A food-contactable sacrificial blue ceramic glaze and its application method

Abstract

The present invention relates to a food-contact sacrificial blue ceramic glaze and its application method. The sacrificial blue ceramic glaze is made from natural minerals and consists of the following composition by weight: quartz 18-24%, Leping glaze slip 10-14%, potassium feldspar 32-36%, calcined talc 8-12%, limestone 10-16%, zircon sand 5-8%, zinc oxide 1-2%, and prefabricated frit 3-6%. The prefabricated frit is composed of the following raw materials by weight: blue line stone 40-50%, apatite 11-16%, kaolin 8-12%, cobalt 5-8%, borax 6-10%, and potassium carbonate 12-16%. The sacrificial blue ceramic glaze decorative product, which is suitable for food contact, is obtained by preparing the frit, preparing the glaze slip, applying the glaze, drying, firing, and soaking in an acetic acid solution. The present invention features a simple process, low cost, pure color, and stable performance, and therefore has broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of traditional ceramic material manufacturing, and in particular to a food-contactable sacrificial blue ceramic glaze and an application method thereof. Background Art

[0002] Jilan glaze, also known as Jilan glaze, Jilan glaze, Gemstone Blue glaze, or Jiqing glaze, is one of China's traditional precious colored glazes, first created at the Jingdezhen kilns during the Yuan Dynasty. It is highly valued for its deep, even blue color. It is also an excellent ceramic decorative material, offering excellent corrosion resistance and resistance to strong alkaline detergents. In recent years, it has attracted increasing attention and is widely used in the decoration of ordinary everyday porcelain, particularly personalized tableware and tea sets.

[0003] However, when using sacrificial blue-glazed ceramics for food contact applications, the migration of harmful elements from the glaze has become a key concern. Traditional preparation methods use cobalt ions as a colorant, potentially introducing other elements harmful to the human body. These migration levels are difficult to effectively control. If applied to tableware or tea sets, this could easily lead to excessive migration of these harmful elements, potentially failing to meet national standards and potentially harming consumer health.

[0004] Currently, some researchers in China are experimenting with using lead-free and cadmium-free raw materials and cobalt-free formulas to formulate sacrificial blue glaze. However, most of these efforts are still in the laboratory research stage. Application to mass production is prone to various defects, such as pinholes and uneven glaze flow, which affect both aesthetics and practicality, resulting in low yields and, therefore, precludes practical application. Furthermore, there are no reports on the migration of harmful elements in sacrificial blue glaze ceramics or their compatibility with food. Therefore, developing new sacrificial blue glaze ceramics that are mass-producible, have high yields, are harmless to humans and the environment, and are compatible with food contact has become an urgent task, with significant economic and social benefits. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a food-contact sacrificial blue ceramic glaze with simple preparation process, low cost, pure color and stable performance, and an application method thereof.

[0006] The present invention is realized by the following technical scheme: a food-contact sacrificial blue ceramic glaze, characterized in that the sacrificial blue ceramic glaze is made of natural minerals and its weight percentage composition is: quartz 18-24%, Leping glaze mud 10-14%, potassium feldspar 32-36%, calcined talc 8-12%, limestone 10-16%, zircon sand 5-8%, zinc oxide 1-2%, prefabricated frit 3-6%;

[0007] The raw materials of the prefabricated frit are composed of 40-50% bluestone, 11-16% apatite, 8-12% kaolin, 5-8% cobaltite, 6-10% borax and 12-16% potassium carbonate in percentage by weight.

[0008] The method for applying the food-contactable sacrificial blue ceramic glaze is characterized by following the steps:

[0009] Step 1: weigh the prefabricated frit according to the weight percentage of its formula raw materials, put it into an alumina crucible after thorough mixing, and then place it in a kiln for calcination. Then, take out the melt from the high temperature and quickly cool it in cold water. Finally, crush, grind and sieve the cooled frit to obtain the prefabricated frit for use;

[0010] Step 2: Weigh the sacrificial blue ceramic glaze according to the weight percentage of its formula raw materials, put it into a ball mill after thorough mixing, perform wet ball milling, and sieve to obtain the sacrificial blue ceramic glaze slurry;

[0011] Step 3: Apply the sacrificial blue ceramic glaze slurry obtained in step 2 to the ceramic green body and dry it at a temperature of 100-120°C for 2-4 hours;

[0012] Step 4: Place the dried glaze blank in the kiln for high-temperature firing, and then cool it naturally to room temperature after annealing to obtain a porcelain body decorated with sacrificial blue ceramic glaze;

[0013] Step 5: Soak the porcelain body obtained in step 4 in a 0.5 mol / L acetic acid solution for 18 to 24 hours, and then wash it with water to obtain a sacrificial blue ceramic glaze decorative product that can come into contact with food.

