetate, cellulose acetate, isobutyl acetate, butyl propionate, ethyl acetate, isopropyl acetate, butyl acetate, amyl acetate, ethyl propionate and isobutylene isobutyrate; ketone solvents, such as acetone and methyl ethyl ketone can also be used. Few example embodiments of the present disclosure, further teach the presence of co-solvent selected from the above list of solvents. In multiple embodiments of the present disclosure, that teach the presence of metallic pigments and/ or dichroic pigments, the mono- component lacquer composition 200 is further envisioned to be water-based. In one such preferred embodiment, the metallic or dichroic mono-component lacquer composition 200 comprises polyurethane dispersions that constitute more than 80% the weight of the lacquer.

The mono-component lacquer composition 200 of the present disclosure may be coated on the glass substrate 110 which can be flat or curved using conventional coating techniques such as Meyer rod coating, curtain coating, roller coating, spin coating, bar coating or spray coating. The coating once applied is cured at about 140° to 180° C. for 5 to 30 minutes. The resulting coating is about 40 - 100 pm thick, preferably 55 - 65 pm thick, has good gloss and is opaque. The lacquer composition of the disclosure does not yellow on curing and gives a hard, durable, scratch-resistant, gasoline-resistant, weather-resistant, alkali-resistant, glossy coating which is suitable for all interior glass applications including but not limited to partitions, wall cladding and decorative purposes that necessitate having bright, opaque colors and improved aesthetics.

Examples Example 1

Preparation of Mono-component Lacquer Composition

Mono-components lacquer compositions according to the teachings of the present disclosure were prepared using the compounds listed in Table 1. The lacquer composition was prepared by first mixing the surfactants (rheology modifiers, flow agents, leveling agents, de-aerators, deformers, wetting agents or dispersion agents) in 5 - 30% of solvent by stirring the solution in medium speed. The pigments were then added to the solution and stirred in high speed to facilitate good dispersion of the pigment in the solution following which the desired concentration of resin was added at slow stirring speed. The viscosity of the resultant composition was adjusted to ford cup 4 efflux time 15 - 150 seconds, more preferably between ford cup 4 efflux time 40 - 60 seconds. Thickeners were added when the resultant composition was found to be thin and running. 5

Table 1: Preparation of Mono-Component Lacquer Compositions

Example 2

Coating of Lacquer Composition

The surfaces of glass substrates of size 300 x 300 mm were cleaned 5 thoroughly to remove dust, dirt and other settlements on the glass surface. The mono component lacquer compositions prepared according to example 1 were coated on the cleaned surface of the glass substrates using a Meyer Rod (rod size wire # 80, 90). The thickness of the lacquer coating was adjusted to be between 40 - 100 pm. The lacquer coated glass substrates were then cured in an oven at a temperature ranging between 10 120 - 180°C for about 8 - 15 minutes. The lacquered glass substrates were found to be completely cured at the end of the curing step. The mono- component lacquer compositions were found to have formed an opaque, glossy, bright, uniform and continuous coating.

Example 3

15 Optical & Mechanical Properties Testing of Lacquered Glass Substrates

The mechanical properties such as hardness, adhesion strength and scratch resistance of the lacquer compositions shown in example 1 coated on the surface of the glass substrates were tested. Opacity studies, cross cut test (ISO 2409 standard) and visible scratch test (EN 438 standard) were carried out. These 20 experiments were conducted to test the mechanical and optical durability of the lacquered glass substrates of the present disclosure in comparison with a conventional lacquered glass sample available in the market.

Though the mechanical studies carried out showed similar results for samples prepared by the teaching of the present disclosure and the market sample, the 25 sample prepared by the present disclosure showed a significantly high performance in visible scratch test. The visible scratch resistance is an important criterion for lacquered glass substrates. This visible scratch resistance provides mechanical resistance against scratches that can appear during cutting and edge grinding of glass that result in chipping off of edges and also against rough handling of samples. The high mechanical resistance reported by the sample prepared using the present disclosure could be attributed to the lacquer composition comprising resins that are highly cross linked and polymerized. On the other hand, the market sample showed a relatively lower performance which could be attributed to the presence of organic solvents and less cross linking resins. Table 2: Mechanical Testing - Results

This better performance of these samples is attributed to the high degree of cross linking seen in the resins present in the lacquer composition. While samples 1 has good opacity and color value, samples 2 and 3 did not record desired opacity and color values.

