JP2007031198A - Ceramic product, and method for etching the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceramic product in which a projected and recessed pattern having a smooth surface can be formed without partially removing a covered glass layer, and which can improve productivity, and to provide a method for etching the same. <P>SOLUTION: The ceramic product 1 is provided with: a ceramic base material 2; and a covered glass layer 3 formed on the surface of the ceramic base material 2, wherein a projected and recessed pattern 7 is formed on the covered glass layer 3. The projected and recessed pattern 7 is formed by etching glass for etching containing 3 to 20wt.% vanadium pentoxide to base glass composing the covered glass layer 3, and performing firing under heating at 850 to 950°C. The cross-sectional shape of the surface design in the projected and recessed pattern 7 is provided with: a flat pattern central part 71; recessed parts 72 formed on both sides of the pattern central part 71; and projecting parts 73 each formed adjacently to the outside of the recessed part 72. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ceramic product having a coated glass layer formed on the surface and an etching method thereof.

  As a method of forming various etching patterns on the coated glass layer formed on the surface of the ceramic product, for example, after masking a portion that is not etched, a chemical solution such as a hydrogen fluoride solution is applied to partially coat the coated glass layer. There is a partial dissolution method in which an etching pattern is formed. According to this method, the surface of the masked portion is maintained, while the unmasked portion is corroded by the chemical solution, whereby an etching pattern can be formed.

  As another etching method, for example, there is a sand blasting method in which an etching pattern is formed by spraying abrasive grains (abrasive) such as a large number of ceramic powders on a coated glass layer. According to this method, an etching pattern can be formed by forming a large number of depressions on the surface of a site where a large number of abrasive grains collide.

However, the conventional etching method has the following problems.
That is, in the said partial dissolution method, since a coating glass layer is eluted with a chemical | medical solution, there exists a possibility that a coating glass layer may elute more than necessary. Further, in the sandblasting method, since a large number of abrasive grains are sprayed on the coated glass layer, it is difficult to adjust the spraying pressure, the size of the abrasive grains to be sprayed, and in some cases, the coated glass layer may be peeled off. there were.
Therefore, in order to stably fix the coated glass layer on the surface of the ceramic product while maintaining the necessary thickness, further ingenuity has been required.

  Moreover, in the said partial dissolution method, it was necessary to mask partially and this masking operation took time and effort. Further, in the sandblasting method, since a large number of abrasive grains are scattered around, it takes time to manage the scattered abrasive grains. Therefore, in order to improve the productivity of ceramic products, further devices have been required.

Note that Patent Document 1 discloses a method for manufacturing a gold decorative product in which a decorative object made of ceramics or ceramics is decorated with gold. In this manufacturing method, a bright layer made of bright gold paste and a mat layer made of matte gold paste are formed adjacent to the object to be baked with the glaze glass layer, and baked at 750 to 900 ° C. A V-shaped groove is formed at the boundary between the bright layer and the mat layer.
However, the technique of Patent Document 1 is a technique for performing a three-dimensional gold decoration on an object to be decorated such as ceramics, and stably fixing the coated glass layer on the surface of the ceramics while maintaining a necessary thickness. No technology is disclosed for this purpose.

JP 2000-26178 A

  The present invention has been made in view of such conventional problems, and is capable of forming a smooth surface uneven pattern without partially removing the coated glass layer, and can improve productivity. A product and an etching method thereof are to be provided.

The first invention provides a preparation step of preparing a ceramic product formed by forming a coated glass layer on the surface of a ceramic substrate;
A pattern forming step of applying an etching paste formed by kneading an etching glass containing 3 to 20 wt% of vanadium pentoxide and an organic binder to the transfer paper, and forming a transfer pattern on the transfer paper;
A pattern transfer step of transferring the transfer pattern from the transfer paper to the coated glass layer and forming an etching pattern on the coated glass layer;
An etching method for a ceramic product, comprising: an etching step in which the ceramic product on which the etching pattern is formed is heated and fired at a temperature of 850 to 950 ° C. to perform etching (Claim 1).

