JP2002068863A - Method of manufacturing decorated pottery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing decorated pottery which facilitates decorating of hand drawn patterns as desired. SOLUTION: A colored layer 12 is formed by a coloring implement formed by dispersing the powder of colored glaze previously color developed by firing into a solid or liquid dispersion medium onto the surface of a ground surface layer 10 of a transfer sheet 2 peelably provided with the ground surface layer 10 on a base material layer 4 and the decorated pottery is manufactured by using such pottery. This manufacturing method comprises the steps of separating the laminate of the ground surface layer 10 and the colored layer 12 from the base material layer 4; placing this laminate on the glazed surface of the previously smoothed pottery; and fixing the colored glaze of the colored layer 12 to the surface of the pottery after removing the dispersion media of the ground surface layer 10 and the colored layer 12 of the laminate by firing the pottery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a painted ceramic in which a picture pattern is provided on a ceramic plate or the like.

[0002]

2. Description of the Related Art Heretofore, when a hand-painted pattern is applied to ceramics, it has been common practice to paint the surface of the unglazed ceramics with a paint and then fire.

[0003]

However, the above-mentioned method is carried out exclusively by a specialized porcelain manufacturer, and has the following problems for those who are not skilled in work.

[0004] That is, the work of drawing directly on the surface of ceramics is intuitively different from the case of drawing on a drawing paper or a canvas, and it is difficult to draw as desired. In addition, there is also a problem that the brushstroke and color tone at the time of painting are changed at the time of firing, and a finished product as imaged cannot be obtained.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of manufacturing a painted ceramic which can easily paint a hand-drawn pattern as desired.

[0006]

The object of the present invention is to provide a transfer sheet in which a base layer is provided on a base layer so that the base layer can be peeled off. A method for painting a ceramic using a colored tool formed by dispersing a powder in a solid or liquid dispersion medium, and painting the ceramic layer, wherein the base layer and the colored layer are laminated on the base layer. A second step of placing the laminate on a pre-smoothed glazed surface of porcelain; and firing the porcelain to form the underlayer and the coloring in the laminate. A third step of removing the dispersion medium of the layer and fixing the color glaze of the colored layer on the surface of the porcelain.

In the first step, it is preferable that after covering the surface of the colored layer with a protective layer, the laminate including the protective layer is separated from the base material layer.
It is preferable that the protective layer is removed together with the dispersion medium of the underlayer and the colored layer in the laminate by firing the ceramic.

The average surface roughness Ra on the surface of the underlayer is preferably 0.3 to 60 μm, and the average surface roughness Ra on the glazed surface of the porcelain is 0 to 0.1 μm.
It is preferably 3 μm.

The ceramic is preferably flat, and the dispersion medium is preferably composed mainly of a waxy substance.

Further, the firing temperature of the porcelain in the third step is preferably 1000 to 1300 ° C., and the firing time is preferably 2 to 8 hours.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram for explaining a method of manufacturing a painted ceramic according to the present invention.
FIG. 4A is a cross-sectional view illustrating a state in which a colored layer forming a desired picture pattern is formed on a transfer sheet, and FIG. 4B is a cross-sectional view illustrating a state in which a laminate is placed on a ceramic.

As shown in FIG. 1A, the transfer sheet 2
A release layer 6 and an adhesive layer 8
The underlayer 10 is provided through the substrate. Release layer 6
Can be formed by applying a known release agent or release agent. The adhesive layer 8 is formed from a water-soluble glue such as dextrin, but is not particularly limited. For example, the adhesive layer 8 may be formed from an acrylic adhesive or a rubber adhesive.

It is preferable that the underlayer 10 has a small water repellency and a rough surface to some extent so that a colored layer can be easily formed by a coloring tool described later. Specifically, it is preferable to use one having a center line average surface roughness Ra of the surface of the underlayer 10 in the range of 0.3 to 60 μm, and more preferably in the range of 1 to 10 μm.

