JP2018008845A - Method of producing pottery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce highly designed pottery with a characteristic pattern on a surface thereof.SOLUTION: A method of producing pottery comprises: a first coating step for applying lustering liquid to an intermediate product after molding and biscuit firing; a second coating step for applying marbling or crackling liquid to the intermediate product having undergone the first coating step; and a first firing step for firing the intermediate product having undergone the second coating step.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a method for manufacturing a pottery.

  Pottery has long been widely used for tableware, teaware, etc., and for ornamental purposes. One of the factors that determine the value of such pottery is the pattern that appears on the surface of the pottery. For example, the more distinctive the pattern on the surface of a pottery, the higher the value of the pottery. For this reason, various attempts have been made regarding the manufacturing process and glaze of pottery in order to improve the beauty of pottery.

JP 2008-81356 A

  Then, the manufacturing method of the ceramics which can manufacture the ceramics with the high design property which has the characteristic pattern on the surface is provided.

  The method for manufacturing a pottery according to the present embodiment includes a first application step of applying a raster liquid to an intermediate product after being molded and unbaked, and a first method of applying a marble liquid or a crackle liquid to the intermediate product that has undergone the first application process. 2 application | coating processes, and the 1st baking process of baking the said intermediate product which passed through the said 2nd application | coating process.

The flowchart which shows each process performed in the manufacturing method of the earthenware by one Embodiment. The figure which shows an example of the raster liquid used in the manufacturing method of the earthenware by one Embodiment. The figure which shows an example of the marble liquid and crackle liquid used in the manufacturing method of the earthenware by one Embodiment Drawing substitute photograph which shows an example of the pottery which has the pattern obtained when using the marble liquid about the manufacturing method of the pottery by one embodiment Drawing substitute photograph which shows an example of the pottery which has the pattern obtained when using the crackle liquid about the manufacturing method of the pottery by one embodiment

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In addition, in this embodiment, "ceramics" are comprised using the soil containing an organic substance as a main raw material. Therefore, of course, the concept of “ceramic” in the present embodiment does not include “porcelain” whose main material is crushed ceramic stone or soil with a small content of organic matter.
In the following description, a product before the manufacturing process in the present embodiment is completed, that is, a product in the process of steps S11 to S20 in FIG. 1, is referred to as an “intermediate product”, and steps S11 to S20 in FIG. The finished product is called “finished product”.

  When the production process of the pottery shown in FIG. 1 is started (start), first, as shown in step S11, a molding process is executed. The molding process is a process of molding the base clay into a product shape. When the target product is composed of a plurality of parts such as a teapot, each part is individually molded. Thereafter, in step S12, a drying process is executed, whereby the intermediate product molded in the molding process of step S11 is dried.

  Next, in step S13, an unglazed process is performed. The unglazed step is a step of baking the intermediate product at a relatively low temperature of about 700 ° C. to 800 ° C., for example. When the target product is composed of a plurality of parts, the parts are combined and combined before the unglazed process. Next, in step S14, a painting process is performed. The painting process is a process in which glaze is applied to the surface of the unbaked intermediate product to perform painting. Thereafter, in step S15, a main baking process is performed. The main baking step is a step of baking the intermediate product at a higher temperature than the unglazed step, for example, about 1100 ° C to 1200 ° C. Incidentally, steps S11 to S15 are general pottery manufacturing processes.

  Next, in step S16, the first application process is executed. A 1st application | coating process is a process of apply | coating a raster liquid with respect to the intermediate | middle goods after shaping | molding and unbaking. As shown in FIG. 2, the raster liquid includes, for example, a colorless raster liquid, a green raster liquid, a light blue raster liquid, and a plurality of other types, and the color obtained in the finished product varies depending on the components contained.

  A raster liquid is a solution containing a metal resinate. Examples of metals constituting the metal resinate contained in the raster liquid include noble metals such as gold, platinum, silver, palladium, rhodium, and ruthenium, bismuth, tin, titanium, copper, zirconium, zinc, indium, neodymium, chromium, and lithium. There are base metals such as magnesium, manganese, iron, cobalt, molybdenum, vanadium, aluminum, calcium, nickel, and barium.

  Next, a drying process is performed in step S17. In the drying step of step S17, the raster liquid applied to the surface of the intermediate product is dried by, for example, natural drying or a drying chamber. A metal film is formed on the surface of the intermediate product by the first coating process in step S16 and the drying process in step S17.

  Next, in step S18, a second application process is performed. The second coating step of step S18 is a step of further applying a marble liquid or crackle liquid to the surface of the intermediate product to which the raster liquid has been applied through the first coating process and the drying process. The marble liquid and crackle liquid are both solutions containing ethanol, as shown in FIG. In this case, both the marble liquid and the crackle liquid are mainly composed of water and ethanol. By this second coating step, the metal film formed on the surface of the intermediate product by the application of the raster liquid reacts with ethanol contained in the marble liquid or crackle liquid, thereby cracking or cracking the metal film on the surface of the intermediate product. Is formed.