In the etching method of the present invention, first, as a preparation step, a ceramic product formed by forming a coated glass layer on the surface of a ceramic substrate is prepared.
Further, as a pattern forming step, an etching paste is applied to the transfer paper to form a transfer pattern. Then, the etching paste used this time, the five vanadium oxide (V ₂ O ₅₎ and glass etching including 3-20 wt%, and made by kneading an organic binder.
At this time, various decorative patterns can be used as the transfer pattern.

Next, as a transfer process, the transfer pattern on the transfer paper is transferred to a coated glass layer in the ceramic product to form an etching pattern, and then the ceramic product is heated and fired at a temperature of 850 to 950 ° C. as an etching process.
At this time, the etching pattern is etched on the surface of the coated glass layer, and the etching paste applied to the surface of the coated glass layer forms an uneven pattern on the surface of the coated glass layer and is integrated with the coated glass layer. The

And the uneven | corrugated pattern formed in the surface of a coating glass layer does not produce elution or peeling in a part of glass which comprises a coating glass layer, but moves the glass which comprises a coating glass layer partially. Can be formed. Therefore, an uneven pattern having a smooth surface can be formed without partially removing the coated glass layer.
Moreover, in order to perform the said etching, it is not necessary to mask partially, and it can etch simply by forming an etching pattern in a covering glass layer. Therefore, productivity of ceramic products can be improved.

  Therefore, according to the etching method of the present invention, an uneven pattern having a smooth surface can be formed without partially removing the coated glass layer, and the productivity of the ceramic product can be improved.

The second invention provides a preparation step of preparing a ceramic product formed by forming a coated glass layer on the surface of a ceramic substrate;
A pattern forming step of applying an etching paste formed by kneading an etching glass containing 3 to 20 wt% of vanadium pentoxide and an organic binder to the coated glass layer, and forming an etching pattern on the coated glass layer;
An etching method for a ceramic product, comprising: an etching step in which the ceramic product on which the etching pattern is formed is heated and fired at a temperature of 850 to 950 ° C. to perform etching.

Also in the etching method of the present invention, first, as a preparation step, a ceramic product formed by forming a coated glass layer on the surface of a ceramic substrate is prepared.
Next, as a pattern forming step, an etching paste is applied to the coated glass layer in the ceramic product to form an etching pattern. Then, the etching paste used this time, the five vanadium oxide (V ₂ O ₅₎ and glass etching including 3-20 wt%, and made by kneading an organic binder.
At this time, various decorative patterns can be used as the etching pattern.

Next, as the etching step, the ceramic product is heated and fired at a temperature of 850 to 950 ° C.
At this time, the etching pattern is etched on the surface of the coated glass layer, and the etching paste applied to the surface of the coated glass layer forms an uneven pattern on the surface of the coated glass layer and is integrated with the coated glass layer. The

  Therefore, according to the etching method of the present invention, as in the first aspect of the invention, a surface-concave uneven pattern can be formed without partially removing the coated glass layer, thereby improving the productivity of ceramic products. Can be improved.

A third invention is a ceramic product comprising a ceramic substrate and a coated glass layer formed on the surface of the ceramic substrate, wherein the coated glass layer is formed with a concavo-convex pattern,
The concavo-convex pattern is formed by etching an etching glass containing vanadium pentoxide in an amount of 3 to 20 wt% on the basic glass constituting the coated glass layer,
The cross-sectional shape of the surface pattern in the concavo-convex pattern is formed by etching the etching glass to form a flat pattern central part, a concave part formed on both sides of the central part of the pattern, and an outer side of the concave part. The ceramic product is provided with a convex portion (claim 5).

The ceramic product of the present invention includes a coated glass layer having a concavo-convex pattern formed by etching glass for etching containing ₃ to 20 wt% of vanadium pentoxide (V ₂ O ₅ ).
And the cross-sectional shape of the surface pattern in an uneven | corrugated pattern is formed of the said pattern center part, a recessed part, and a convex part. Thereby, the uneven | corrugated pattern is formed by moving the base glass which comprises a covering glass layer partially.

  Therefore, according to the present invention, it is possible to provide a ceramic product having a smooth surface unevenness pattern on the coated glass layer from which the coated glass layer has been partially removed, and having excellent productivity.

