JP2015202984A - Manufacturing method of ornamental board of oya tuff stone, and the ornamental board of oya tuff stone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of an ornamental board of Oya tuff stone, capable of obtaining a finished product in a short time by painting on and firing a board of Oya tuff stone containing miso (brown specks of clay mineral).SOLUTION: An Oya tuff stone including miso is cut into boards with a thickness of 5 mm to 15 mm. The front face and the rear face of the board of Oya tuff stone obtained is applied with a transparent glaze for Raku pottery. The entire is fired at a temperature of about 800°C to 1000°C for 10 minutes to 20 minutes in a kiln, and then cooled down to normal temperature. A pattern in which the miso is incorporated is drawn on the front face of the Oya tuff stone with a colored glaze for Raku pottery. The entire is fired at a temperature of about 800°C to 1000°C for 10 minutes to 20 minutes in a kiln, and then cooled down to normal temperature. The pattern is modified with a colored glaze for Raku pottery and subjected to firing at a temperature of about 800°C to 1000°C for 10 minutes to 20 minutes in a kiln, which is repeated until completion of the pattern. Finally the board is cooled down to normal temperature, so that an ornamental board of Oya tuff stone is obtained, making the best use of the natural miso in the pattern.

Description

  The present invention relates to a method for producing a painted Oya stone decorative plate, and an Oya stone decorative plate manufactured by the method.

  Oya stone, which is the raw material of the present invention, is a tuff-based stone material, and in particular, it is used as a building material for walls, walls, etc. because it contains a portion called “miso” of a brown clay mineral in the form of spots. However, it is hardly used for other purposes.

On the other hand, with regard to the use of natural stone materials, the “natural stone material surface treatment method and natural stone material subjected to surface treatment” in the following Patent Document 1 is a thin plate-like natural stone material having a thickness of about 15 mm, taking andesite as an example. It is described that it is colored with glaze and baked at a selected temperature of 500 ° C. to 1300 ° C. to make a decorative board on which a glassy film is formed.
Further, the “fired stone material” of Patent Document 2 described below describes that a stone material having a thickness of 10 mm is fired at 700 ° C. to 1200 ° C. with a glaze applied thereto, for example, granite.

Andesite and granite used in the above-mentioned patent documents have a fine and hard surface, so that the surface can be processed uniformly and smoothly. For this reason, these natural stone materials can be decorated by freely drawing patterns on the plate surface. It is suitable for applying.
However, Otani stone tends to break when processed into a plate shape, and since many “miso” are included in the background, a fine pattern cannot be drawn on the plate surface.

  On the other hand, potteries that produce ceramics have a production experience corner for ceramic products. Here, customers can experience the production experience of turning containers to make containers from clay and painting them. Has been done. This service allows you to experience various production processes, such as the formation of pottery using locro, but the experience of painting the pottery with glaze is particularly popular because customers can freely draw patterns according to their own preferences. It is effective in attracting customers.

JP-A-6-144554 JP2008-120661

The inventor has been hard at creating consumption of locally produced Otani stone, and has therefore developed and prototyped new products.
The idea was to increase the consumption of Otani stone by taking inspiration from the ceramic pottery production experience corner and painting on Otani stone to provide an experience of making ornaments.

In the production experience with ceramics, the product cannot be completed unless it is fired in a kiln over time after drawing on a container etc., so the drawn work can not be handed to the place where it was produced directly, and the experience customer For the first time in a few days, the finished product will be brought into contact with his work, which is colored by glaze. Therefore, there is a frustration in the meantime for the experience customer, while the production instructor cannot see the pleasure of the experience customer.
In addition, during the experience production, the experience customer often fails to draw, and once it fails, there is a problem that it cannot be rewritten and the failed work is delivered to the person himself.