Example 4

Gloss Measurements The gloss value of the lacquered glass substrates prepared according to the present disclosure was measured using a gloss meter with R 60° angle and the values are shown in table 4.

Table 4: Gloss Value of Lacquered Glass Substrates

Samples of present disclosure except for sample 5 was found to have more gloss than the market sample. Again the choice of resin for preparing the lacquer composition of the present disclosure contributes to the gloss value.

Thus the lacquered glass article 100 of the present disclosure is very unique with significantly high mechanical & optical properties, durability performance, significant gloss value and is more cost-effective (almost 50% cost reduction) than commercially available lacquered glass products.

Example 5

Preparation of Metallic Mono-component Lacquer Composition: Metallic mono-components lacquer compositions according to the teachings of the present disclosure were prepared using the compounds listed in Table 5. The lacquer composition was prepared by first mixing the surfactants (rheology modifiers, flow agents, leveling agents, de-aerators, deformers, wetting agents or dispersion agents) in 5 - 30% of solvent by stirring the solution in medium speed. The pigments were then added to the solution and stirred in high speed to facilitate good dispersion of the pigment in the solution following which the desired concentration of resin was added at slow stirring speed. The viscosity of the resultant composition was adjusted to ford cup 4 efflux time 15 - 150 seconds, more preferably between ford cup 4 efflux time 40 - 60 seconds. Thickeners were added when the resultant composition was found to be thin and running. Table 5: Preparation of Metallic Mono-Component Lacquer Compositions

Example 6

Gloss, Optical & Mechanical Properties Testing of Metallic Lacquered Glass Substrates

The mechanical properties such as hardness, adhesion strength and scratch resistance of the lacquer compositions shown in example 5 coated on the surface of the glass substrates were tested.

Table 6: Mechanical Testing & Gloss Measurements - Results

Samples of present disclosure especially sample 8 was found to have more gloss value that highly improved the aesthetic quotient. High gloss value with metallic appearance provided by the metallic pigment yields a high performing lacquered glass that is durable and aesthetic.

Example 7

Preparation of Dichroic Mono- component Lacquer Composition:

Dichroic mono-components lacquer compositions according to the teachings of the present disclosure were prepared using the compounds listed in Table 7.

Table 7: Preparation of Dichroic Mono-Component Lacquer Compositions

Samples of present disclosure in example 7 were found to have exhibit two or more colors depending on the viewing angle of the glass substrate. These technologically advanced lacquer coatings create high visual impact when applied in interior and exterior applications.

Industrial Application

The mono-component lacquer composition 200 described in the present disclosure does not require any top coat or base coat over and hence involves only a single stage paint development. Further the mono- component lacquer coatings are more cost effective over the two-component paint coatings available in the market. Further the coating composition involve simple inexpensive chemistry and involve shorter curing time of the lacquered substrates in lower temperature range. Other significant advantage of this mono-component lacquer composition is that the coatings show increased pot-life thereby drastically reducing material wastages. The mono- component lacquer composition 200 of the present invention are readily incorporated with metallic and dichroic pigments to obtain metallic lacquered glass articles and dichroic lacquered glass articles. This advantageously depicts the versatility of the proposed formulation for adaptability to a wide range of pigment groups.

Furthermore, the lacquer composition 200 of the present disclosure showed equal performance and properties and in few tests such as visible scratch improved performance when compared to the conventional lacquer available in the market taken as a standard. The lacquered glass article 100 according to this disclosure may have various applications. The lacquered glass article 100 may, for example be used for various interior applications of buildings including but not limited to wardrobes, as doors for furniture, as partitions, in tables, shelves, in bathrooms, in shops displays, as wall covering or as spandrels. Such lacquered glass article 100 may also be used for decorative purposes as not limiting to a wall mount in office spaces, lift lobbies, receptions, kitchens, bathrooms and could also be possibly used as dining and coffee table surfaces. More and more of these applications necessitate the glass article to be resistant to scratches, color fading/ bleaching, humidity exposure, moisture exposure and peeling of the lacquer layer.

Installation of the lacquered glass article 100 of the present disclosure in such applications achieve both aesthetic appeal and functional performance. The utilization of the lacquer composition of the present disclosure facilitates robustness against handling and storage degradation, and enhances flexibility for transportation in the as-coated state.

The present disclosure also relates to a method of making the lacquered glass article 100. The method comprises of steps 310 to 330. In multiple embodiments of the present disclosure, the lacquered glass article 100 illustrated in FIG. 1 may be obtained by performing the steps of the method.

