Preparation Process of Watermelon Spotted Jianzhan

Abstract

The present invention discloses a preparation process for watermelon mottled Jianzhan, which comprises the following steps: preparing a blank body and glaze slurries, wherein the glaze slurries include a first glaze slurry and a second glaze slurry. First, apply the first glaze slurry and let it dry; then apply the second glaze slurry and let it dry; put the blank body after applying glaze and drying into an electric kiln for roasting. The watermelon mottled Jianzhan fired by the present invention has a black background color on the glaze surface, with yellowish-brown oil droplets and streak-like stripes intermingled. The streak-like stripes are as smooth and vivid as flowing clouds and water, and as natural as watermelon rind mottles. The oil droplets are dotted among them, with extremely high vitality and aesthetic feeling, thus having excellent artistic and collection value.

Description

Technical Field

[0001] The present invention relates to the technical field of porcelain, and specifically to the preparation process of Jianzhan. Background Art

[0002] The main types of Jianzhan are rabbit hair Jianzhan and oil drop Jianzhan. The currently reported methods for preparing Jianzhan have the following limitations: First, the firing of Jianzhan is difficult, and the firing process is difficult to master. Improper process selection often leads to many defects, such as blistering, deformation, cracking of the blank body, sticking of the glaze to the bottom, appearance of patches, a large number of pinholes on the glaze surface, etc., resulting in a low yield, thus reducing the artistic, collection and economic value of Jianzhan; Second, the glaze color pattern of Jianzhan is ordinary and the innovation is low.

[0003] Therefore, there is a need in this field to develop a preparation process for Jianzhan with beautiful and novel appearance and stable process. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation process for watermelon mottled Jianzhan, which has a beautiful and novel glaze surface and high artistic and collection value.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The preparation process of watermelon mottled Jianzhan includes the following steps:

[0007] (1) Prepare the blank body and glaze slurry. Among them,

[0008] The blank body is prepared by the following method: Mix 6.5 - 7.5 parts by weight of red clay, 1.5 - 2 parts by weight of kaolin, and 0.8 - 1.2 parts by weight of field mud to obtain blank soil. Crush, wash, and sieve the blank soil through a 90 - 100 mesh sieve, then press filter, refine the mud, and age it to obtain blank mud; Shape the blank mud by throwing, trim it, bisque fire it, and cool it to obtain the blank body;

[0009] The glaze slurry includes the first - stage glaze slurry and the second - stage glaze slurry;

[0010] The first - stage glaze slurry is prepared by the following method: Weigh 58 - 63 parts by weight of feldspar, 9 - 10 parts by weight of potassium feldspar, 5.5 - 6.5 parts by weight of limestone, 1.5 - 2.2 parts by weight of talc, 1.8 - 2.1 parts by weight of plant ash, and 78 - 85 parts by weight of water, add them to a ball mill for grinding, and sieve through a 100 - 110 mesh sieve to obtain the first - stage glaze slurry;

[0011] The second - stage glaze slurry is prepared by the following method: Weigh 1.8 - 2.2 parts by weight of red clay, 0.8 - 1.1 parts by weight of ochre, and 2.8 - 3.2 parts by weight of water, add them to a ball mill for grinding, and sieve through a 100 - 110 mesh sieve to obtain the second - stage glaze slurry;

[0012] (2) Glazing: First apply the first layer of glaze slurry. Do not glaze the bottom of the blank body cup, and glaze all other parts. The thickness of the glaze application is 0.3 - 0.4 mm, and let it dry. Then apply the second layer of glaze slurry, repeating the glaze application position of the first layer of glaze slurry. The thickness of the glaze application is 0.2 - 0.25 mm, and let it dry.

[0013] (3) Put the glazed and dried blank body into an electric kiln for roasting. The roasting process is as follows:

[0014] The first stage: The temperature of the kiln rises uniformly from room temperature to 980 - 1050 °C in 4.5 - 5.5 h; then the temperature of the kiln rises uniformly from 980 - 1050 °C to 1318 - 1320 °C in 2.5 - 3.5 h.

[0015] The second stage: Keep the temperature at 1318 - 1320 °C for 2 h. When the insulation reaches 1.5 h, put in oil firewood, put it in once every 3 minutes, a total of 7 times. The dosage of each oil firewood is 48 - 50 g for every 0.2 cubic meters of the kiln space.