The present inventor who has noticed the above problem can use the Oya stone instead of the ceramics for painting, so that the work drawn by the customer can be completed in a short time and delivered immediately to the place where the customer has made it. If possible, the experience customer can get the finished product before the impression of the production experience cools down, and the impression is doubled, while the production instructor can see the customer's joy directly.
However, until now, as in the above-mentioned patent document, although there is a technique for applying a glaze to fine andesite and granite with fine surface texture and glaze, it has a rough background with brown "miso" There was no technology to produce thin decorative pieces using brittle and easily broken Oya stone.

  Therefore, the present invention makes it difficult to break the Oya stone including the miso processed into a thin plate, and the impression of the production experience does not cool down in the place where the production experience customer who painted the pattern on the Oya stone plate produced it. It is an object of the present invention to provide a method for producing a decorative plate made of Otani stone that can receive a finished product, and a decorative plate made of Otani stone with a natural flavor that contains only the unique Otani stone obtained by the method.

  In order to solve the above-mentioned problem, the invention of claim 1 of the present invention is a method for producing a decorative plate made of Oya stone, and cuts Oya stone including miso into a plate having a thickness of 5 mm to 15 mm, and the obtained Oya stone plate Apply transparent glazing for easy baking on the front and back surfaces, fire the whole at a temperature of about 800 ° C to 1000 ° C, then cool to room temperature, and design the miso portion on the surface of the Otani stone plate with a color glaze for easy baking. The whole is fired at a temperature of about 800 ° C. to 1000 ° C. by drawing a pattern taken in, and this is cooled to room temperature to obtain a decorative plate made of Oya stone.

  Claim 2 is an invention of a method for producing a decorative plate made of Oya stone, and cut Oya stone including miso into a plate having a thickness of 5 mm to 15 mm, and transparent glazing for easy baking on the surface and the back surface of the obtained Oya stone plate. Apply and bake the whole at a temperature of about 800 ° C to 1000 ° C, then cool to room temperature, draw a pattern with a glaze for easy baking on the surface of the Oya stone plate, and a temperature of about 800 ° C to 1000 ° C Bake the whole, then cool it at room temperature and repeat the firing at a temperature of about 800 ° C to 1000 ° C while correcting the pattern with the miso portion taken into the pattern with the easy-to-use color glaze until the pattern is completed Finally, it is cooled at room temperature to obtain a decorative plate made of Oya stone.

  Claim 3 is a decorative plate made of Otani stone manufactured by the method according to claim 1 or 2, wherein a pattern in which miso is incorporated into a base material in which a black part is included in a spot shape on a white base material. Characterized by painting.

In the present invention, a thin Oya stone plate of 5 mm to 15 mm which is brittle and easily damaged including miso is fired by applying a transparent flame for easy baking, and at that time, a water-soluble transparent applied to the entire plate surface of Oya stone The soot accumulates in the hollowed portions, penetrates more into the voids between the particles than other portions, and the firing temperature is about 800 ° C. to 1000 ° C. The permeated transparent soot is melted at a high temperature, and the portion thereof is strengthened by vitrification after cooling. Further, the surface of the entire stone base other than the miso portion is strengthened by the transparent soot.
In addition, by setting the firing temperature to about 800 ° C to 1000 ° C, the adhesive strength between the stone-based particles is enhanced and baked to strengthen Oya stone from the inside, and the strength is a decorative product. It is possible to increase the strength required for
In addition, since the firing temperature does not exceed 1000 ° C. during the firing, the Oya stone plate is prevented from being bent and deformed due to the softening of the Oya stone particles by melting, and the flatness is maintained.

  The base of the Otani stone board that has been coated and fired with this transparent glaze is white, and the brown-colored “miso” portion appears black and appears in spots, with a black and white texture that is not colored like a canvas on a painting It can be obtained in its natural state. Painted on the surface of this Otani stone plate with a color glaze for easy firing that draws miso into the pattern, and when fired at a temperature of about 800 ° C to 1000 ° C, the color glaze develops and the stone material It is melted on the surface of the glass and solidified into a glassy state by being cooled.

