Process for manufacturing a building cup

Abstract

The application discloses a building bowl preparation process, which comprises the following steps: preparing a blank body raw material and a glaze slurry, drawing the blank body raw material into a shape, repairing the blank body, primary firing, cooling, and obtaining a blank body; applying the glaze; placing the blank body after the glaze is dried into an electric kiln for baking, and taking out the blank body from the kiln. The building bowl blank glaze formula, temperature curve, kiln atmosphere and other process flows are clear, easy to control, good in stability, and high in finished product rate. The building bowl after being fired has a size-variable sunspot in the bottom glaze of the building bowl, the sunspot is bright and crystal clear, the outer edge of the sunspot has a halo, and the glaze layer further has colorful filaments, which are as bright as stars in the night sky, as bright as meteor showers in the night sky, and have extremely high artistic value and appreciation value.

Description

Technical Field

[0001] This invention relates to the field of porcelain technology, and more specifically to the preparation process of Jianzhan (Jian ware). Background Technology

[0002] Jian ware is one of the eight famous porcelains of my country. Jian kiln is a renowned kiln in my country, and its kiln-transformed Jian ware is a rare and exquisite product. Among the Jian ware family, oil-spot, hare's fur, and partridge-feather patterns are considered treasures, making them highly desirable. Yao Bian Jian ware, however, is the pinnacle of Jian ware, considered a treasure among treasures.

[0003] The characteristic of Yao Bian Jian ware is that the glaze base is a dark color such as bluish-black, with colored fine lines and round and oval spots of varying diameters scattered on the glaze surface, with halos around the outer edges of the spots. The overall glaze surface refracts colorful light as the intensity of light changes, which has a strong artistic appeal. However, its firing method was lost in the Song Dynasty. Many ceramic artists, both Chinese and foreign, have devoted their lives to studying it, but without success.

[0004] Why has the art of Yao Bian Jian ware been lost for hundreds of years and difficult to recreate? The reason is that there is very little reference material available from the past, and the firing process itself is extremely complex with too many uncertain factors, such as subtle changes in the raw materials of the body and glaze, instantaneous changes in kiln temperature and atmosphere, all of which can bring unexpected results, making the firing process particularly difficult.

[0005] The applicant has encountered countless failures over the past thirty years in his pursuit of Yao Bian Jianzhan, but also received unexpected surprises from these failures, and finally succeeded in developing the Yao Bian Jianzhan preparation process. Summary of the Invention

[0006] The purpose of this invention is to provide a process for preparing Jianzhan (Jian ware), which has a clear process flow and can produce Yao Bian Jianzhan.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The preparation process of Jianzhan (a type of ware) includes the following steps:

[0009] (1) Preparation of raw materials for the green body and glaze slurry;

[0010] The raw material for the blank body is prepared by the following method: 5-6 parts by weight of yellow clay, 2-3 parts by weight of clay and 5-6 parts by weight of red clay are mixed, crushed and washed, passed through a 60-80 mesh sieve, filtered, kneaded and aged, and kneaded again.

[0011] The glaze slurry is prepared by the following method: washing, stirring, and passing the wood ash through a 160-180 mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as wood ash slurry; washing the glaze stone, passing it through a 160-180 mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as glaze stone slurry; stirring the wood ash slurry and glaze stone slurry separately, and then mixing the wood ash slurry and glaze stone slurry at a volume ratio of 1:2.5-3.5, stirring evenly, and aging for later use;

[0012] The yellow clay, clay and red soil were all taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province, and the glaze stone was taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

[0013] (2) The raw material is pulled into shape, trimmed, bisque fired and cooled to obtain the blank;

[0014] (3) Glazing: The inner and outer dipping methods are used. No glaze is applied to the bottom of the body. The glaze layer thickness is 0.4-0.6 mm. After glazing, the body is dried.

[0015] (4) The glazed and dried body is placed in an electric kiln for firing, which involves the following stages:

[0016] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 60-70g of instantaneous ignition pellets are added per cubic meter of kiln space, followed by 110-120g of diesel fuel per cubic meter of kiln space after a 5-minute interval, followed by another 60-70g of instantaneous ignition pellets per cubic meter of kiln space after a 5-minute interval.