In step 310, the glass substrate is first cleaned thoroughly by a mixture of ceria and calcium carbonate powders with the help of rotating brush. The air side of the glass substrate was cleaned. Following which, the cleaned glass substrate was dried thoroughly by compressed air flow knife. The surface was then silane treated. In step 320, desired viscosity and thixotropy of the mono-component lacquer composition was obtained by adding appropriate concentration of the various components of the mono component lacquer. The prepared mono- component lacquer composition was then applied on the surface of the glass substrate using a Meyer Rod technique.

Various patterns including dots, rectangular bars etc. of varying diameters and depths were created on the surface of the glass substrate. The thickness of the lacquer coating was controlled to be not more than 100 pm by using different rod size and moderating the coating parameters. The surface area to be covered by the lacquer composition of the present disclosure is varied based on the requirement. In one embodiment, the lacquer layer is coated to cover a surface area ranging between 10% and 80%. In the final step 330, the lacquered glass substrate was cured. The lacquered glass substrate was passed through a continuous convective IR oven with temperatures ranging between 120 °C and 180 °C. Residence time in the oven was between 5 minutes to 30 minutes. In alternate embodiments of the present disclosure, other drying techniques including thermal oven, heat combustion, UV curing can also be used.

The lacquer coated glass substrate can withstand subsequent transportation, washing (if needed). Further the lacquer coating does not yellow during the curing process and results in a hard, durable, scratch-resistant, gasoline-resistant, weather-resistant, alkali-resistant, acid-resistant, glossy coating.

Note that not all of the activities described above in the general description or the examples are required, that a portion of a specific activity may not be required, and that one or more further activities may be performed in addition to those described. Still further, the order in which activities are listed is not necessarily the order in which they are performed.

Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any feature(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature of any or all the claims.

The specification and illustrations of the embodiments described herein are intended to provide a general understanding of the structure of the various embodiments. The specification and illustrations are not intended to serve as an exhaustive and comprehensive description of all of the elements and features of apparatus and systems that use the structures or methods described herein. Certain features, that are for clarity, described herein in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features that are, for brevity, described in the context of a single embodiment, may also be provided separately or in a sub combination. Further, reference to values stated in ranges includes each and every value within that range. Many other embodiments may be apparent to skilled artisans only after reading this specification. Other embodiments may be used and derived from the disclosure, such that a structural substitution, logical substitution, or another change may be made without departing from the scope of the disclosure. Accordingly, the disclosure is to be regarded as illustrative rather than restrictive. The description in combination with the figures is provided to assist in understanding the teachings disclosed herein, is provided to assist in describing the teachings, and should not be interpreted as a limitation on the scope or applicability of the teachings. However, other teachings can certainly be used in this application.

As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having" or any other variation thereof, are intended to cover a non exclusive inclusion. For example, a method, article, or apparatus that comprises a list of features is not necessarily limited only to those features but may include other features not expressly listed or inherent to such method, article, or apparatus. Further, unless expressly stated to the contrary, "or" refers to an inclusive-or and not to an exclusive-or. For example, a condition A or B is satisfied by any one of the following : A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).

Also, the use of "a" or "an" is employed to describe elements and components described herein. This is done merely for convenience and to give a general sense of the scope of the invention. This description should be read to include one or at least one and the singular also includes the plural, or vice versa, unless it is clear that it is meant otherwise. For example, when a single item is described herein, more than one item may be used in place of a single item. Similarly, where more than one item is described herein, a single item may be substituted for that more than one item.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The materials, methods, and examples are illustrative only and not intended to be limiting. To the extent that certain details regarding specific materials and processing acts are not described, such details may include conventional approaches, which may be found in reference books and other sources within the manufacturing arts.

While aspects of the present disclosure have been particularly shown and described with reference to the embodiments above, it will be understood by those skilled in the art that various additional embodiments may be contemplated by the modification of the disclosed machines, systems and methods without departing from the spirit and scope of what is disclosed. Such embodiments should be understood to fall within the scope of the present disclosure as determined based upon the claims and any equivalents thereof.

List of Elements

TITLE: A MONO-COMPONENT LACQUER FOR GLASS SUBSTRATES

100 Lacquered Glass Article

101 First Surface

102 Second Surface

110 Glass substrate

200 Mono-Component Lacquer Composition

300 Method

310 Step

320 Step

330 Step