The firing time of the thin Oya stone plate is very short, about 30 minutes or less, and it can be cooled in a short time of about 10 to 20 minutes at room temperature after it is taken out of the firing kiln. An extremely short time can be achieved.
For this reason, it is possible to complete the work drawn by the production experience customer who visited the production experience corner during the production day, and the finished product can be immediately handed over to the production experience customer, and the experience customer doubles the impression. The leaders can also enjoy the production guidance by seeing the joy.
The produced work will be a decorative product full of natural beauty, utilizing a pattern that incorporates a rough chin that contains the “miso” unique to Otani stone.

In the invention of claim 2, in the painting work on the surface of the Otani stone plate including miso, it can be corrected and redrawn over and over again in a short time on a base made of clear glaze with easy-to-use color glaze. So, even if you are a beginner, if you fail to capture the pattern that you drew in the design, or if you are not satisfied, repeat the drawing and baking to correct the coloring state as many times as you like, and correct the miso Although it is included, it is possible to finish it into a more satisfying work with a high degree of completion.
Finally, the work can be completed on the day of production, and can be immediately appreciated by the hand.

In the invention of claim 3, the Oya stone plate as thin as 5 to 15 mm including miso calcined at a temperature of about 800 ° C. to 1000 ° C. is baked flat without distortion as a decorative product by the glaze applied. Otani gives viewers a colored pattern freely expressed by embedding miso into a pattern with a color glaze for easy firing on the base where the necessary strength is expressed and spotted `` miso '' appears black in the white stone base In harmony with the surface of the stone, it gives an impression full of natural beauty.
In addition, while ordinary stones such as andesite give a hard and cold feeling, Oya stones that have a black and white surface and have a rough rough surface feel softness and warmth, and glaze that develops color in it. Together with this pattern, the design is utilized to express harmonious natural beauty.

It is a flowchart which shows the manufacturing process of this invention. It is a flowchart which shows the manufacturing process of another form. The perspective view (b) of the Oya stone decorative plate of the present invention (b) viewed from the front is a perspective view viewed from the back with the string attached. It is the perspective view seen from the front which shows the Oya stone decoration board which equipped with the decoration frame. It is the perspective view seen from the front which shows the decorative plate made from Oya stone which backed the cork board. BRIEF DESCRIPTION OF THE DRAWINGS It is each perspective view which shows the manufacturing process of this invention in order, (i) shows Oya stone of a raw material, (b) shows the processed Otani stone board, and (C) shows the state which has coated Oya stone board with a transparent fence. . (D) is a longitudinal side view showing the baking process, and (e) is a perspective view showing the painting process. (F) is a longitudinal side view showing a correction baking process, and (g) is a perspective view showing a painting process. (H) is a longitudinal side view showing the final baking process, and (I) is a perspective view showing the finished product after the cooling process.

  Otani stone, which is the raw material of the present invention, is a tuff stone material produced mainly in the Otani area of Utsunomiya City, Tochigi Prefecture, and formed by solidification of volcanic ash and pumice-containing volcanic ash materials deposited in the sea. The components include 66% silicic acid, 12% aluminum oxide, 1.85% ferric oxide and the like. And its stone base contains a large amount of pumice glass, plagioclase, quartz and a small amount of biotite amphibolite pyroxene. The color tone is white, and the soft base is so easy to collapse that it can be scraped with nails called `` Miso '' of clay minerals including brownish brown zeolite, montmorillonite etc. in a stone base containing light brown, pale green and blue colors Included in spots.

  The present invention is a method for manufacturing a decorative plate made of Otani stone using the Oya stone including the above-mentioned miso, and a decorative plate made of Otani stone manufactured by the manufacturing method. First, an embodiment of the manufacturing method will be described.

