JPH03271177A - Decorated pottery and preparation thereof - Google Patents

Abstract

PURPOSE:To prepare a semi-lustrous decorative pottery having excellent stereo scopic appearance, etc., by coating the whole surface of the dry raw substrate of the pottery with a lustrous colored base glaze and further coating the precoated surface with a matting agent having the same color tone and subse quently with plural kinds of patterning matting or lustering glazed in a spotting pattern state. CONSTITUTION:The whole surface of the dry raw substrate A' of a pottery is successively coated with a lustering, colored base glaze 1 (e.g. a slurry containing feldspar, dolomite, zinc flour, ziron-containing stain, etc.), with a matting glaze 2 having the same color tone and having an increased melt viscos ity by a spray means, with a matting glaze 3 or lustering glaze for forming a pattern in a spotting pattern stage by a spray means and further with a patterning matting glaze 4 having an increased melt viscosity in a spotting pattern state by a spray means. The glazed pottery dry raw substrate A' is sintered to provide a decorative pottery having a natural stone pattern and suitable for a sanitary ware, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to decorative ceramics such as sanitary ware and tiles having a semi-glossy natural stone pattern, and a method for producing the same.

(Conventional technology) Conventionally, the technology to create a natural stone-like pattern on the surface of ceramics has been to create a stone pattern on the surface by combining the pattern of glaze applied to the surface of the dry base of ceramics and the color of the glaze. There is a way to create tonal patterns.

Natural stone can also be made by applying a transparent glaze to the entire surface of a dry base, applying two or more types of matte glaze in spots using a spot glazing machine, and firing (see Japanese Patent Application Laid-Open No. 55-60078). You can create a spotted pattern like this.

(Problems to be Solved by the Invention) However, the above-mentioned method of combining the glaze application pattern and the glaze color did not produce a pattern similar to natural stone, and the texture of the product lacked weight and depth such as three-dimensionality. There wasn't. On the other hand, although the latter method can produce a pattern that is somewhat similar to natural stone, it is difficult to achieve a three-dimensional feel, weight, and depth as a texture, and it is also difficult to control the degree of gloss, resulting in a semi-gloss natural stone pattern. I can't do that. Furthermore, natural stone patterns cannot be applied to products with complex shapes such as sanitary ware.

Therefore, decorative ceramics whose surfaces are decorated by glazing and which have a natural stone pattern that is semi-glossy and has depth and weight such as a three-dimensional effect as a texture have not been provided so far.

The present invention has been made in view of the current situation, and provides decorative ceramics having a natural stone pattern that is semi-gloss and has depth and weight such as a three-dimensional feel as a texture. The purpose of this project is to propose a technique for decorating ceramics that can be applied to ceramics and even control the degree of gloss.

(Means for Achieving the Object) In order to achieve the above object, in the decorative ceramics of the present invention, a layer of glossy colored basic glaze is provided on the surface of the ceramic body, covering the entire surface, and this glossy colored A few layers of matte glaze of the same tone are spread over the base glaze layer.

In addition to providing irregularly shaped spots, two or more types of pattern-making matte glazes or glossy glazes are provided in irregularly shaped spots, and these matte glazes or glossy glazes are mixed in a disorderly manner. A process of applying a glossy basic glaze to the entire surface of a dried ceramic base formed into the shape of the desired product, and spraying a matte glaze with the same color tone as the glossy colored basic glaze and increased melt viscosity onto the glossy colored basic glaze. A step of spraying in spots by lowering the discharge amount of the gun and lowering the air flow rate, and a step of applying two or more patterned matte glazes or glossy glazes in spots using the same spraying method as above, and a step of applying the glaze in spots. It is manufactured by sequentially performing the steps of firing a dry base material.

(Function) The decorative ceramics constructed as above has a semi-gloss appearance as the overall luster is controlled by the matte glaze of the same tone as the glossy colored basic glaze, which is provided in spots on the glossy colored basic glaze. A matte glaze of the same color tone as the glossy colored basic glaze, and two or more kinds of irregularly shaped matte glazes or glossy glazes for creating patterns, which are also glazed in irregularly shaped spots.