A preferred embodiment of the first to third inventions described above will be described.
In the first to third inventions, the etching glass containing ₃ to 20 wt% of the vanadium pentoxide (V ₂ O ₅ ) includes SiO ₂ (silica), Al ₂ O ₃ (alumina), and B ₂ O _3. SiO ₂ —Al ₂ O ₃ —B ₂ O ₃ glass containing (boric acid) can be used. Examples of the SiO ₂ —Al ₂ O ₃ —B ₂ O ₃ glass include R ₂ O (R represents Li, K, Na, etc.), R′O (R ′ represents Ca, Ba, Sr, Mg, Zn or the like is shown), TiO ₂ (titanium oxide), ZrO ₂ (zirconia), SnO (tin oxide) or the like as a subcomponent can be used containing one or more.
Further, glass etching, for example, be a powder of _{SiO 2 -Al 2 O 3 -B 2} O 3 -Li 2 O-K 2 O-ZrO 2 -V 2 O 5.

  The ceramic product may be obtained by baking the surface of a ceramic substrate with the glass as a glass. The ceramic substrate can be a porcelain such as bone china or an oxidized porcelain. Moreover, ceramic products can be made into various shapes, for example, ceramics such as tableware, baskets, vases, and figurines.

When the content of the vanadium pentoxide with respect to the total amount of the glass is less than 3 wt%, it is difficult to perform sufficient etching (form unevenness on the surface of the coated glass layer). On the other hand, when the content of vanadium pentoxide with respect to the total amount of glass exceeds 20 wt%, the surface of the etched part may be colored dark brown.
Even when etching is performed with glass containing vanadium pentoxide of 20 wt% or less, the surface of the etched portion may be colored light tan.

  Further, in the first and second inventions, when the temperature for performing the heating and baking is less than 850 ° C., the temperature is low and sufficient etching (forming unevenness on the surface of the coated glass layer) is performed. It becomes difficult to do. On the other hand, when the temperature for performing the above baking is higher than 950 ° C., the temperature is high, the coated glass layer may be softened, and the sharpness of the unevenness formed on the surface of the coated glass layer may be reduced. .

In the first to third inventions, as the organic binder, for example, a resin can be used. Examples of the resin include acrylic resins, amide resins, alkyd resins, ethyl cellulose resins, and nitrocellulose. A resin or the like can be used.
In the first invention, the etching paste can be applied (applied) to the transfer paper using a screen printing method, a metal mask printing method, or the like. Further, as the transfer paper, cardboard coated with starch or the like can be used.

In the said 1st, 2nd invention, the average thickness of the coating glass layer in the said ceramic product prepared in the said preparatory process can be 100-200 micrometers, for example. In this case, the thickness of the coated glass layer is thin, and etching cannot be performed satisfactorily by conventional etching methods such as partial melting or sandblasting. On the other hand, according to the first and second inventions, A concavo-convex pattern can be formed on the surface without producing a peeled portion from which the coated glass layer has been removed.
Moreover, in the said pattern formation process or pattern transfer process, the thickness of the etching pattern formed in the said covering glass layer can be 10-50 micrometers, for example.

  In the first aspect of the invention, in the pattern forming step, a transfer coloring pattern is formed on the transfer paper, and the transfer pattern is formed as an outline of the transfer coloring pattern. In the step, it is preferable that the transfer pattern and the transfer coloring pattern are transferred from the transfer paper to the coating glass layer to form the etching pattern and the coloring pattern on the coating glass layer. . In the second aspect of the invention, in the pattern forming step, a colored pattern is preferably formed on the coated glass layer, and the etching pattern is preferably formed as an outline of the colored pattern. .

In these cases, a colored pattern can be formed on the coated glass layer of the ceramic product by a colored pattern, and an uneven pattern formed by the etching can be formed on the outline of the colored pattern. Thereby, the uneven | corrugated pattern by an etching can be made more conspicuous.
In addition, when the said etching pattern is formed on the said coloring pattern, there exists a possibility that the coloring of a coloring pattern may change with the yellowish brown by an etching pattern.