  As shown in the manufacturing process (1) of FIG. 1, the present invention includes a plate shaping step of cutting out the Oya stone containing the above-mentioned miso as a raw material into a plate having a thickness of 5 mm to 15 mm, and an ootani containing the miso obtained by the cutting. An undercoating step of applying transparent glazing for easy firing on the front and back surfaces of the stone plate, an undercoating step of firing this at a temperature of about 800 ° C. to 1000 ° C., and a cooling step of cooling the fired Oya stone plate to room temperature , A painting process of drawing a pattern on the surface of the cooled Otani stone plate with a glaze for easy baking, a baking process for baking this at a temperature of about 800 ° C to 1000 ° C, and a baked Otani The manufacturing is completed by sequentially performing a cooling process for cooling the stone plate to room temperature.

Further, as shown in the manufacturing step (2) of FIG. 2, the other form has a step of correcting the pattern once drawn following the manufacturing step (1) of FIG.
The process includes an initial painting process of drawing a pattern in which miso is taken into the design with a color glaze for easy baking on the surface of the Oya stone plate through the cooling process after the lower baking process in FIG. A baking step of baking at a temperature of ˜1000 ° C.
Then, through a cooling process that cools the fired Oya stone plate to room temperature, a modified painting process that draws a pattern in which miso is taken into the design with a glaze for easy firing on the surface of the Oya stone plate again, and this is about 800 ° C. It has the process of repeating until the pattern which the miso which correct | amended each process of the correction baking process baked at the temperature of -1000 degreeC, and the cooling process which cools the baked Oya stone to normal temperature was taken in in a design is completed.
Then, after the pattern is completed in the above process, the final correction baking process is performed, and then the Oya stone plate on which the design is utilized and the natural beauty is expressed is fired.

The form of the manufacturing steps (1) and (2) will be described in more detail with reference to another drawing.
First, the form of the manufacturing process (1) will be described.
In this form, the Oya stone including the miso used can be a rectangular parallelepiped Otani stone cut out from a quarry or a relatively large piece generated when processed into a building material as it is as a raw material of the present invention.
For example, as shown in FIG. 6B, the Oya stone 9 containing the groove 3 as a raw material shown in FIG. 6A is cut into a plate having a thickness of 5 mm to 15 mm with a stone cutter.
When the Oya stone plate after cutting is not washed, the stone-based powder remains attached to the surface of the plate, but it can be used as it is after removing large dirt.
The size of the plate surface is about 10 cm in length and width to about 50 cm in length and width, which is optimal for carrying around, but the size is not particularly limited.

The plate thickness is 5 mm to 15 mm, but if the plate thickness is 4 mm or less, it is too thin to improve the strength by baking with the glaze described below, and the base material of Oya stone that originally contains the brittle miso 3 is easy. Since it breaks, it is not suitable as a product. In addition, when the plate thickness is 16 mm or more, the entire Oya stone plate cannot be uniformly fired in a short time when the temperature in the firing kiln described below is fired at 800 ° C. to 1000 ° C. There is a risk of uneven baking.
In addition, when the plate thickness is 20 mm or more, it is not preferable as a product because it is used as a decorative ornament hung on the wall or is too heavy to carry.
For this reason, an Oya stone plate including a groove 3 having a thickness of 10 mm, a length of 25 cm, and a width of 20 cm will be described below as an example.

As shown in FIG. 6 (a), the Oya stone 9 containing 3 raw materials is soft and brown in the stone base 2 containing light brown, light blue, etc., based on white on the plate surface. Clay-like ridges 3 are present in spots.
The surface is very rough with unevenness like solidified volcanic ash, and some of the three miso parts have dents 4.

The Oya stone 9 including the raw material 3 is cut into a thickness of 10 mm, a length of 25 cm, and a width of 20 cm to obtain the Oya stone plate 1 shown in FIG.
The plate surface of the Otani stone plate 1 has a soft clay-like miso 3 in a brownish color in a stone base 2 containing light brown or light blue based on white, and the ground surface of the flat surface is flat. Some of the rough large three miso portions are missing the central portion, resulting in a depression 4.

  Next, as shown in FIG. 6C, the Oya stone plate 1 including the miso 3 obtained in the plate shaping step is melted in water with transparent glazing 5 for easy baking on the front surface 1a and the back surface 1b. Apply with 10,

“Raku-yaki” is a method for producing ceramics on a small scale, and the firing temperature of the glaze used for this is usually about 750 ° C. to 850 ° C.
This glaze for easy baking includes a transparent glaze that becomes transparent after firing and a color glaze that develops color after firing.