The material of the underlayer 10 is preferably one that is not decomposed and removed at the time of baking to leave ash, or only ash of substantially the same color (for example, white) as the color of the ceramic to be painted remains. Examples of materials having such properties include media, resin films such as polyester and polyurethane, and paper materials such as coated paper. As the medium, any of an aqueous medium such as gelatin and shellac, and an oily medium such as paraffin and tristearin can be used, but an oily medium can be preferably used. Other specific examples of media include:
Arabic gum, rosin, rosin ester, ethyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, polyisobutene, polybutadiene, starch, modified starch, silicone oil, screen oil, etc. May be. The formation of the underlayer 10 made of medium can be performed by any means such as screen printing, spray coating, roller coating, doctor blading, and attachment of a medium film. Spray coating or 100-400 mesh (more preferably 150
Screen printing using a screen plate of about 350 mesh) is preferred.

As a coloring tool for forming the coloring layer 12 on the surface of the underlayer 10, a coloring tool in which a color glaze powder is dispersed in a solid or liquid dispersion medium can be used. The color glaze is made of a mixture of a frit and a pigment, and preferably has a weight ratio of the frit to the pigment of about 1: 3 to 3: 1.
If the frit is too small, the fixation of the pigment tends to be insufficient, and if the frit is too large, the coloring tends to be unclear.

As the frit, for example, raw materials such as quartzite, borax, lead, feldspar, and alkali metal compounds are mixed.
Silicon, boron, lead, alkali metal,
Oxides such as aluminum, calcium, magnesium, zinc, and zirconium can be used. For example, commercially available frit for glaze can be preferably used.

As the pigment, it is preferable to use a pigment which has been calcined in advance so as to develop a color. Therefore, even if the ceramic is calcined after drawing, the color tone hardly changes, and a picture pattern exactly as imagined is accurately applied to the ceramic. Can be reproduced.
Specifically, one or more metal oxide powders selected from vanadium, zirconium, cobalt, chromium, cadmium, aluminum, zinc, praseodymium, tin, manganese, iron, selenium, silica, etc. can be exemplified. Commercially-available pigments for ceramics for the temperature (800 ° C. or higher) can also be used. For typical colors, the metal to be the oxide is shown in parentheses below. Coral pink (zirconium, silica, iron), Turkish blue (vanadium, zirconium, cobalt), praseodymium yellow (zirconium, praseodymium, silica), black (chromium, iron, cobalt), orange (praseodymium, zirconium), red (selenium, cadmium,
zirconium).

As the dispersion medium, it is preferable to use a waxy substance which is solid at room temperature, such as crayon, so that the colored layer 12 can be easily formed.
This is particularly effective when the underlayer 10 is made of oil-based medium. The waxy substance is mainly composed of paraffin, beeswax, wood wax, etc., and hardened oil for adjusting hardness and melting point,
Examples thereof include liquid paraffin, carnauba wax and the like, and an extender pigment such as talc may be added as long as color development is not impaired. Further, a liquid such as water can be used as the dispersion medium.
It is possible to draw a three-dimensional pattern by increasing the thickness of the second layer.

As described above, since the work of forming a picture pattern on the transfer sheet 2 by hand-drawing is very simple compared to the case of painting directly on ceramics, even a beginner such as a lower grade elementary school student can do so. The coloring layer 12 can be easily formed, and a painted ceramic can be manufactured through the following steps.

First, the formed colored layer 12 is covered with a protective layer 14. Examples of the protective layer 14 include a resin sheet made of a polyester resin, a polyolefin resin, a polyurethane resin, a polyvinyl alcohol resin, a vinyl acetate resin, or the like, and can be provided on the upper surface of the coloring layer 12 by laminating. Alternatively, screen printing, spray coating, roller coating, doctor blading, etc. using a liquid protective layer material such as an acrylic resin or a vinyl acetate resin or a protective layer material dissolved or emulsified in a liquid solvent. Thus, the protective layer 14 can be formed.