[0017] The ignition particles are a mixture of equal weights of chestnut shells and pine resin particles;

[0018] Second stage: Keep warm at 1350℃ for 70 minutes;

[0019] Third stage: After the heat preservation is completed, the kiln is shut down. When the kiln temperature drops to 1250℃, add 140-150g of oil and diesel per cubic meter of kiln space, once every 4 minutes, for a total of 3 times; during this stage, round and oval spots will precipitate.

[0020] Fourth stage: 10 minutes after the last oil and firewood are added, the kiln door is opened with a 4-6cm gap and left open for 30 minutes. During this stage, the kiln temperature drops rapidly. The difference in shrinkage between the iridescent spots and the base glaze during cooling creates a halo around the iridescent spots. Then the kiln door is closed, and the kiln is allowed to cool naturally before being removed from the kiln.

[0021] Furthermore, the instantaneous flammable particles are prepared by the following method: dried chestnut shells are crushed into 10-20 mesh chestnut shell powder, rosin is heated and dissolved, chestnut shell powder of equal weight to rosin is added, stirred evenly, and allowed to cool and solidify naturally; then it is broken into particles by tapping.

[0022] During the first heating stage, the glaze gradually melts. When it reaches 1180℃, the glaze is basically in a molten state. At this time, the instantaneous ignition particles and oil-fired fuel are added in stages. The instantaneous ignition particles burn intensely and the oil-fired fuel burns between the two instantaneous ignition particles, which makes the glaze surface smooth and produces colored fine lines, while reducing the occurrence rate of glaze porosity.

[0023] Furthermore, the wood ash is prepared by the following method: dry camellia seed shells and chestnut wood blocks are mixed and burned in a weight ratio of 1:10-12 to obtain ash.

[0024] The wood ash described in this invention is specially made with the addition of camellia seed shells, which can greatly increase the combustibility of chestnut wood blocks and shorten the burning time. The resulting wood ash can greatly improve the gloss and smoothness of the glaze and make the glaze easier to display colors.

[0025] Preferably, step (2) involves the kiln temperature being raised from room temperature to 600°C at a constant rate over 4 hours, followed by kiln shutdown and cooling.

[0026] By adopting the above technical solution, the present invention has the following advantages:

[0027] The present invention provides a clear and easy-to-control process for the Jianzhan (Jian ware) body glaze formula, temperature curve, and kiln atmosphere, resulting in good stability and a high yield. The fired Yao Bian Jianzhan exhibits shimmering spots of varying sizes within its bluish-black base glaze. These spots are lustrous and translucent, with halos around their edges. The glaze also displays iridescent micro-filaments, resembling the brilliance of stars in the night sky or a meteor shower streaking across the night, possessing extremely high artistic and aesthetic value. Attached Figure Description

[0028] Figure 1 This is a photographic example of the Jianzhan (a type of Chinese ware) prepared according to Embodiment 1 of the present invention;

[0029] Figure 2 This is a photographic example (from another angle) of the Jianzhan (a type of Chinese ware) produced in Embodiment 1 of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] In this invention, unless otherwise specified, all parts and percentages are by weight, and all equipment and raw materials are commercially available or commonly used in the industry. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art.

[0032] Example 1

[0033] The preparation process of Jianzhan (a type of ware) includes the following steps:

[0034] (1) Preparation of raw materials for the green body and glaze slurry;

[0035] The raw material for the blank body is prepared by the following method: 5 parts by weight of yellow clay, 3 parts by weight of clay and 5 parts by weight of red clay are mixed, crushed and washed, passed through an 80-mesh sieve, filtered, kneaded and aged, and kneaded again.