In the undercoating step of the present invention, the transparent glaze 5 for easy baking is used. The transparent glaze 5 is used by dissolving the raw material powder in water, and the blending amount of the transparent glaze and water is 5 parts by weight of the transparent glaze. The water is mixed in a ratio of 5 to 3 parts by weight.

Then, the transparent wrinkle 5 that has become milky white when dissolved in water is applied to the entire surface 1a and back surface 1b of the Oya stone plate 1 including the miso 3 with the brush 10. Then, the applied transparent glaze 5 soaks into the ground from the surface of the stone base 2 and the miso 3 of the Oya stone with the small holes.
At this time, especially in the miso 3 portion, the transparent ridge 5 accumulates in the recess 4 and penetrates more into the small holes than in the other portions.
In this undercoating step, it is preferable to apply a glaze 20 for confirming the firing temperature of 800 ° C., which is white and melts at 800 ° C. to develop black, so that the corner of the Oya stone plate does not stand out. This is for confirming that the firing temperature is 800 ° C.

Next, as shown in (2) of FIG. 7, the Oya stone plate 1 including the miso coated with the transparent bowl 5 is placed in the firing kiln 7 and arranged on the firing table 8, and is about 800 ° C. to 1000 ° C. Bake at a temperature of about 10 to 20 minutes.
This firing is performed to increase the strength of a thin plate of 5 to 15 mm that is brittle and easy to break, including miso, to the strength required for decorative products.
The water-soluble transparent glaze applied to the entire surface of the Otani stone is recessed and accumulates more in that part, and penetrates more inside the transparent glaze scissors than other parts, but the transparent glaze is about 800 It melts by firing at a temperature of from ° C to 1000 ° C and vitrifies after cooling to increase the strength. At the same time, the surface of the entire stone base other than the miso portion is also reinforced by the transparent wrinkles.
At the same time, by setting the firing temperature to about 800 ° C. to 1000 ° C., the adhesive strength between the stone-based particles is enhanced and baked to strengthen Otani stone from the inside.

In this firing, since the firing temperature is 1000 ° C. or less, the bonding of the composition particles of Otani stone is increased, but it does not reach melting, and as a result, the bending deformation of the plate surface due to softening is prevented and the planarity is improved. The retained Oya stone plate is obtained.
At this time, when the firing temperature is raised to 1200 ° C. to 1300 ° C., components such as metal and glass contained in Oya stone are melted, and the strength as a stone material is lost. It becomes impossible to maintain the planar shape and causes a large bending deformation. For this reason, in this calcination process, the firing temperature is set to 1000 ° C. or lower in order to maintain the flatness of the plate.
The firing kiln 7 can be an electric kiln, gas kiln, kerosene kiln or the like for easy firing. Confirmation of the firing temperature inside the firing furnace 6 can be carried out by placing a Zegel cone in the furnace.
In the baking kiln 7, the transparent straw 5 is melted at a set temperature of 800 ° C., and the Oya stone plate including the miso is baked so that it shines red, but it is sufficiently baked until the red-burned portion spreads over the entire surface.

Next, the Oya stone plate 1 is taken out from the firing kiln 7 and naturally cooled to room temperature. Since the plate thickness is as thin as 10 mm, the Oya stone plate including the miso is cooled quickly, and naturally cools to about room temperature in about 20-30 minutes.
In the production of general ceramics, if it cools rapidly, it shrinks and cracks. To avoid this, the cooling time is taken over 1-2 days, and the product is carefully taken out from the kiln. Since the stone plate is an igneous rock, it does not shrink and does not break even if it is cooled rapidly in a short time.