In the third aspect of the invention, the coated glass layer is preferably provided with a colored pattern colored by a paint, and the uneven pattern is formed as an outline of the colored pattern. 6).
In this case, the concavo-convex pattern by etching can be made more prominent.

Hereinafter, embodiments of the ceramic product and the etching method thereof according to the present invention will be described with reference to the drawings.
Example 1
As shown in FIGS. 1 and 7, the ceramic product 1 manufactured in this example includes a ceramic substrate 2 and a coated glass layer 3 formed on the surface of the ceramic substrate 2. 7 is formed.
This uneven pattern 7, the base glass constituting the coated glass layer 3, vanadium pentoxide (V ₂ O ₅₎ etching the etching glass containing 3-20 wt%, and firing at a temperature of 850 to 950 ° C. It is formed.

As shown in FIG. 1, the cross-sectional shape of the surface pattern in the concavo-convex pattern 7 is obtained by etching the etching glass to form a flat pattern central portion 71 and concave portions formed on both sides of the pattern central portion 71. 72 and a convex portion 73 formed adjacent to the outside of the concave portion 72.
Hereinafter, a method for manufacturing the ceramic product 1 formed by etching to form a surface pattern by the uneven pattern 7 will be described in detail with reference to FIGS.

In this example, the ceramic product 10 is etched by performing the following preparation step, pattern formation step, pattern transfer step, and etching step.
In the preparatory step, as shown in FIG. 2, a ceramic product 10 (ceramic product before etching) formed by forming the coated glass layer 3 on the surface of the ceramic substrate 2 is prepared. Coated glass layer 3 of the present embodiment consists SiO ₂ -Al ₂ O ₃ -B ₂ O ₃ based glass, the ceramic substrate 2 is porcelain.

Next, in the pattern forming step, as shown in FIG. 3, an etching paste 4 formed by kneading an etching glass containing ₃ to 20 wt% of vanadium pentoxide (V ₂ O ₅ ) and an organic binder is used as a transfer paper 51. Then, a transfer pattern 41 is formed on the transfer paper 51.
Specifically, the etching glass of this example is SiO ₂ —Al ₂ O ₃ —B ₂ O ₃ —Li ₂ O—K ₂ O—ZrO ₂ —V ₂ O ₅ glass powder, and the organic binder is: An acrylic resin was used.

Further, the content of V ₂ O ₅ in the glass powder was 7.5 wt%, and the mixing ratio of the glass powder and the acrylic resin was equally divided (1: 1) by weight ratio. And what mixed glass powder and acrylic resin was knead | mixed with 3 rolls, and the etching paste 4 was obtained.
The transfer pattern 41 applied to the transfer paper 51 can be various decorative patterns, but the transfer pattern 41 of this example is etched on the edge portion (contour portion) of the design as shown in FIG. The pattern to which the paste 4 was applied was used.

Further, as shown in FIG. 3, in this example, the transfer pattern 41 is formed on the transfer paper 51 by using a screen printing method. That is, in this example, a plurality of openings 81 are formed in the screen plate 8 following the pattern of the transfer pattern 41. On the other hand, starch is applied to the surface of the transfer paper 51 so that the etching paste 4 forming the transfer pattern 41 can be easily peeled off from the transfer paper 51.
Then, the etching paste 4 disposed on the screen plate 8 is dropped onto the transfer paper 51 from the plurality of openings 81 to form a transfer pattern 41 on the surface of the transfer paper 51.
For example, a metal mask printing method can be used instead of the screen printing method.

  Next, as shown in FIG. 4, after drying the transfer pattern 41 on the transfer paper 51, an acrylic resin is applied to the surface of the transfer paper 51 in order to prevent the transfer pattern 41 on the transfer paper 51 from collapsing. 52 is applied, and the entire transfer pattern 41 on the surface of the transfer paper 51 is covered with an acrylic resin 52. In this example, the acrylic resin 52 is an acrylic resin film 52 for the entire transfer pattern 41 on the surface of the transfer paper 51.