[0036] The glaze slurry is prepared by the following method: washing, stirring, passing through a 180-mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as wood ash slurry; washing, passing through a 180-mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as glaze stone slurry; stirring the wood ash slurry and glaze stone slurry separately, then mixing the wood ash slurry and glaze stone slurry in a volume ratio of 1:3, stirring evenly, and aging for later use;

[0037] The wood ash is prepared by the following method: dry camellia seed shells and chestnut wood blocks are mixed at a weight ratio of 1:10 and burned to obtain ash.

[0038] (2) The raw material is pulled into shape, trimmed, bisque fired and cooled to obtain the blank;

[0039] The bisque firing process involves raising the kiln temperature from room temperature to 600°C at a constant rate over 4 hours, then stopping the kiln and allowing it to cool.

[0040] (3) Glazing: The inner and outer dipping methods are used. No glaze is applied to the bottom of the body. The glaze layer thickness is 0.4-0.6 mm. After glazing, the body is dried.

[0041] (4) The glazed and dried body is placed in an electric kiln for firing, which involves the following stages:

[0042] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 60g of instantaneous ignition pellets are added per cubic meter of kiln space, followed by 120g of oil-fired diesel fuel per cubic meter of kiln space after a 5-minute interval, followed by another 60g of instantaneous ignition pellets per cubic meter of kiln space after a 5-minute interval.

[0043] The instantaneous ignition particles are prepared by the following method: dried chestnut shells are pulverized into 15-mesh chestnut shell powder; rosin is heated and dissolved, and an equal weight of chestnut shell powder is added; the mixture is stirred evenly and allowed to cool and solidify naturally; then it is broken into particles by tapping. The particle size of the instantaneous ignition particles is 10-15 mm.

[0044] Second stage: Keep warm at 1350℃ for 70 minutes;

[0045] Third stage: After the heat preservation is completed, the furnace is shut down. When the kiln temperature drops to 1250℃, add 150g of oil and diesel per cubic meter of kiln space, once every 4 minutes, for a total of 3 times.

[0046] Fourth stage: 10 minutes after the last oil and firewood are added, open the furnace door with a 4-6cm gap and keep it open for 30 minutes. Then close the furnace door and allow it to cool naturally before removing it from the kiln.

[0047] refer to Figure 1 The Yao Bian Jianzhan obtained in this embodiment has flares of varying sizes distributed in the bluish-black base glaze. The flares are smooth and crystalline, with halos around their outer edges. The glaze also has colorful fine lines, like the stars in the night sky or a meteor shower streaking across the night sky. It has extremely high artistic and aesthetic value.

[0048] Example 2

[0049] The preparation process of Jianzhan (a type of ware) includes the following steps:

[0050] (1) Preparation of raw materials for the green body and glaze slurry;

[0051] The raw material for the blank body is prepared by the following method: 6 parts by weight of yellow clay, 3 parts by weight of clay and 5 parts by weight of red clay are mixed, crushed and washed, passed through an 80-mesh sieve, filtered, kneaded and aged, and kneaded again.

[0052] The glaze slurry is prepared by the following method: washing, stirring, passing through a 180-mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as wood ash slurry; washing, passing through a 180-mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as glaze stone slurry; stirring the wood ash slurry and glaze stone slurry separately, then mixing the wood ash slurry and glaze stone slurry at a volume ratio of 1:2.5, stirring evenly, and aging for later use;

[0053] The wood ash is prepared by the following method: dry camellia seed shells and chestnut wood blocks are mixed and burned in a weight ratio of 1:11 to obtain ash.

[0054] (2) The raw material is pulled into shape, trimmed, bisque fired and cooled to obtain the blank;

[0055] The bisque firing process involves raising the kiln temperature from room temperature to 600°C at a constant rate over 4 hours, then stopping the kiln and allowing it to cool.

[0056] (3) Glazing: The inner and outer dipping methods are used. No glaze is applied to the bottom of the body. The glaze layer thickness is 0.4-0.6 mm. After glazing, the body is dried.

[0057] (4) The glazed and dried body is placed in an electric kiln for firing, which involves the following stages:

[0058] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 65g of instantaneous ignition pellets are added per cubic meter of kiln space, followed by 110g of oil-fired diesel fuel per cubic meter of kiln space after a 5-minute interval, followed by 65g of instantaneous ignition pellets per cubic meter of kiln space after another 5-minute interval.

