JPS6054251B2 - A method for producing a natural stone-like enamel product that has an irregular and sparse pattern of large and small spots and a texture in which the spots are intricately intertwined. - Google Patents

Description

[Detailed description of the invention] This invention has an irregular and sparse pattern of large and small spots,
This invention relates to a method for manufacturing natural stone-like enamel products that have a texture in which spots are intricately intertwined.

Conventional enamel products are made by firing the bottom glaze, then rolling the top glaze and firing it to create the final product.

In addition, for ceramics, etc., a special surface shape is obtained by applying a uniquely colored, easily melted glaze on top of the top-fired item and firing it. Such glazes are generally called nagashi glazes or nagashibori glazes, and are given names such as marble glazes, striped glazes, and bokashi glazes, depending on the patterns obtained. Naturally produced stones, on the other hand, have crystals of quartz, feldspar, plagioclase, mica, etc. in the ground color, forming irregular patterns with a mixture of large and small spots.

Moreover, naturally occurring stones are formed through a complex process, and the crystals and formations vary depending on the land and strata where they are produced.
The quality and form of existence (stone texture) differ slightly. In particular, the large and small spots and patterns scattered within the background color are 2.0
-1! There are many more than rlR. The present inventors first developed a natural stone-like enamel product that has a texture that is studded with patterns of irregular and sparse large and small spots in the ground color found in the natural world. In reality, due to constraints such as ground glaze conditions, more than 4 meshes (5.0!1r1
! It was difficult to obtain a large speckled pattern (1 or more). Also, among natural stones that are generally used as stone materials, granite and marble, which are used as luxury items, are collections of crystals that are intertwined with each other and have a pattern of multiple large and small spots mixed together. is forming. On the other hand, in the field of interior and exterior panels for construction, there have been some enamel products that have a stippled pattern on the surface by applying glaze to the base glaze in a stippled manner.

However, in the case of this conventional technology, there are many small patterns with the maximum size of the staples pull being about 10Ts1t, and if you try to make the pattern larger, it will become a circular staples pattern, and as the thickness of the glaze increases, the glazing will be difficult to hold, and cracks may occur. The disadvantage was that it was more likely to cause enamel defects. This invention is a method developed for the purpose of improving the above-mentioned conventional technology, and is based on the 5.0? It has irregular and sparse large and small spots, including spots of a size larger than or equal to
The present invention also relates to a method for manufacturing a natural stone-like enamel product that has a delicate stone texture with intricately intertwined speckled patterns.
The invention will be explained in detail below. In the method of this invention, the base metal is first underglazed in a conventional manner and then glazed with a conventional top glaze.

And, there is a large, irregularly shaped states pull pattern (reference photo A).
), apply the following under-finish glaze. That is, this prefinishing glaze has a viscosity of 10.0% per 100 parts by weight of frit. Water-containing amorphous below the lime. 5 parts by weight or less of silicon oxide, 5.0 parts by weight or less of bentonite, and 0.05 to 1.0 parts by weight of sodium silicofluoride. It is a mixture of four types of mill additives in the range of glazing parts, and by using this, it is possible to control the so-called adhesion amount and adhesion strength during glazing.

The reason why the mill additive is in this range in such a prefinishing glaze is that the viscosity addition amount is 10.

If the amount of bentonite is more than 0 parts by weight or more than 5.0 parts by weight, the specific gravity and viscosity of the glaze will increase, and it will not only be difficult to obtain a desired film thickness, but also cause enamel defects such as cracks. .

In addition, 5. hydrous amorphous silicon oxide. If it exceeds the weight,
This is because dry film peeling and penetration defects occur. Furthermore, sodium silicofluoride is a strong deflocculant, and its effect is noticeable even when added in small amounts, but the effect is only seen when it is added in amounts of 0.05 parts by weight. Addition of more than the slender weight may cause foam defects, etc. In this invention, the use of other deflocculants requires a large amount of addition to produce a large staple pattern.
This is not preferable because it causes discoloration and bubble defects. On the other hand, as will be described later, since the under-finishing glaze is applied and fired immediately after glazing the staple pattern without firing or firing, it is important to control the thickness of the under-finishing glaze. Become.