The transparent trough 5a applied to the Oya stone plate 1 including the miso cooled in the cooling step and baked becomes a glossy glass state and solidifies and settles on the front surface 1a and the back surface 1b, and the stone base 2 portion is almost the same. The portion of the miso 3 that has become white and has a patchy brown color is colored black, and the background pattern in a state of being decolored to black and white can be obtained in a natural state like a canvas of a painting.
In addition, the material strength of the Oya stone plate 1 including the soft and brittle miso is increased, and it is not easily broken even when hit.

Next, as shown in FIG. 7E, painting is performed on the surface 1a of the Oya stone plate 1 including the miso.
In this painting process, the glaze for painting uses a glaze 6 for easy baking that produces various colors such as red and green that melt at 800 ° C. to 900 ° C. on the market. In many cases, the color glaze 6 is greatly different from the color when it is applied and the color after color development.
Then, using the glaze 6, a flower pattern 12 in which the miso 3 is incorporated into the design as leaves and stems is drawn on the plate surface with the brush 11 as shown in FIG. Since the surface 1a of the Otani stone plate 1 has already been baked transparent ridges 5a, it is easy to draw with the brush 11.
In addition, (e) of FIG. 7 shows the Oya stone board 14 with the said flower pattern 12, and shows the state by which the baked flower pattern 12a was drawn.
Also, in this painting process, the raw material color is white and melts at 900 ° C. and turns black, and the baking temperature 900 ° C. confirmation glaze 21 is blackened at the corner of the Otani stone plate 1 so that it is not camouflaged. It is good to paint on. This is a measure for knowing that the firing temperature has reached 900 ° C. in the next baking step.

After the painting step, as shown in FIG. 8 (f), the Oya stone plate 1 containing miso is fired in a firing kiln 7 so as to melt the glaze 6 at a temperature of 800 ° C. to 1000 ° C.
Although the Oya stone plate 1 including the miso is baked so as to shine red, the glaze 6 is sufficiently baked until the red-baked portion spreads over the entire surface. The time is about 10-20 minutes.
This firing temperature is also not preferable at a temperature of 1200 ° C. or higher because the stone base component of the Oya stone plate containing fragile miso is melted and the flat shape of the plate cannot be maintained, causing a curved deformation.
And after baking, when it takes out from the baking kiln 7 and naturally cools at room temperature for about 20 minutes, the baking decorative plate made from a fired Oya stone which the fired glaze 6a fixed to the surface 1a is completed.

Next, the form of the manufacturing process (2) shown in the flowchart of FIG. 2 will be described.
This form has a process of correcting the pattern 12 once drawn, and the first process is the same procedure as the plate shaping process, undercoating process, undercoating process, and cooling process in the manufacturing process (1) of FIG. Subsequent steps are added from the attaching step.

  In the painting process, as shown in the production process (2) of FIG. 2, the first painting process, the second and subsequent painting processes, and the final painting process are provided. May not be done.

The process will be described below.
In the first painting process, as shown in FIG. 7 (e), a color glaze 6 for easy baking is applied to the surface 1a of the Otani stone plate 1 including the miso on which the transparent glaze 5a is fixed with the brush 11 as a design. The taken flower pattern 12 is drawn, and the whole is baked in a baking kiln 7 for 10 to 20 minutes at a temperature of about 800 ° C. to 1000 ° C. as shown in FIG.
And after baking, it takes out from the baking kiln 7, and cools to normal temperature.

Further, as shown in FIG. 8G, a flower pattern 13 in which the miso is taken into the design with the brush 11 is added to the surface 1a of the Otani stone plate 1 including the miso, or is baked. A modified pattern 13 is drawn on the fired pattern 12a of the fixed color glaze 6a while being corrected with another color glaze 6, and a temperature of about 800 ° C. to 1000 ° C. is drawn as shown in FIG. Bake for 10 to 20 minutes.
Then, this process is repeated until the baked modified pattern 13a is completed. Finally, as shown in FIG. 8 (i), the process is sufficiently performed at a temperature of about 800 ° C. to 1000 ° C. for 15 minutes to 30 minutes. After firing, this is cooled to room temperature, and the production of the decorative plate made of Oya stone, which is the Oya stone plate 15 with the modified pattern on which the modified fired pattern 13a in which the pattern is utilized, is completed.
As described above, the manufacturing process of the Oya stone decorative plate is completed in a short time.