Next, the transfer sheet 2 on which the colored layer 12 and the protective layer 14 are formed is immersed in water to dissolve the adhesive layer 8,
The laminate 16 including the underlayer 10, the coloring layer 12, and the protective layer 14 is separated from the release layer 6 and placed at a predetermined position on the porcelain 18. Thereafter, by extruding water or air while extending the wrinkles of the laminate 16, as shown in FIG.
It is brought into close contact with the surface of the ceramic 18. Instead of dissolving the adhesive layer 8 in water, the laminate 16 may be peeled off from the release layer 6 and placed on the surface of the ceramic 18.

The porcelain 18 used in the present embodiment is not particularly limited, but is preferably a porcelain obtained by firing a porcelain clay mainly composed of silicon oxide, metal oxide and silicate mineral. Further, it is more preferable that the unglazed product is glazed using a frit or a transparent glaze mainly composed of a frit, and baked again to smooth the surface. Specifically, it is preferable to have a surface smoothness having an average surface roughness Ra of 0 to 0.3 μm, and more preferably 0 to 0.15 μm. The ceramic 18 is preferably a plate-like body having a thickness of about 2 to 30 mm, and its color tone is preferably white or light.

By firing the laminate 16 in close contact with the porcelain 18 in this way, the underlayer 10 and the protective layer 14 are baked.
In addition, the dispersing medium of the colored layer 12 is decomposed and removed, and the color glaze of the colored layer 12 is fixed on the surface of the ceramic 18 to complete the painting ceramic. In order to perform this step, the firing temperature is generally 600 to 800 ° C. or higher. However, in order to obtain good weather resistance and durability, firing at 1000 to 1300 ° C. for 2 to 8 hours is performed. The firing is preferably performed, and the firing temperature is more preferably 1100 to 1200 ° C.
By such high temperature firing, a part of the color glaze is
(Or glaze), and stable painting without discoloration or deterioration can be performed for a long time.
For example, it becomes possible to store semi-permanently as an art porcelain plate, a sign porcelain plate, or a tile for a bathroom or a school building.

[0024]

EXAMPLE An adhesive layer composed of dextrin on a release layer of a base material layer (coated paper) using a 300-mesh screen plate, and a base layer composed of an oily medium in which vegetable starch is dissolved in an ester solvent. Were sequentially laminated to prepare transfer paper. The average surface roughness Ra of this transfer paper was 5.1 μm.

Further, a transparent glaze is applied to a porcelain plate (flat porcelain) and fired, so that the average surface roughness of the glazed surface is Ra.
Obtained a glazed ceramic plate having a thickness of 0.06 μm.

The surface roughness was measured by a surface roughness measuring device "Surfcom 300B" manufactured by Tokyo Seimitsu Co., Ltd. The measurement results are shown in FIGS. 2A and 2B (chart speed 3 mm / sec, tracing speed 0.3 mm / sec).

Next, 100 parts of paraffin and 25 parts of hardened oil were heated and melted, and 200 parts of color glaze (100 parts of pigment + 100 parts of frit) were added and mixed well to obtain a diameter of 1c.
m and poured into a 10 cm long paper cylinder and cooled to produce a coloring tool.

When drawing (forming a colored layer) on the transfer paper using the coloring tool, drawing on the transfer paper could be easily performed in the same manner as drawing on paper using ordinary crayons. . Next, on the transfer paper on which the colored layer is formed, after providing a protective layer made of an acrylic resin by screen printing, immersion in water to separate the laminate of the underlayer, the colored layer and the protective layer from the base layer. This laminate was placed on the glazed surface of the glazed ceramic plate.

Then, the glazed ceramic plate on which the laminate is placed is
It was baked at 200 ° C. for 3 hours to obtain a painted ceramic plate. This painted ceramic plate had a good fixation of the color glaze on the ceramic plate, and was a painted ceramic plate in which the brushstroke and color tone drawn on the transfer paper were reproduced on the ceramic plate almost as it was.