[0016] The third stage: After the insulation ends, the temperature of the kiln rises uniformly to 1330 °C in 28 - 33 min, and keep the temperature at 1330 °C for 3 min.

[0017] The fourth stage: After the insulation ends, cut off the power; when the furnace temperature drops to 1140 - 1150 °C, open the kiln door for 28 - 35 min, and then close the kiln door and let it cool naturally until it comes out of the kiln.

[0018] Typically, the preparation process of the above-mentioned watermelon - flower - pattern Jianzhan includes the following steps:

[0019] (1) Prepare the blank body and glaze slurry. Among them,

[0020] The blank body is prepared by the following method: Mix 7 parts by weight of red clay, 2 parts by weight of kaolin, and 1 part by weight of field mud to obtain blank clay. Crush, wash, sieve through a 100 - mesh sieve, filter - press, knead the mud, and age it to obtain blank mud; shape the blank mud by throwing on the wheel, trim it, biscuit - fire it, and cool it to obtain the blank body.

[0021] The glaze slurry includes the first layer of glaze slurry and the second layer of glaze slurry;

[0022] The first layer of glaze slurry is prepared by the following method: Weigh 60 parts by weight of glaze stone, 10 parts by weight of potassium feldspar, 6 parts by weight of limestone, 2 parts by weight of talc, 2 parts by weight of plant ash, and 80 parts by weight of water, add them to a ball mill for grinding, and sieve through a 100 - 110 - mesh sieve to obtain the first layer of glaze slurry.

[0023] The second layer of glaze slurry is prepared by the following method: Weigh 2 parts by weight of red clay, 1 part by weight of ochre, and 3 parts by weight of water, add them to a ball mill for grinding, and pass through a 100 - 110 mesh sieve to obtain the second layer of glaze slurry;

[0024] (2) Glazing: First apply the first layer of glaze slurry. Do not glaze the bottom of the blank cup, and glaze other parts. The glazing thickness is 0.3 - 0.4 mm, and air dry; then apply the second layer of glaze slurry, repeat the glazing position of the first layer of glaze slurry, and the glazing thickness is 0.2 - 0.25 mm, and air dry;

[0025] (3) Put the glazed and air - dried blank into an electric kiln for roasting. The roasting process is as follows:

[0026] The first stage: The temperature of the kiln rises uniformly from room temperature to 1000 °C in 5 h; then the temperature of the kiln rises uniformly from 1000 °C to 1320 °C in 3 h;

[0027] The second stage: Keep the temperature at 1320 °C for 2 h. When the insulation reaches 1.5 h, put in oil firewood, put it once every 3 min, for a total of 7 times. The feeding amount of oil firewood each time is 50 g for every 0.2 cubic meters of kiln space;

[0028] The third stage: After the insulation ends, the temperature of the kiln rises uniformly to 1330 °C in 30 min, and keep the temperature at 1330 °C for 3 min;

[0029] The fourth stage: After the insulation ends, cut off the power; when the furnace temperature drops to 1150 °C, open the kiln door for 30 min, and then close the kiln door and let it cool naturally until it comes out of the kiln.

[0030] Furthermore, the red clay, kaolin, and field mud are all taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province, and the glaze stone is taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

[0031] Furthermore, the preparation method of the plant ash is: Burn oak to obtain ashes, and grind the ashes into powder.

[0032] After adopting the above - mentioned technical solution, the present invention has the following advantages:

[0033] 1. The watermelon - pattern Jianzhan fired by the present invention has a black background color on the glaze surface, with yellow - brown oil droplets and streak - like patterns intermingled. The streak - like patterns are as smooth and vivid as flowing clouds and water, and as natural as watermelon - skin patterns. The oil droplets are dotted among them, with excellent vitality and beauty, thus having excellent artistic and collection values.

[0034] 2. The technological process of the present invention is clear, easy to control, has good stability, and a relatively high finished - product rate. It can produce watermelon - pattern Jianzhan with excellent artistic effects, which can not only meet people's artistic appreciation needs but also enter ordinary people's homes, enriching people's daily lives. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a photo example of the Jianzhan obtained in Example 1 of the present invention (inner view of the bowl);

[0036] Figure 2 This is a photo example of the Jianzhan obtained in Example 1 of the present invention (outer view of the bowl);

[0037] Figure 3 This is a photo example of the Jianzhan obtained in Example 1 of the present invention (three-dimensional view). Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present 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 only used to explain the present invention and are not used to limit the present invention.