[0059] The instantaneous ignition particles are prepared by the following method: dried chestnut shells are pulverized into 10-mesh chestnut shell powder; rosin is heated and dissolved, and an equal weight of chestnut shell powder is added; the mixture is stirred evenly and allowed to cool and solidify naturally; then it is broken into particles by tapping. The particle size of the instantaneous ignition particles is 10-15 mm.

[0060] Second stage: Keep warm at 1350℃ for 70 minutes;

[0061] Third stage: After the heat preservation is completed, the furnace is shut down. When the kiln temperature drops to 1250℃, add 140g of oil and diesel per cubic meter of kiln space, once every 4 minutes, for a total of 3 times.

[0062] Fourth stage: 10 minutes after the last oil and firewood are added, open the furnace door with a 4-6cm gap and keep it open for 30 minutes. Then close the furnace door and allow it to cool naturally before removing it from the kiln.

[0063] Example 3

[0064] The preparation process of Jianzhan (a type of ware) includes the following steps:

[0065] (1) Preparation of raw materials for the green body and glaze slurry;

[0066] The raw material for the blank body is prepared by the following method: 5 parts by weight of yellow clay, 2 parts by weight of clay and 6 parts by weight of red clay are mixed, crushed and washed, passed through a 60-mesh sieve, filtered, kneaded and aged, and kneaded again.

[0067] The glaze slurry is prepared by the following method: washing, stirring, passing through a 160-mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as wood ash slurry; washing, passing through a 160-mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as glaze stone slurry; stirring the wood ash slurry and glaze stone slurry separately, then mixing the wood ash slurry and glaze stone slurry at a volume ratio of 1:3.5, stirring evenly, and aging for later use;

[0068] The wood ash is prepared by the following method: dry camellia seed shells and chestnut wood blocks are mixed and burned in a weight ratio of 1:12 to obtain ash.

[0069] (2) The raw material is pulled into shape, trimmed, bisque fired and cooled to obtain the blank;

[0070] The bisque firing process involves raising the kiln temperature from room temperature to 600°C at a constant rate over 4 hours, then stopping the kiln and allowing it to cool.

[0071] (3) Glazing: The inner and outer dipping methods are used. No glaze is applied to the bottom of the body. The glaze layer thickness is 0.4-0.6 mm. After glazing, the body is dried.

[0072] (4) The glazed and dried body is placed in an electric kiln for firing, which involves the following stages:

[0073] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 70g of instantaneous ignition pellets are added per cubic meter of kiln space, followed by 115g of diesel fuel per cubic meter of kiln space after a 5-minute interval, followed by 70g of instantaneous ignition pellets per cubic meter of kiln space after another 5-minute interval.

[0074] The instantaneous ignition particles are prepared by the following method: dried chestnut shells are pulverized into 20-mesh chestnut shell powder; rosin is heated and dissolved, and an equal weight of chestnut shell powder is added; the mixture is stirred evenly and allowed to cool and solidify naturally; then it is broken into particles by tapping. The particle size of the instantaneous ignition particles is 10-15 mm.

[0075] Second stage: Keep warm at 1350℃ for 70 minutes;

[0076] Third stage: After the heat preservation is completed, the furnace is shut down. When the kiln temperature drops to 1250℃, add 150g of oil and diesel per cubic meter of kiln space, once every 4 minutes, for a total of 3 times.

[0077] Fourth stage: 10 minutes after the last oil and firewood are added, open the furnace door with a 4-6cm gap and keep it open for 30 minutes. Then close the furnace door and allow it to cool naturally before removing it from the kiln.

[0078] In the above embodiments 1-3, the yellow mud, clay and red soil were all taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province, and the glaze stone was taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

[0079] The glaze stone produced in Nanlin Village mainly contains the following components by weight percentage: SiO2 63-65%, Al2O3 17-19%, Fe2O3 6-8%.