The chaotic mixture reveals a natural stone pattern with weight and depth.

In addition, in manufacturing, a matte glaze of the same color tone as the colored base glaze is applied on top of the base glaze, so a semi-gloss state can be easily obtained. By adjusting the viscosity and the amount of glaze applied, different degrees of gloss can be obtained.

Furthermore, since a patterning glaze is sprayed on, the size distribution of spots can be easily controlled and patterns can be applied to products with complex shapes such as sanitary ware.

(Example) Hereinafter, the present invention will be explained in more detail based on examples.

In this example, the decorative ceramic is a seated toilet bowl.

First, a green base for a sitting toilet bowl is formed by casting, and this is dried to obtain a dry base (Ao).

Next, a glossy colored basic glaze (1) exhibiting a grayish-black color is spray applied to the entire surface of this dry base (Ao) to a glaze thickness of 0.5 to 0.55 mm.

The glossy colored basic glaze (1) has a feldspar content of 20 to 40%. Dolomite 3-12. Zinc white 2-10. Limestone 5-20. Alumina 1-6. Silica sand 30-50, each weight% sum of 100
Add 10 to 20% by weight of stain containing an appropriate amount of zircon as a coloring agent to develop a gray-black color, mix 50 to 60% by weight of water, and mix in a bot mill for 15 to 20 minutes.
A slurry made by grinding and blending for 16 hours is used.

Next, on top of the glossy colored basic glaze (1) applied above, a matte glaze (2) with the same color tone and increased melt viscosity (0.1) was applied.
2g/c
It is applied in irregular, irregularly shaped spots.

The matte glaze (2), which has the same color tone as the glossy colored basic glaze and has increased melt viscosity, has a feldspar content of 10 to 30%. Dolomite 20-30.
Zinc white 2-101 limestone 1-5. Alumina l~10. To 100% by weight of the total of 30 to 50% by weight of silica sand, 5 to 15% by weight of stain containing an appropriate amount of zircon to develop a gray-black color as a coloring agent is added, and 50% by weight of water is added.
~60% by weight is mixed in and ground and blended in a bot mill for 15 to 16 hours to form a slurry.

Next, to create a pattern, I first applied a gray matte glaze (3) with increased melt viscosity [1.04g lry! ~0.12
Apply in spots with a spray gun in an amount of about 1.5 g/at.

The discharge air pressure of the above spray gun is 0.1~0.2k
g/at(is.

Also, the gray matte glaze (3) has 20 to 40% of feldspar. Dolomite 1-10. Zinc white 2-109 Limestone 10-20. Alumina El 15. 10 of the total of silica sand 20-40% by weight each
To 0% by weight, 5 to 15% by weight of stain containing an appropriate amount of zircon is added in order to develop a grayish white color, and water is added to 50% by weight.
It is mixed with ~60% by weight and ground and blended in a bot mill for 15 to 16 hours, and used in the form of a thriller.

Next, similar to the above gray matte glaze (3), brown matte glaze (4) with increased melt viscosity was added at 0.03 g/cof to 0.1
Apply in spots with a discharge air pressure of 0.1 to 0.2 kg/cnf from a spray gun of approximately 2 g/ad diameter.

This brown matte glaze (4) has 20 to 40% feldspar. Dorophyto 3-12. Zinc white 2-10. Limestone 5-20. Alumina 1-6. 100 of the sum of silica sand 30-50% by weight each
It is a slurry-like glaze that is milled and mixed in a bot mill for 15-16 hours with 10-20% by weight of stain added as a coloring agent to develop a brown color and 50-60% of water mixed in. .

Finally, dry ceramic base (A) glazed as above.
o) is fired in a tunnel kiln, roller hearth kiln, etc. at a maximum firing temperature of 11H°C to 1200°C for 20 to 28 hours to obtain finished ceramics.