Next, the production process (2) will be described in which the production experience customer performs the production of the decorative plate made of Otani stone according to the present invention under the production instructor.
Production of the decorative plate made of Otani stone according to the present invention includes a case where all the production processes are experienced, a case where all the processes using glaze are experienced, and a case where a painting process is experienced.

Of these, in the production process (2), the case of experiencing the painting process shown in <the process performed by the production experience customer> will be described as an example.
In this case, the pre-baking process shown in (2) of FIG. 7 already performed by the production experience provider is completed, and after the cooling process, the plate is hard to break due to the enhancement of the surface strength of the transparent bowl 3. Provide Otani stone board 1 to production experience customers.

As shown in FIG. 7E, the production experience customer draws the first pattern 12 with the brush 11 on the surface 1a of the Otani stone plate 1 including the miso to which the transparent glaze 5a is fixed, with a brush 11. As shown in (f) of FIG. 8, the whole is fired at a temperature of about 800 ° C. to 1000 ° C. in a firing furnace 7 for 10 minutes to 20 minutes.
And after baking, it takes out from the baking kiln 7, and cools to normal temperature over 20 minutes-30 minutes.

Next, as shown in FIG. 8 (G), the glaze glaze is applied to the surface 1a with a brush 11 and a modified pattern 13 in which the pattern is utilized only for the second and subsequent times with the glaze 6 for easy baking. While further correcting with the glaze 6 on the fired pattern 12a of 6a, firing is performed at a temperature of about 800 ° C. to 1000 ° C. for 10 minutes to 20 minutes as shown in FIG.
Then, this process is repeated until the modified pattern 13 is seen and the design is utilized, and finally, as shown in FIG. 8 (i), at a temperature of about 800 ° C. to 1000 ° C. for 15 minutes. After firing sufficiently for 30 minutes, this is cooled to room temperature, and as shown in FIG. 3 (a), the production of the decorative plate made of Otani stone in which the pattern is utilized in the pattern is completed.
As described above, the manufacturing process of the Oya stone decorative plate is completed in a short time.
That is, the production experience customer can paint the surface 1a of the Otani stone plate 1 and bake it, cool it, and check the pattern he drew.
The time from the start of production until the work can be taken home is as short as several hours, and the produced work can be taken home as it is.

Next, the painted Oya stone decorative board obtained by the above manufacturing method will be described.
The stone base of the Oya stone, which contains the raw material, is very brittle and has a soft spotted “miso”. The miso is scattered over a part of the stone base, and the depressions 4 and cavities are in the miso. Some have occurred. For this reason, when it is processed into a thin plate having a thickness of 5 mm to 15 mm, there is a portion where the strength is extremely lowered due to the presence of the “miso” portion, and the portion easily breaks even with a small impact.
In the present invention, a thin Oya stone plate that contains such miso and is easy to break is soaked with transparent soot on the surface and baked at a high temperature of 800 ° C. so that the molten glaze is a small hole in the stone base of Oya stone. The strength is increased by entering the hollow and solidifying into a glass. By performing the treatment for increasing the strength in this way, it becomes possible to prevent damage accidents during the manufacturing process or during carrying.
In addition, the glaze layer formed on the surface allows the powder adhering to the surface to be trapped in the glaze and solidified, preventing contamination during drawing, and smoothing the plate surface as more shine occurs. In addition, when painting on this surface, glaze is included so that the brush can be carried smoothly and a pattern can be drawn freely.