The drawing shows the amount of sodium silifluoride added and the height of the states pull (film thickness) when the specific gravity of the glaze is set to 1.5\1.85.
This shows the relationship between the time and stop time. Regarding the relationship of sodium silicofluoride to the retention time, when the specific gravity is small, adding a small amount has a significant effect. Further, when the specific gravity is large, the film thickness increases rapidly until the amount of sodium silicofluoride added reaches a certain value, and enamel defects such as cracks occur when the amount exceeds 400 μm. When the specific gravity is small, increasing the amount of sodium silicofluoride added improves the retention, but the increase in film thickness is small and becomes too thin, making the staple pattern less noticeable. Therefore, the film thickness of the states pull pattern is 30μ or more, 40μ
It is desirable to keep the specific gravity below 0μ, and the specific gravity should be controlled at 1.6 to 1.
．． It is necessary to carry out strictly within the range of 8. Next, after exposing a large, irregularly shaped staple pattern (reference photo A) by applying the lower finishing glaze, the upper finishing glaze is applied immediately after firing or without firing, and the so-called so-called glaze is applied. Spot pattern consisting of irregular and sparse sizes (reference photo B)
form.

The finishing glaze used here is made by adding 0.5 to 2 parts of colored frit to 10 parts of transparent frit.

The colored frit is a colorless frit with Ti. ．． Sb
．． sCO,. Mrl, FelCr. sNi,. It is made by blending a non-volatile and coloring heavy metal such as Cu, heating and melting it, and then pulverizing it to a particle size of 4 to 40 mesh. Naturally, one type or two or more types of heavy metals are used,
It is selected as appropriate depending on the purpose. These colored frits are strongly colored coarse particles that are baked in their original shape without melting or deforming during the firing process, and the irregular, sparse, large and small particles inside the transparent frit are It forms spots. Furthermore, the colored frits mentioned above are not limited to one type, but two or more types can be used.

Also, in order to obtain a more stoney texture, the particle size should be chosen to be within the range of 4 to 40 mesh. In general, naturally occurring natural stones have crystals of quartz, feldspar, plagioclase, mica, etc. present in an irregular spotted pattern in the ground color.

Table 1 shows the percentage of crystals scattered on natural stones according to their size and color.There are few speckled patterns of 40 mesh or less, and there are many large speckled patterns of 10 mesh or more. In addition, among the natural stones used as stone materials, granite and marble, which are used as luxury items, are a collection of crystals, and have a delicate texture with intricately intertwined patterns of large and small spots. There are many large speckled patterns larger than mesh. ÷6 Through such processing, the large one is 5.0 TIr! ! It is possible to produce a high-grade natural stone-like enamel product having an appearance in which a pattern of large and small spots, including spots larger than L or larger, are intricately intertwined. for example,
After firing the lower glaze, a light gray colored upper glaze is applied, and then a white colored lower finishing glaze is immediately applied to create a large irregularly shaped staple pattern, and then a colored frit containing Ti is applied to the transparent frit ( white spots) and M
n. Ni. ．． By applying a top finish glaze containing CO-containing colored frit (resulting in blackish brown spots) and firing, the colored top glaze and bottom finish glaze create a large states pull pattern, and the top finish glaze creates white and black colors. It is possible to obtain a white magenta-like enamel product (reference photo C) in which a pattern of large and small spots appears intricately intertwined. The particle size range of the colored frit was set in this range because fine particles of 40 mesh or less are not much different from the particle size of the base transparent shaft (90% passing through 200 mesh), and the size of small spots is too small. It becomes less noticeable.

In addition, if it is 4 mesh or more, it is too large and will cause unevenness of the glaze, and the condition of the coating formed by the top glaze, states pull glaze (lower finishing glaze) and transparent glaze (top finishing glaze) will deteriorate.
Enamel defects such as cracks are more likely to occur. Furthermore, the mixing ratio of colored frit to transparent frit is set within this range because if it is less than this range, spots will not be noticeable, and if it is more than this range, the formation of a film by the transparent glaze formed after firing will be impaired.