  Next, as shown in FIGS. 5 and 6, in the pattern transfer step, the transfer pattern 41 is transferred from the transfer paper 51 to the coated glass layer 3 in the ceramic product 10, and the etching pattern 42 is applied to the coated glass layer 3. Form. In this example, the transfer pattern 41 in a state of being wrapped with an acrylic resin film 52 from the transfer paper 51 on which the transfer pattern 41 is formed using the water-attached slide transfer method is used. Then, an etching pattern 42 was formed.

Next, in the etching process, after the etching pattern 42 on the coated glass layer 3 in the ceramic product 10 is dried, the ceramic product 10 on which the etching pattern 42 is formed is heated and fired at a temperature of 850 to 950 ° C. I do.
In this example, the ceramic product 10 on which the etching pattern 42 was formed was placed in a firing furnace, and heated and fired at a temperature of 900 ° C. for about 15 minutes in the firing furnace.

  During this heating and baking, the etching pattern 42 is etched on the surface of the coated glass layer 3, and the etching paste 4 applied to the surface of the coated glass layer 3 forms the uneven pattern 7 on the surface of the coated glass layer 3. And integrated with the covering glass layer 3. Further, at the time of heating and baking, the acrylic resin film 52 evaporates from the surface of the etching pattern 42.

  Thus, as shown in FIGS. 1 and 7, the ceramic product 1 formed with the uneven pattern 4 can be manufactured. And the surface pattern in the uneven | corrugated pattern 7 of the formed covering glass layer 3 is formed adjacent to the flat pattern center part 71, the recessed part 72 formed in the both sides of this pattern center part 71, and the outer side of this recessed part 72. It was formed in the cross-sectional shape provided with the convex part 73 made. Moreover, the surface of the uneven | corrugated pattern 7 formed by etching became colorless and transparent.

  And the uneven | corrugated pattern 7 formed in the surface of the covering glass layer 3 does not produce elution or peeling in a part of glass which comprises the covering glass layer 3, but partially forms the glass which comprises the covering glass layer 3. It can be formed by moving. Therefore, it is possible to form a concavo-convex pattern 7 having a smooth surface without partially removing the covering glass layer 3. Further, the uneven pattern 7 can be formed in a glossy state.

Moreover, in this example, in order to perform the said etching, it is not necessary to mask partially, and it can etch simply by forming the etching pattern 42 in the covering glass layer 3. FIG. Therefore, the productivity of the ceramic product 1 can be improved.
Therefore, according to the etching method of this example, the smooth surface uneven pattern 7 can be formed without partially removing the covering glass layer 3, and the ceramic formed by forming the surface pattern by the uneven pattern 7. The product 1 can be manufactured efficiently.

  Although not shown, the etching paste 4 is directly applied to the coated glass layer 3 in the ceramic product 1 without being temporarily transferred to the transfer paper 51 as the transfer pattern 41 on the transfer paper 51. The etching pattern 42 can be directly formed on the substrate 3. Also in this case, the etching pattern 42 can be formed in the covering glass layer 3 in the ceramic product 10 by using a screen printing method or the like.

(Example 2)
As shown in FIG. 9, the ceramic product 1 </ b> A manufactured in this example has a colored pattern 75 colored with paint on the covering glass layer 3, and the uneven pattern 7 is formed as an outline of the colored pattern 75. It is a thing.
In this example, when etching is performed to form a surface pattern with the concavo-convex pattern 7 on the coated glass layer 3 in the ceramic product 10, the preparation step, the pattern formation step, and the pattern transfer step are performed as in the first embodiment. And an etching process.

In the pattern forming process of this example, as glass for etching, the glass powder of _{SiO 2 -Al 2 O 3 -B 2} O 3 -Li 2 O-K 2 O-ZrO 2 -V 2 O 5, SiO 2 - A powder mixture of Al ₂ O ₃ —B ₂ O ₃ —Li ₂ O—K ₂ O—ZrO ₂ with diluted glass powder was used. Further, the content of V ₂ O ₅ in the glass powder was 15 wt%, and the mixing ratio of the glass powder and the diluted glass powder was 8: 2 by weight ratio (with respect to 8 parts by weight of the glass powder, 2 parts by weight of diluted glass powder). And the mixing ratio of a powder mixture and acrylic resin was equally divided (1: 1), and what mixed these was knead | mixed with 3 rolls, and the etching paste 4 was obtained.