[0039] In the present invention, unless otherwise specified, all parts and percentages are in weight units, and all devices and raw materials can be purchased from the market or are commonly used in this industry. The methods in the following embodiments are conventional methods in this field if not otherwise specified.

[0040] Example 1

[0041] The preparation process of the watermelon mottled Jianzhan includes the following steps:

[0042] (1) Prepare the blank and glaze slurry. Among them,

[0043] The blank is prepared by the following method: Mix 7 parts by weight of red clay, 2 parts by weight of kaolin, and 1 part by weight of field mud to obtain blank soil. Crush, wash, sieve through a 100-mesh sieve, filter press, refine the mud, and age it to obtain blank mud; Shape the blank mud by throwing, trim it, bisque-fire it, and cool it to obtain the blank;

[0044] The glaze slurry includes the first glaze slurry and the second glaze slurry;

[0045] The first glaze slurry is prepared by the following method: Weigh 60 parts by weight of feldspar, 10 parts by weight of potassium feldspar, 6 parts by weight of limestone, 2 parts by weight of talc, 2 parts by weight of plant ash, and 80 parts by weight of water, add them to a ball mill for grinding, and sieve through a 100-110 mesh sieve to obtain the first glaze slurry;

[0046] The second glaze slurry is prepared by the following method: Weigh 2 parts by weight of red clay, 1 part by weight of ochre, and 3 parts by weight of water, add them to a ball mill for grinding, and sieve through a 100-110 mesh sieve to obtain the second glaze slurry;

[0047] (2) Glazing: First apply the first layer of glaze slurry. Do not glaze the bottom of the body cup, and glaze other parts. The thickness of the glaze application is 0.3 - 0.4 mm, and let it dry. Then apply the second layer of glaze slurry, repeating the glazing position of the first layer of glaze slurry. The thickness of the glaze application is 0.2 - 0.25 mm, and let it dry;

[0048] (3) Put the glazed and dried body into an electric kiln furnace for roasting. The roasting process is as follows:

[0049] The first stage: The temperature of the kiln furnace rises uniformly from room temperature to 1000 °C in 5 hours; then the temperature of the kiln furnace rises uniformly from 1000 °C to 1320 °C in 3 hours;

[0050] The second stage: Keep the temperature at 1320 °C for 2 hours. When the insulation reaches 1.5 hours, put in oil firewood, put it in once every 3 minutes, and put it in a total of 7 times. The amount of oil firewood put in each time is 50 g for every 0.2 cubic meters of the kiln furnace space;

[0051] The third stage: After the insulation ends, the temperature of the kiln furnace rises uniformly to 1330 °C in 30 minutes, and keep the temperature at 1330 °C for 3 minutes;

[0052] The fourth stage: After the insulation ends, cut off the power; when the furnace temperature drops to 1150 °C, open the kiln furnace door for 30 minutes, and then close the kiln furnace door to cool naturally until taking out of the kiln.

[0053] Furthermore, the red clay, kaolin and field mud are all taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province, and the glaze stone is taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

[0054] Furthermore, the preparation method of the plant ash is: burn oak wood to obtain ashes, and grind the ashes into powder.

[0055] This embodiment uses a kiln furnace with an internal space of 0.2 cubic meters for firing.

[0056] The oil firewood described in the present invention can burn violently at high temperature. The oil firewood is put in from the oil firewood inlet of the kiln furnace door. The oil firewood inlet is only opened when putting in oil firewood and is closed at other times. The orifice diameter of the oil firewood inlet is 10 - 15 cm.

[0057] Reference Figure 1 、 Figure 2 And Figure 3 , the watermelon flower - spotted Jianzhan fired in this embodiment has a black glaze surface background color, with yellow - brown oil droplets and streak - like patterns intermingled. The streak - like patterns are as smooth and vivid as flowing clouds and water, and as natural as watermelon rind flower patterns. The oil droplets are dotted among them, with extremely high vitality and beauty, thus having excellent artistic and collection value.