  Next, in step S19 of FIG. 1, the first baking process is performed. The first firing step of Step S19 is a step of firing the intermediate product that has been subjected to the marble liquid and the crackle liquid through the second coating process of Step S18. In this case, the first baking process of step S19 is based on oxidation baking. The oxidation firing is firing at a temperature of about 1100 ° C. to 1200 ° C., for example, as in the main firing step. In this case, since a large amount of air, that is, oxygen is supplied into the kiln, almost complete combustion occurs. Therefore, in the first baking process of step S19 in which oxidation baking is performed, the metal film formed on the surface of the intermediate product is oxidized and changed to an oxide film.

  Thereafter, in step S20, a second baking process is performed. The second firing step of Step S20 is a step of further reducing and firing the intermediate product that has undergone the first firing step of Step S19. Reduction firing is firing at a temperature lower than that of oxidation firing, for example, a temperature of about 900 ° C. to 1000 ° C., specifically, a temperature around 950 ° C. In this reduction firing, wood chips and the like are put into the kiln together with the intermediate product, so that the wood chips are burned during combustion to generate carbon monoxide. As a result, the furnace is filled with carbon monoxide and incomplete combustion occurs. Therefore, in the second baking step of step S20 in which reduction baking is performed, the oxide film formed on the surface of the intermediate product is reduced. Then, the pottery manufacturing process is completed (end), and the pottery having a pattern on the surface is completed.

  Here, the base metal is relatively easily subjected to oxidation / reduction reaction as compared with the noble metal. Therefore, when the metal resinate comprised from the base metal is included in the raster liquid used in the first coating process of step S16, the second baking process of step S20 is further performed after the first baking process of step S19. In other words, further reduction firing is performed after the oxidation firing, so that the original color of the metal constituting the metal resinate can be obtained.

  According to this, as shown in FIG. 4 and FIG. 5, the surface of the pottery has a metallic luster and a pattern having many cracks, that is, an extremely characteristic shape having a cracked shape having a metallic luster and cracking. A typical pattern is formed. In this case, in the second coating process in step S18, the pattern to be obtained varies depending on whether the marble liquid or the crackle liquid is used. For example, the pottery shown in FIG. 4 is obtained by applying a marble liquid in the second application process of step S18. Moreover, the earthenware shown in FIG. 5 has applied the crackle liquid in the 2nd application | coating process of step S18. Incidentally, in both cases of FIG. 4 and FIG. 5, a raster solution containing a metal resinate composed of a base metal is used in the first coating process of step S <b> 16.

  That is, in the second coating step, by applying marble liquid to the intermediate product, as shown in FIG. 4, it is possible to obtain a characteristic pattern that has regular cracks extending in one direction. Further, in the second coating step, by applying a crackle liquid to the intermediate product, a characteristic pattern that is irregularly cracked can be obtained as shown in FIG. In addition, when the inventor tried changing the order of the first coating process in step S16 and the second coating process in step S18, that is, after applying the marble liquid or crackle liquid to the intermediate product, the raster liquid was applied. However, a beautiful pattern as shown in FIGS. 4 and 5 could not be obtained.

According to the embodiment described above, the method for manufacturing a pottery includes a first application step of applying a raster liquid to an intermediate product after being molded and unbaked, and a marble liquid or crackle applied to the intermediate product that has undergone the first application step. A second application step of applying a liquid; and a first baking step of baking the intermediate product that has undergone the second application step.
According to the method for manufacturing a pottery according to this embodiment, as shown in FIG. 4 and FIG. 5, it is possible to obtain a pottery with high design having a very characteristic pattern on the surface.

  In the embodiment described above, the raster liquid only needs to contain a metal resinate, and the types and contents of the components are not limited to those shown in FIG. Further, the components of the marble liquid and the crackle liquid only need to contain ethanol, and the types and contents of the components are not limited to those shown in FIG. In addition, the temperature of the unbaking process, the main baking process, the first baking process, and the second baking process is not limited to those described above, depending on the components of the base clay, the size of the product, the capacity and performance of the kiln, etc. Adjustments can be made as appropriate as long as the object can be achieved.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

Claims (3)

A first application step of applying a raster liquid to the intermediate product after molding and unbaking;
A second application step of applying marble liquid or crackle liquid to the intermediate product that has undergone the first application step;
A first firing step of firing the intermediate product that has undergone the second coating step;
Of pottery. The raster liquid contains a metal resinate,
The marble liquid and the crackle liquid contain ethanol,
The method for producing a pottery according to claim 1. The first firing step is by oxidation firing,
A second firing step of reducing and firing the intermediate product that has undergone the first firing step;
The method for producing a pottery according to claim 1 or 2.