Further, in the pattern forming process of this example, as shown in FIG. 10, a ceramic paint paste 6 containing a color pigment and a resin is applied onto the transfer paper 51, and various kinds of paste are applied to the surface of the transfer paper 51. A colored pattern 61 for design transfer is formed.
In this example, the etching paste 4 is applied to the edge portion (contour portion) of the transfer coloring pattern 61 on the transfer paper 51 using a screen printing method or the like, and the transfer pattern is applied to the surface of the transfer paper 51. 41 is formed.

  Next, in the pattern transfer process of this example, as shown in FIG. 11, the transfer pattern 41 and the transfer coloring pattern 61 are transferred from the transfer paper 51 to the coated glass layer 3 in the ceramic product 10. Then, an etching pattern 42 by the transfer pattern 41 and a coloring pattern 62 by the transfer coloring pattern 61 are formed.

Thereafter, in the etching process of this example, the ceramic product 10 on which the etching pattern 42 and the colored pattern 62 are formed is placed in a firing furnace in the same manner as in Example 1 above, and the temperature is about 900 ° C. in the firing furnace. Heat baking was performed for 15 minutes.
Thus, as shown in FIG. 9, a colored pattern 75 formed by the colored pattern 62 is formed on the coated glass layer 3 in the ceramic product 10, and the pattern center portion 71, the concave portion 72, and the convex portion are formed as the outline of the colored pattern 75. The uneven | corrugated pattern 7 which has the cross-sectional shape provided with 73 was formed, and ceramic product 1A was manufactured.

In addition, also in this example, the configuration and the operational effects in each process are the same as those in the first embodiment.
Therefore, according to the etching method of this example, the uneven surface 7 having a smooth surface can be formed as the outline of the colored pattern 75, and the ceramic product 1A formed by forming the surface pattern by the colored pattern 75 and the uneven pattern 7 is obtained. It can be manufactured efficiently.

  The ceramic paint paste 6 and the etching paste 4 are applied directly to the coated glass layer 3 of the ceramic product 10 without being temporarily transferred to the transfer paper 51 as the transfer pattern 41 on the transfer paper 51, and this coated glass layer. The colored pattern 62 and the etching pattern 42 can be directly formed on the substrate 3.

(Comparative example)
This example is an example showing a conventional etching method in order to compare with the excellent effect of the etching method of the ceramic products 1 and 1A shown in Examples 1 and 2 as shown in FIGS. is there.
Also in this example, first, a ceramic product 10 before etching formed by forming the covering glass layer 3 on the surface of the ceramic substrate 2 is prepared (see FIG. 2 of Example 1).

  Then, as shown in FIG. 12, the surface of the coated glass layer 3 in the ceramic product 10 is masked with a masking tape 91 so as to obtain a desired pattern, and then the surface of the coated glass layer 3 as shown in FIG. A large number of alumina abrasive grains were sprayed from a spray gun. In this way, as shown in FIG. 14, a large number of depressions 93 were formed in the portion 92 that was not masked by the abrasive grains, whereby the desired pattern was etched to produce the ceramic product 9.

However, the surface of the coated glass layer 94 subjected to the etching was peeled off and partially removed, the surface smoothness deteriorated, and the glossiness of the surface disappeared.
From the above results, according to the etching method of the ceramic products 1 and 1A shown in Examples 1 and 2, the ceramic products 1 and 1A having the smooth surface uneven pattern 7 that could not be achieved by the conventional etching method. I found that it can be manufactured.