[0058] Examples 2 and 3

[0059] The Jianzhan is very sensitive to the preparation process parameters. Even a small change in the process parameters will have a great adverse impact on the appearance and other characteristics of the final product of the Jianzhan, and may even lead to the failure of Jianzhan preparation. Therefore, the requirements for the preparation process of Jianzhan are very strict. In Example 2 and Example 3, the watermelon-spotted Jianzhan was prepared according to the same preparation process as in Example 1. The characteristics of the watermelon-spotted Jianzhan prepared in Example 2 and Example 3 are basically the same as those of the watermelon-spotted Jianzhan prepared in Example 1. The results show that the method in Example 1 has good repeatability, strong stability and is easy to scale up production.

[0060] Comparative Example 1

[0061] The difference between this comparative example and Example 1 is that:

[0062] The third stage in step (3) is omitted.

[0063] For the Jianzhan obtained in this comparative example, the glaze surface is mainly oil droplets, with sparse short hairs, no watermelon rind patterns, and at the same time, the glossiness of the glaze surface is poor.

[0064] Comparative Example 2

[0065] The difference between this comparative example and Example 1 is that:

[0066] Third stage: After the heat preservation ends, the temperature of the kiln furnace rises uniformly to 1330 °C in 10 minutes, and is kept at 1330 °C for 3 minutes;

[0067] For the Jianzhan obtained in this comparative example, the glaze surface pattern is hair filaments and there is no watermelon rind pattern.

[0068] Comparative Example 3

[0069] The difference between this comparative example and Example 1 is that:

[0070] Only the first glaze slurry is prepared, the second glaze slurry is not prepared, and only the first glaze slurry is applied during glazing.

[0071] For the Jianzhan obtained in this comparative example, the glaze surface is several sparse oval oil droplet spots and there is no watermelon rind pattern.

[0072] Comparative Example 4

[0073] The difference between this comparative example and Example 1 is that:

[0074] The glaze slurry is prepared by the following method: Weigh 60 parts by weight of feldspar, 10 parts by weight of potassium feldspar, 6 parts by weight of limestone, 2 parts by weight of talc, 2 parts by weight of plant ash, 2 parts by weight of red clay, 1 part by weight of ochre and 83 parts by weight of water, add them to a ball mill for grinding, and pass through a 100-110 mesh sieve to obtain the first glaze slurry;

[0075] (2) Glazing: The bottom of the blank cup is not glazed, and the other parts are glazed. The glazing thickness is 0.5 - 0.65 mm, and then it is air-dried;

[0076] For the Jianzhan obtained in this comparative example, there are no oil-drop spots on the glaze surface, but dense streak-like patterns.

[0077] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. Preparation process of watermelon variegated Jianzhan, characterized in that: It includes the following steps: (1) Prepare the green body and glaze slurries. Among them, the green body is prepared by the following method: Mix 6.5 - 7.5 parts by weight of laterite, 1.5 - 2 parts by weight of kaolin, and 0.8 - 1.2 parts by weight of field mud to obtain the green clay. Crush, wash, and sieve the green clay through a 90 - 100 mesh sieve, then press - filter, knead the clay, and age it to obtain the green body clay. Shape the green body clay by throwing on the potter's wheel, trim it, bisque - fire it, and cool it to obtain the green body; the glaze slurries include the first - stage glaze slurry and the second - stage glaze slurry; the first - stage glaze slurry is prepared by the following method: Weigh 58 - 63 parts by weight of frit, 9 - 10 parts by weight of potassium feldspar, 5.5 - 6.5 parts by weight of limestone, 1.5 - 2.2 parts by weight of talc, 1.8 - 2.1 parts by weight of plant ash, and 78 - 85 parts by weight of water. Add them to a ball mill for grinding, and sieve through a 100 - 110 mesh sieve to obtain the first - stage glaze slurry; the second - stage glaze slurry is prepared by the following method: Weigh 1.8 - 2.2 parts by weight of laterite, 0.8 - 1.1 parts by weight of ochre, and 2.8 - 3.2 parts by weight of water. Add them to a ball mill for grinding, and sieve through a 100 - 110 mesh sieve to obtain the second - stage glaze slurry; (2) Glazing: First apply the first - stage glaze slurry. Do not glaze the bottom of the green body cup, and glaze other parts. The glazing thickness is 0.3 - 0.4 mm, and air - dry it. Then apply the second - stage glaze slurry, repeat the glazing position of the first - stage glaze slurry, and the glazing thickness is 0.2 - 0.25 mm, and air - dry it; (3) Put the air - dried and glazed green body into an electric kiln for roasting. The roasting process goes through the following stages: The first stage: The kiln temperature rises uniformly from room temperature to 980 - 1050 °C in 4.5 - 5.5 h; then the kiln temperature rises uniformly from 980 - 1050 °C to 1318 - 1320 °C in 2.5 - 3.5 h; The second stage: Keep the temperature at 1318 - 1320 °C for 2 h. When the insulation reaches 1.5 h, put in firewood oil, put it in once every 3 min, and put it in a total of 7 times. The feeding amount of firewood oil each time is 48 - 50 g for every 0.2 cubic meters of kiln space; The third stage: After the insulation ends, the kiln temperature rises uniformly to 1330 °C in 28 - 33 min, and keep the temperature at 1330 °C for 3 min; The fourth stage: After the insulation ends, cut off the power. When the furnace temperature drops to 1140 - 1150 °C, open the kiln door for 28 - 35 min, and then close the kiln door and let it cool naturally until it comes out of the kiln.