In addition, in this invention method, first the underglaze is applied according to the conventional method, and then the top glaze is applied, but the following two steps are performed as subsequent steps.
Two methods are used.

The first method is to apply the above-mentioned lower finishing glaze and upper finishing glaze immediately without firing after the upper glazing, and then firing the glaze. On the other hand, the other method is
This is a method in which the top glaze is first fired, then the bottom finishing glaze and top finishing glaze are applied, and firing is performed again.

According to the former method, the number of firings is reduced, which reduces the cost, and the top glaze, bottom finishing glaze, and top finishing glaze are all integrated, creating a pattern of large and small spots! It creates shading and a subtle stone texture (results in the cracked mesh pattern seen in the background of reference photo B).

However, because the glaze is applied in two layers, it is necessary to control the thickness of the glaze; if it is too thick, the glaze may run or cracks may occur. On the other hand, the latter! According to this method, there is no need to be very careful in controlling the film thickness, but the subtle stone texture that can be seen when applying a double layer of top glaze and finishing glaze is reduced, creating a natural texture that is different from the enamel products mentioned above. The result is an enamel product with a stone pattern. t
Next, examples of the method of this invention will be described. Examples of the formulation of each glaze used are as follows. Top glaze (
4) Bottom finishing glaze (B) After firing the bottom glaze (820'-!0℃), apply the top IlhiCA), immediately apply the bottom finishing glaze (B) in a large staple pattern, then top finish. Apply glaze (C),
It was baked at 780-800°C for 4 minutes.

The resulting product has a large, irregularly shaped white staples pattern (reference photo A) and a sparse white or blackish brown pattern of irregular large and small spots (reference photo B) on a pale gray background. ,
The resulting enamel product has a beautiful appearance similar to high-grade natural stone, with a complex intertwined pattern (reference photo C).

As explained above, according to the present invention, it has irregular and sparse large and small spots, including large spots of 5.0wt or more, and has a delicate stone texture in which the spot pattern is intricately intertwined. You can obtain natural stone-like enamel products.

[Brief explanation of drawings]

The drawing shows the relationship between the amount of sodium silicofluoride added, the enamel film thickness, and the retention time when the specific gravity of the glaze is 1.55 and 1.85.

Claims (1)

[Scope of Claims] 1. A top glaze is applied to the enamel product after firing the bottom glaze, which has been treated according to a conventional method, and is coated with a viscosity of 10.0 parts by weight or less and no water content per 100 parts by weight of frit. 5.0 parts by weight or less of crystalline silicon oxide, 5.0 parts by weight or less of bentonite, and 0.05 to 1.0 parts by weight of sodium silicofluoride are blended and pulverized to a specific gravity of 1.6 to 1.8. A prefinishing glaze adjusted to a certain range is applied, and then a finishing glaze whose main ingredient is 0.5 to 20 parts by weight of colored frit with a particle size of 4 to 40 mesh added to 100 parts by weight of transparent frit is applied and fired. A method for producing a natural stone-like enamel product having an irregular and sparse pattern of large and small spots and a texture in which the spots are intricately intertwined. 2. A top glaze is applied to the enamel product after firing the bottom glaze, which has been treated according to a conventional method, and then fired, and on top of that, hydrated amorphous silicon oxide with a viscosity of 10.0 parts by weight or less per 100 parts by weight of the frit is applied. 5.0 parts by weight or less, 5.0 parts by weight of bentonite.
0 parts by weight or less and 0.05 to 1.0 parts by weight of sodium silicofluoride.
A pre-finishing glaze with a specific gravity adjusted to a range of 1.6 to 1.8 by blending and crushing 0 parts by weight is applied, and then a transparent frit 1 is applied.
Irregular, sparse, large and small spotted pattern characterized by applying and firing a finishing glaze whose main ingredient is 0.5 to 20 parts by weight of colored frit with a particle size of 4 to 40 mesh per 00 parts by weight. A method for manufacturing natural stone-like enamel products with a texture in which spots are intricately intertwined.