[0014] The calcination temperature in the step 1 is 1350-1400° C. and the temperature is kept for 1-2 hours.

[0015] The mesh number of the frit in the step 1 is 100-200 meshes, and the sieve residue is ≤0.05%.

[0016] The wet ball milling process parameters of the sacrificial blue ceramic glaze in step 2 are: the weight ratio of raw materials, water and balls is 1:0.8 to 1:1, and the ball milling time is 8 to 12 hours.

[0017] The mesh number of the sacrificial blue ceramic glaze in the step 2 is 200-300 meshes, and the sieve residue is ≤0.05%.

[0018] In the step 3, the sacrificial blue ceramic glaze slurry is glazed by spraying, and the thickness of the glaze layer is 1 to 2 mm.

[0019] The raw materials of the ceramic green body in step 3 are composed of 60-80% porcelain stone and 20-40% kaolin by weight.

[0020] The high temperature firing system in step 4 is as follows: heating from room temperature to 900-1000°C over 6-8 hours, then heating to 1250-1300°C over 4-5 hours, keeping the temperature for 1-2 hours, then annealing to 1050-1100°C, and naturally cooling to room temperature.

[0021] The performance parameters of the sacrificial blue ceramic glaze decorative products in the step five are: glossiness ≥85; acid and alkali resistance: Class A; microwave oven adaptability: passed; thermal shock resistance: no damage after one heat exchange from 160°C to 20°C; migration of harmful elements: lead not detected; cadmium not detected; chromium not detected; nickel not detected; antimony not detected; zinc not detected; arsenic not detected; cobalt not detected; barium not detected.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The food-contact sacrificial blue ceramic glaze of the present invention is designed to contain no elements that are toxic to the human body and the environment. The raw materials are natural minerals and chemical raw materials that do not contain elements that are toxic to the human body and the environment. The introduction of elements that are toxic to the human body and the environment is eliminated from the source, and the harm to the human body and the environment during the preparation process is avoided. By prefabricating a melt at high temperature with blue natural minerals such as blue line stone and apatite and a small amount of cobalt-containing minerals, the migration of the cobalt element can be effectively controlled.

[0024] 2. The present invention uses a method of prefabricating color-producing frits to make a variety of blue natural minerals react at high temperature to form silicate products such as blue spinel, which can be used as a color-producing agent for sacrificial blue to make the color more stable.

[0025] 3. The blue thread stone introduced into the frit of the present invention serves as the main colorant of sacrificial blue. The iron (Fe) and titanium (Ti) impurities therein form a stable blue color when fired at high temperature through the crystal field effect, replacing most of the cobalt element in traditional sacrificial blue. The introduction of cobalt element in the glaze formula is reduced by about 80% compared with the traditional sacrificial blue formula, while maintaining the deep sacrificial blue color.

[0026] 4. The Leping glaze slip incorporated into the glaze formulation of this invention is a mixture of natural minerals produced in the Leping area of ​​Jingdezhen. It contains low levels of iron oxide and titanium oxide impurities. The glaze slip forms a stable glass network at high temperatures, providing a uniform dispersion medium for the sacrificial blue frit made from blue thread stone. It also allows the glaze to flow appropriately during melting, forming a smooth, dense glaze surface and making the sacrificial blue glaze color more uniform. The off-white color of the glaze slip neutralizes the cool tones of the sacrificial blue frit made from blue thread stone, making the sacrificial blue color of this invention more similar to the depth of traditional sacrificial blue.

[0027] 5. The present invention uses an acetic acid solution to soak fired ceramic products to dissolve residual harmful elements in the sacrificial blue ceramic glaze, further reducing the international concern of harmful element migration in ceramic products, and ultimately ensuring that the amount of harmful element migration in the sacrificial blue ceramic glaze that can come into contact with food does not reach the detection limit.