The seated toilet obtained in this example has a ceramic main body (A)
The surface has a semi-gloss luster, and a complex pattern of gray and brown scales is formed within the gray-black matte glaze, which has the same tone as the base glaze. Furthermore, since the melt viscosity of the patterning glaze is increased, the pattern does not run on the upright surface of the seated toilet, and the same pattern as on the flat surface is formed.

In the above-mentioned embodiment, two types of pattern glazes were used, but two or more types of glazes may be used as necessary. The glaze used may be a matte glaze, a glossy glaze, or a combination of a matte and glossy glaze. Furthermore, the size of the spots can be adjusted to any desired size by adjusting the amount and time of ejection from the spray gun.

The amount of alumina added to increase melt viscosity is 44 to 108
0% by weight is desirable.

The present invention also relates to press-formed products other than cast molding.

Even when applied to extrusion molded products, the same effects as cast molded products can be obtained.

(Effects of the invention) ■A matte glaze with the same color tone as the glossy colored basic glaze and increased melt viscosity is applied on the glossy colored basic glaze applied to the dry surface of the ceramic base, and then two or more types of patterned glazes are applied. Since a deglaze or glossy glaze is applied, it has a semi-gloss finish that gives it a three-dimensional feel and weight.
A ceramic product having a deep natural stone pattern can be obtained.

2. The degree of gloss can be easily controlled by adjusting the melt viscosity of the matte glaze of the same color applied on the glossy colored basic glaze.

3. Since the patterning glaze is applied in spots using a spray method, the size and distribution of the spots can be easily controlled, and natural stone patterns can be applied to products with complex shapes such as sanitary ware.

[Brief explanation of drawings]

The drawings are cross-sectional views showing the manufacturing method of decorative ceramics according to an embodiment of the present invention in the order of steps. Fig. 1 shows the process of applying a glossy colored basic glaze, and Fig. 2 shows the application of a matte glaze of the same tone as the glossy colored basic glaze. Fig. 3 shows the process of applying a patterned matte glaze, and Fig. 4 shows the product after firing. A: Ceramic body Ao: Dry ceramic base 1: Glossy colored basic glaze 2: Matte glaze with the same tone as the glossy colored basic glaze 3: Matte glaze for patterning: Matte glaze for patterning Figure 1 Figure 2 Figure 3 Figure 4 Figure 1, Display of the case Heisei 2 Procedural amendment May 29, 1990 2477 Claims (1) A glossy colored base glaze provided on the surface of the ceramic body, covering the entire surface thereof. a matte glaze of the same color tone as the glossy colored base glaze provided in the form of irregular and irregularly shaped spots on the glossy basic glaze layer; Decorative ceramics having two or more kinds of pattern-producing matte glazes or glossy glazes mixed randomly with the above-mentioned matte glaze. The claims in the Heisei Specification are amended as shown in the attached sheet. (2) a) a step of applying a glossy colored basic glaze to the entire surface of a dried ceramic base; b) a means of spraying a matte glaze with the same color tone as the glossy colored basic glaze and increased melt viscosity onto the glossy colored basic glaze. c) applying two or more patterned matte glazes or glossy glazes in spots using a spray means; d) firing the glaze. How to make decorative ceramics.

Claims (2)

[Claims] (1) A layer of glossy colored basic glaze provided on the surface of the ceramic body so as to cover the entire surface, and the above glossy colored basic glaze provided in irregular, irregularly shaped spots on the glossy basic glaze layer. A matte glaze of the same color tone, and two or more kinds of pattern-producing matte glazes or glossy glazes, which are provided in irregular, irregularly shaped spots on the glossy colored base glaze and mixed with the matte glaze in a disorderly manner. Decorative ceramics. (2) a) A step of applying a glossy colored basic glaze to the entire surface of the dried ceramic base; b) A matte glaze or glossy glaze with the same color tone as the glossy colored basic glaze and increased melt viscosity on the glossy colored basic glaze. c) applying two or more patterned matte glazes or glossy glazes in spots using a spraying means; d) firing the glaze. A manufacturing method for decorative ceramics.