  And as shown to (a) and (b) of FIG. 3, the ground of the foundation | substrate is permeate | transmitted from the transparent glaze 5 to the surface 1a and back surface 1b, and the side part 1c of the Oya stone board 1, and the surface 1a and back surface 1b Is white in its entirety, and black spotted ridges 3 appear naturally as a texture unique to Otani stone, giving it a warm and soft texture, especially the ridges of the ridges that remain black, with Oya stone at a glance. As shown in FIG. 3 (a), the substrate 12 is filled with a natural feeling that can be understood as being present, and the pattern 12 drawn on the surface 1a of the Oya stone plate 1 of this substrate and incorporating the colored pattern 12 is black. Rather than concealing the part of “Miso” 3, for example, as shown in FIG. 3 (a), the natural and artificial nature of the flower pattern 12 is the presence of the stem and leaves. A unique and tasteful atmosphere that is fused and united is created.

In addition, as shown in FIG. 5, the appearance as a decoration can be arranged by sticking paper and the cork board 16 on the back surface 1b of this Oya stone plate, and binding the back surface.
Also, as shown in FIG. 4, by providing a decorative frame 17 around the Oya stone decorative plate 1, the appearance for hanging the wall is arranged, and the product is given a high-class feeling. FIG. 4 shows a state in which the pattern of the miso 3 connects all the star patterns 12, and shows that the miso 3 is utilized by being used as a star connecting pattern.
In order to make use of the natural background of Oya stone including miso as it is, as shown in FIG. 3 (b), a hanging hole 18 is opened on the upper part, and a hanging string 19 is hung on the hanging hole 18 to positively A mode is possible in which the texture of the stone is shown so that the miso 3 can be seen on the side surface 1c of the stone plate 1 and is suspended from the wall.

  The decorative plate made of Otani stone obtained by the above production method of the present invention can be hung on the wall surface one by one, or a large number can be attached to the wall surface such as tiled to decorate the entire wall surface.

1 Otani stone plate 1a Otani stone plate surface 1b Otani stone plate back surface 1c Otani stone plate side 2 stone base 3 miso 4 dent 5 water-soluble transparent glaze 5a fired clear glaze 6 water-coloured glaze 6a calcined color glaze 7 calcining kiln 8 calcining table 9 raw material Otani Stone 10 Brush 11 Brush 12 Pattern 12a Firing Pattern 13 Modified Pattern 13a Modified Firing Pattern 14 Patterned Otani Stone Board 15 Patterned Otani Stone Board 16 Cork Board 17 Decoration Frame 18 String Hole 19 Suspension String 20 Grain for Confirming the Firing Temperature 800 ° C 21 Glaze for confirmation of firing temperature 900 ° C

Claims (3)

  Oya stone containing miso is cut into a plate with a thickness of 5 mm to 15 mm, and a transparent roast for easy baking is applied to the front and back surfaces of the obtained Oya stone plate, and the whole is baked at a temperature of about 800 ° C. to 1000 ° C. After that, it is cooled to room temperature, and the whole is baked at a temperature of about 800 ° C. to 1000 ° C. by drawing a pattern in which the miso portion is taken into the design with a color glaze for easy baking on the surface of the Otani stone plate. A method for producing an Oya stone decorative board characterized by obtaining an Oya stone decorative board. Oya stone containing miso is cut into a plate with a thickness of 5 mm to 15 mm, and a transparent roast for easy baking is applied to the front and back surfaces of the obtained Oya stone plate, and the whole is baked at a temperature of about 800 ° C. to 1000 ° C. Then, it is cooled to room temperature, and the whole is baked at a temperature of about 800 ° C. to 1000 ° C. on the surface of the Otani stone plate, drawing a pattern in which miso is taken into the design with a glaze for easy baking.
After that, it is cooled at room temperature and the pattern is corrected with a glaze for easy baking, and firing at a temperature of about 800 ° C. to 1000 ° C. is repeated until the pattern is completed,
A method for producing a decorative plate made of Oya stone, which is finally cooled at room temperature to obtain a decorative plate made of Oya stone. A decorative plate made of Otani stone manufactured by the method according to claim 1 or 3, wherein a pattern in which miso is taken into a pattern on a white base with black spots on the base is painted. Oya stone decorative board characterized by