Sectional explanatory drawing which shows the ceramic product formed in the surface pattern by the uneven | corrugated pattern in Example 1. FIG. Sectional explanatory drawing which shows the state in which the coating glass layer was formed in the surface of the ceramic base material in Example 1. FIG. Sectional explanatory drawing which shows the state in which the transfer pattern by the etching paste was formed in the transfer paper in Example 1. FIG. Sectional explanatory drawing which shows the state which covered the whole pattern for transfer in the surface of the transfer paper in Example 1 with acrylic resin. Sectional explanatory drawing which shows the state which transfers the pattern for transcription | transfer from the transfer paper to a covering glass layer in Example 1. FIG. Sectional explanatory drawing which shows the state in which the etching pattern in Example 1 was formed in the covering glass layer. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective explanatory view showing a ceramic product formed with a surface pattern by a concavo-convex pattern in Example 1. FIG. 3 is an explanatory plan view showing a transfer pattern applied to transfer paper in Example 1. Sectional explanatory drawing which shows the ceramic product formed in the surface pattern by the uneven | corrugated pattern in Example 2 as the outline of a colored pattern. Sectional explanatory drawing which shows the state which formed the pattern for transfer and the coloring pattern for transfer in the transfer paper in Example 2. FIG. Cross-sectional explanatory drawing which shows the state which transferred the etching pattern and the coloring pattern in Example 2 to the covering glass layer. Cross-sectional explanatory drawing which shows the state which masked the surface of the coating glass layer in a comparative example. Cross-sectional explanatory drawing which shows the state which sprayed many alumina type abrasive grains on the surface of the coating glass layer in a comparative example. Cross-sectional explanatory drawing which shows the ceramic product in which the pattern by many depressions in the comparative example was formed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceramic product 2 Ceramic base material 3 Coating | coated glass layer 4 Etching paste 41 Transfer pattern 42 Etching pattern 51 Transfer paper 6 Paint paste for ceramics 61 Transfer coloring pattern 62 Coloring pattern 7 Concavity and convexity pattern 71 Pattern center 72 Concavity 73 Convex 75 Colored pattern

Claims (6)

A preparation step of preparing a ceramic product formed by forming a coated glass layer on the surface of the ceramic substrate;
A pattern forming step of applying an etching paste formed by kneading an etching glass containing 3 to 20 wt% of vanadium pentoxide and an organic binder to the transfer paper, and forming a transfer pattern on the transfer paper;
A pattern transfer step of transferring the transfer pattern from the transfer paper to the coated glass layer and forming an etching pattern on the coated glass layer;
A method for etching a ceramic product, comprising: an etching step in which the ceramic product on which the etching pattern is formed is heated and fired at a temperature of 850 to 950 ° C. to perform etching. In claim 1, in the pattern forming step, a transfer coloring pattern is formed on the transfer paper, and the transfer pattern is formed as an outline of the transfer coloring pattern.
In the pattern transfer step, the transfer pattern and the transfer coloring pattern are transferred from the transfer paper to the coating glass layer, and the etching pattern and the coloring pattern are formed on the coating glass layer. Etching method for ceramic products. A preparation step of preparing a ceramic product formed by forming a coated glass layer on the surface of the ceramic substrate;
A pattern forming step of applying an etching paste formed by kneading an etching glass containing 3 to 20 wt% of vanadium pentoxide and an organic binder to the coated glass layer, and forming an etching pattern on the coated glass layer;
An etching method for a ceramic product, comprising: an etching step in which the ceramic product on which the etching pattern is formed is heated and fired at a temperature of 850 to 950 ° C. to perform etching.   4. The method for etching a ceramic product according to claim 3, wherein, in the pattern forming step, a colored pattern is formed on the coated glass layer, and the etching pattern is formed as an outline of the colored pattern. A ceramic product comprising a ceramic substrate and a coated glass layer formed on the surface of the ceramic substrate, wherein the coated glass layer is formed with a concavo-convex pattern,
The concavo-convex pattern is formed by etching an etching glass containing vanadium pentoxide in an amount of 3 to 20 wt% on the basic glass constituting the coated glass layer,
The cross-sectional shape of the surface pattern in the concavo-convex pattern is formed by etching the etching glass to form a flat pattern central part, a concave part formed on both sides of the central part of the pattern, and an outer side of the concave part. A ceramic product comprising a convex portion.   6. The ceramic product according to claim 5, wherein the coated glass layer is provided with a colored pattern colored by a paint, and the uneven pattern is formed as an outline of the colored pattern.

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