[0030]

As is apparent from the above description, according to the method for manufacturing a painted ceramic according to the present invention, the surface of the underlayer in the transfer sheet having the underlayer releasably provided on the substrate layer. A colored layer formed by a coloring tool formed by dispersing a color glaze powder previously fired and colored in a solid or liquid dispersion medium, and using the base layer and the colored layer laminate as the base material. A first step of separating the layers from each other, a second step of placing the laminate on a pre-smoothed glazed surface of ceramics, and a step of firing the ceramics to form the base layer and the coloring in the laminate. The third step of removing the dispersion medium of the layer and fixing the color glaze of the colored layer on the surface of the ceramic is performed so that the painted ceramic is manufactured, so that compared with the case of directly drawing on the surface of the ceramic. The formation of colored layers by hand-drawing It is possible to perform the easily, it can be reflected to the ceramic with little change brushstrokes and color tone at the time of hand-painted.

Further, in the first step, after the surface of the colored layer is covered with the protective layer, the laminate including the protective layer is separated from the base material layer, so that generation of stains and scratches on the colored layer is prevented. Can be prevented. Further, the laminate can have strength, and when the laminate is separated from the base material layer or placed on the surface of the ceramics, the base layer can be prevented from being broken or damaged.

The colored layer can be formed by setting the average surface roughness Ra on the surface of the underlayer to 0.3 to 60 μm and the average surface roughness Ra on the glazed surface of the ceramic to 0 to 0.3 μm. It becomes easy and you can get the painted ceramics as the image.

Also, by making the porcelain plate flat,
Fixing of the color glaze to the porcelain can be performed more easily, and the coloring layer can be formed more easily by using a wax-like substance as the main component of the dispersion medium.

In the third step, the sintering temperature of the porcelain is 1000 to 1300 ° C., and the sintering time is 2 hours.
Up to 8 hours, the durability of the painted pattern,
The weather resistance can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view for explaining a method of manufacturing a painted ceramic according to an embodiment of the present invention, and shows (a) a state in which a colored layer constituting a desired picture pattern is formed on a transfer sheet. It is sectional drawing, (b) It is sectional drawing which shows the state in which the laminated body was mounted on the porcelain.

FIGS. 2A and 2B are diagrams showing measurement results of surface roughness, (a) a diagram showing an average surface roughness of an underlayer surface, and (b) a diagram showing an average surface roughness of a ceramic glaze surface.

[Explanation of symbols]

 2 Transfer Sheet 4 Base Layer 6 Release Layer 8 Adhesive Layer 10 Underlayer 12 Colored Layer 14 Protective Layer 16 Laminate 18 Ceramics

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Narito Nishijima 926, Shigaraki-cho, Shiga, Koga-gun, Shiga Prefecture Inside the Shigaraki Plant of Ohmi Ceramics Co., Ltd. Otsuka Ohmi Ceramics Co., Ltd.

Claims (6)

[Claims] 1. A color glaze powder, which has been fired and colored in advance, is dispersed in a solid or liquid dispersion medium on the surface of the base layer of a transfer sheet having a base layer releasably provided on a base layer. A method for painting a ceramic using a colored layer formed by a coloring tool comprising: a first step of separating a laminate of the base layer and the colored layer from the base layer; A second step of placing the laminate on a glazed surface of the porcelain ceramic, and baking the porcelain to remove the dispersing medium of the underlayer and the colored layer in the laminate, and perform the coloring. And fixing the color glaze of the layer to the surface of the ceramic. 2. The first step includes, after covering the surface of the colored layer with a protective layer, separating the laminate including the protective layer from the base layer. By firing the ceramic,
2. The protective layer is removed together with a dispersion medium of the underlayer and the coloring layer in the laminate.
3. A method for producing a painted ceramic according to the above. 3. An average surface roughness Ra on a surface of the underlayer is 0.3 to 60 μm, and an average surface roughness Ra on a glazed surface of the ceramic is 0 to 0.3 μm. Item 3. The method for producing a painted ceramic according to Item 1 or 2. 4. The method for manufacturing a painted ceramic according to claim 1, wherein the ceramic is flat. 5. The method for manufacturing a painted ceramic according to claim 1, wherein the dispersion medium mainly comprises a waxy substance. 6. The firing temperature of the porcelain in the third step is 1000 to 1300 ° C., and the firing time is 2 to 2.
The method for producing painted ceramics according to any one of claims 1 to 5, wherein the time is 8 hours.