[0080] The pine wood used in this invention, also known as pine root or pine tree root, is rich in resin and can burn intensely at high temperatures. The pine wood and flammable pellets are added through the kiln opening at the kiln door. Unless otherwise specified, the kiln opening is only opened when adding pine wood and flammable pellets; it is closed at other times.

[0081] The Yao Bian Jian ware is extremely sensitive to the firing process and parameters. Even small variations in these steps or parameters can significantly impact the final product's appearance and other characteristics, potentially leading to failure. The inventors conducted extensive experimentation and optimization during the preparation of Yao Bian Jian ware, including selecting the components of the body and glaze raw materials, optimizing the temperature and firing curves, and choosing and timing the type and amount of firewood used. Only then were they able to produce beautiful Yao Bian Jian ware. The following are just a few examples to illustrate this.

[0082] Comparative Example 1

[0083] The difference between this comparative example and Example 1 is that:

[0084] Replace the first stage of step (4) with:

[0085] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours.

[0086] The Jian ware obtained in this comparative example has a dull glaze, no colored hair-like patterns, and a large number of pinholes, resulting in a lack of overall aesthetic appeal and failing to meet the characteristics of Yao Bian Jian ware.

[0087] Comparative Example 2

[0088] Replace the first stage of step (4) with:

[0089] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 60g of oil and diesel is added per cubic meter of kiln space, followed by 120g of oil and diesel per cubic meter of kiln space after a 5-minute interval, followed by another 60g of oil and diesel per cubic meter of kiln space after a 5-minute interval.

[0090] The Jian ware obtained in this comparative example has a dull glaze, a sparse number of colored fine lines, and lacks overall aesthetic appeal, failing to meet the characteristics of Yao Bian Jian ware.

[0091] Comparative Example 3

[0092] Replace the first stage of step (4) with:

[0093] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 60g of instantaneous ignition granules are added per cubic meter of kiln space, followed by 120g of instantaneous ignition granules per cubic meter of kiln space after a 5-minute interval, followed by another 60g of instantaneous ignition granules per cubic meter of kiln space after a 5-minute interval.

[0094] The instantaneous ignition particles are prepared by the following method: dried chestnut shells are pulverized into 15-mesh chestnut shell powder; rosin is heated and dissolved, and an equal weight of chestnut shell powder is added; the mixture is stirred evenly and allowed to cool and solidify naturally; then it is broken into particles by tapping. The particle size of the instantaneous ignition particles is 10-15 mm.

[0095] The Jianzhan obtained in this comparative example has many blistering defects on the glaze surface, and some of the colored hairs are stuck together and blurred, resulting in a lack of overall aesthetic appeal.

[0096] Comparative Example 4

[0097] The difference between this comparative example and Example 1 is that step (4) is replaced with:

[0098] (4) The glazed and dried body is placed in an electric kiln for firing, which involves the following stages:

[0099] First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 60g of instantaneous ignition pellets are added per cubic meter of kiln space, followed by 120g of oil-fired diesel fuel per cubic meter of kiln space after a 5-minute interval, followed by another 60g of instantaneous ignition pellets per cubic meter of kiln space after a 5-minute interval.

[0100] The instantaneous ignition particles are prepared by the following method: dried chestnut shells are pulverized into 15-mesh chestnut shell powder; rosin is heated and dissolved, and an equal weight of chestnut shell powder is added; the mixture is stirred evenly and allowed to cool and solidify naturally; then it is broken into particles by tapping. The particle size of the instantaneous ignition particles is 10-15 mm.

[0101] Second stage: Hold at 1350℃ for 70 minutes; when the holding time reaches 50 minutes, add 150g of oil and diesel per cubic meter of kiln space, once every 4 minutes, for a total of 3 times;

[0102] Third stage: 10 minutes after the last oil and firewood are added, open the furnace door with a 4-6cm gap and keep it open for 30 minutes. Then close the furnace door and let it cool naturally before removing it from the kiln.

[0103] The Jianzhan obtained in this comparative example has fewer glaze spots, and the glaze spots are not as lustrous as in Example 1, resulting in a lack of overall aesthetic appeal.