2. The preparation process of the watermelon-patterned Jianzhan according to claim 1, characterized in that: It includes the following steps: (1) Prepare the green body and glaze slurries. Among them, the green body is prepared by the following method: Mix 7 parts by weight of laterite, 2 parts by weight of kaolin, and 1 part by weight of field mud to obtain the green clay. Crush, wash, and sieve the green clay through a 100 - mesh sieve, then press - filter, knead the clay, and age it to obtain the green body clay. Shape the green body clay by throwing on the potter's wheel, trim it, bisque - fire it, and cool it to obtain the green body; the glaze slurries include the first - stage glaze slurry and the second - stage glaze slurry; the first - stage glaze slurry is prepared by the following method: Weigh 60 parts by weight of frit, 10 parts by weight of potassium feldspar, 6 parts by weight of limestone, 2 parts by weight of talc, 2 parts by weight of plant ash, and 80 parts by weight of water. Add them to a ball mill for grinding, and sieve through a 100 - 110 mesh sieve to obtain the first - stage glaze slurry; The second glaze slurry is prepared by the following method: Weigh 2 parts by weight of red clay, 1 part by weight of ochre and 3 parts by weight of water, add them to a ball mill for grinding, and pass through a 100-110 mesh sieve to obtain the second glaze slurry; (2) Glazing: First apply the first glaze slurry, without glazing the bottom of the blank cup, and glaze all other parts. The glazing thickness is 0.3-0.4 mm, and let it dry. Then apply the second glaze slurry, repeat the glazing position of the first glaze slurry, and the glazing thickness is 0.2-0.25 mm, and let it dry; (3) Place the glazed and dried blank into an electric kiln for roasting. The roasting process passes through the following stages: The first stage: The temperature of the kiln rises from room temperature to 1000 °C at a uniform speed in 5 h; then the temperature of the kiln rises from 1000 °C to 1320 °C at a uniform speed in 3 h; The second stage: Keep the temperature at 1320 °C for 2 h. When the insulation reaches 1.5 h, put in firewood oil, put it in once every 3 minutes, and put it in a total of 7 times. The amount of firewood oil put in each time is 50 g for every 0.2 cubic meters of the kiln space; The third stage: After the insulation is over, the temperature of the kiln rises to 1330 °C at a uniform speed in 30 minutes, and keep the temperature at 1330 °C for 3 minutes; The fourth stage: After the insulation is over, cut off the power. When the furnace temperature drops to 1150 °C, open the kiln door for 30 minutes, and then close the kiln door and let it cool naturally until it comes out of the kiln.

3. The preparation process of the watermelon mottled Jianzhan according to claim 1 or 2, characterized in that: The red clay, kaolin and field mud are all taken from Shuiji Town, Jianyang District, Nanping City, Fujian Province, and the glaze stone is taken from Nanlin Village, Jianyang District, Nanping City, Fujian Province.

4. The preparation process of the watermelon mottled Jianzhan according to claim 3, characterized in that: The preparation method of the plant ash is: Burn oak to obtain ashes, and grind the ashes into powder.

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