[0104] Comparative Example 5

[0105] The difference between this comparative example and Example 1 is that:

[0106] Replace the fourth stage of step (4) with:

[0107] Fourth stage: After adding oil and diesel, allow it to cool naturally before removing it from the kiln.

[0108] The Jian ware obtained in this comparative example has virtually no halo around the outer edge of the glaze spots, which does not conform to the characteristics of Yao Bian Jian ware.

[0109] Comparative Example 6

[0110] The difference between this comparative example and Example 1 is that:

[0111] The wood ash is prepared by burning dried chestnut wood blocks to obtain ash.

[0112] The Jianzhan obtained in this comparative example lacks overall glaze luster and color saturation.

[0113] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. The manufacturing process of Jianzhan teacups, characterized by: Includes the following steps: (1) Preparation of raw materials for the green body and glaze slurry; The raw material for the blank body is prepared by the following method: 5-6 parts by weight of yellow clay, 2-3 parts by weight of clay and 5-6 parts by weight of red clay are mixed, crushed and washed, passed through a 60-80 mesh sieve, filtered, kneaded and aged, and kneaded again. The glaze slurry is prepared by the following method: washing, stirring, and passing the wood ash through a 160-180 mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as wood ash slurry; washing the glaze stone, passing it through a 160-180 mesh sieve, allowing it to stand and separate into layers, discarding the water, and obtaining a precipitate as glaze stone slurry; stirring the wood ash slurry and glaze stone slurry separately, and then mixing the wood ash slurry and glaze stone slurry at a volume ratio of 1:2.5-3.5, stirring evenly, and aging for later use; The yellow clay, clay and red soil were all taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province, and the glaze stone was taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province. (2) The raw material is pulled into shape, trimmed, bisque fired and cooled to obtain the blank; (3) Glazing: The inner and outer dipping methods are used. No glaze is applied to the bottom of the body. The glaze layer thickness is 0.4-0.6 mm. After glazing, the body is dried. (4) The glazed and dried body is placed in an electric kiln for firing, which involves the following stages: First stage: The kiln temperature is raised from room temperature to 900℃ at a constant rate over 2 hours; the kiln temperature is then raised from 900℃ to 1350℃ at a constant rate over another 6 hours; when the temperature reaches 1180℃, 60-70g of instantaneous ignition pellets are added per cubic meter of kiln space, followed by 110-120g of diesel fuel per cubic meter of kiln space after a 5-minute interval, followed by another 60-70g of instantaneous ignition pellets per cubic meter of kiln space after a 5-minute interval. The ignition particles are a mixture of equal weights of chestnut shells and pine resin particles; Second stage: Keep warm at 1350℃ for 70 minutes; Third stage: After the heat preservation is completed, the furnace is shut down. When the kiln temperature drops to 1250℃, add 140-150g of oil and diesel per cubic meter of kiln space, once every 4 minutes, for a total of 3 times. Fourth stage: 10 minutes after the last oil and firewood are added, open the furnace door with a 4-6cm gap and keep it open for 30 minutes. Then close the furnace door and allow it to cool naturally before removing it from the kiln.

2. The Jianzhan (Jian ware) preparation process as described in claim 1, characterized in that: The instantaneous flammable particles are prepared by the following method: dried chestnut shells are crushed into 10-20 mesh chestnut shell powder, rosin is heated and dissolved, chestnut shell powder of equal weight to rosin is added, stirred evenly, and allowed to cool and solidify naturally; then it is broken into particles by tapping.

3. The Jianzhan (Jian ware) preparation process as described in claim 1 or 2, characterized in that: The wood ash is prepared by mixing dried camellia seed shells and chestnut wood blocks at a weight ratio of 1:10-12 and burning them to obtain ash.

4. The Jianzhan preparation process as described in claim 3, characterized in that: In step (2), the bisque firing process involves the kiln temperature rising from room temperature to 600℃ at a constant rate over 4 hours, followed by kiln shutdown and cooling.

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