[0028] The sacrificial blue ceramic glaze prepared by the present invention has a deep and uniform color and good artistic effect and ornamental value. At the same time, the preparation method is simple in process, easy to control, suitable for large-scale industrial production, and has broad market prospects. DETAILED DESCRIPTION

[0029] In order to further illustrate the present invention and the technical means and effects adopted to achieve the predetermined purpose of the invention, the present invention is described in detail below in conjunction with preferred embodiments.

[0030] Example 1

[0031] A food-contactable sacrificial blue ceramic glaze, the sacrificial blue ceramic glaze is made of natural minerals and is composed of 20% quartz, Leping glaze mud, and 20% quartz. 14%, potassium feldspar 32%, calcined talc 12%, limestone 10%, zircon sand 6%, zinc oxide 1%, prefabricated frit 5%;

[0032] The raw materials of the prefabricated frit are composed of 48% bluestone, 15% apatite, 9% kaolin, 6% cobaltite, 10% borax and 12% potassium carbonate by weight.

[0033] The method for applying the food-contactable sacrificial blue ceramic glaze is as follows:

[0034] Step 1: weigh the prefabricated frit according to the weight percentage of its formula raw materials, put it into an alumina crucible after thorough mixing, and then place it in a kiln for calcination. Then, take out the melt from the high temperature and quickly cool it in cold water. Finally, crush, grind and sieve the cooled frit to obtain the prefabricated frit for use;

[0035] Step 2: Weigh the sacrificial blue ceramic glaze according to the weight percentage of its formula raw materials, put it into a ball mill after thorough mixing, perform wet ball milling, and sieve to obtain the sacrificial blue ceramic glaze slurry;

[0036] Step 3: Apply the sacrificial blue ceramic glaze slurry obtained in step 2 to the ceramic green body and dry it at 100°C for 4 hours;

[0037] Step 4: Place the dried glaze blank in the kiln for high-temperature firing, and then cool it naturally to room temperature after annealing to obtain a porcelain body decorated with sacrificial blue ceramic glaze;

[0038] Step 5: Soak the porcelain body obtained in step 4 in a 0.5 mol / L acetic acid solution for 24 hours, and then wash it with water to obtain a sacrificial blue ceramic glaze decorative product that can come into contact with food.

[0039] The calcination temperature in the step 1 is 1350° C. and the temperature is kept for 1.5 hours.

[0040] The mesh number of the frit in the step 1 is 200 mesh, and the sieve residue is 0.04%.

[0041] The wet ball milling process parameters of the sacrificial blue ceramic glaze in step 2 are: the weight ratio of raw materials, water, and balls is 1:0.9:1, and the ball milling time is 10 hours.

[0042] The mesh number of the sacrificial blue ceramic glaze in the step 2 is 250 meshes, and the sieve residue is 0.03%.

[0043] In the step three, the sacrificial blue ceramic glaze slurry is glazed by spraying, and the thickness of the glaze layer is 1.5 mm.

[0044] The raw materials of the ceramic green body in step 3 are composed of 70% porcelain stone and 30% kaolin by weight.

[0045] The high temperature firing system in step 4 is as follows: heating from room temperature to 900° C. over 6 hours, then heating to 1280° C. over 5 hours, keeping the temperature for 1 hour, then annealing to 1100° C., and naturally cooling to room temperature.

[0046] The performance parameters of the sacrificial blue ceramic glaze decorative products in the step 5 are: glossiness 93; acid and alkali resistance: Grade A; microwave oven adaptability: passed; thermal shock resistance: no damage after one heat exchange from 160°C to 20°C; migration of harmful elements: lead not detected; cadmium not detected; chromium not detected; nickel not detected; antimony not detected; zinc not detected; arsenic not detected; cobalt not detected; barium not detected.

[0047] Example 2

[0048] A food-contactable sacrificial blue ceramic glaze, the sacrificial blue ceramic glaze is made of natural minerals and is composed of 18% quartz and Leping glaze mud by weight. 11%, potassium feldspar 36%, calcined talc 10%, limestone 11%, zircon sand 6%, zinc oxide 2%, prefabricated frit 6%;

[0049] The raw materials of the prefabricated frit are composed of 40% bluestone, 16% apatite, 12% kaolin, 8% cobaltite, 9% borax and 15% potassium carbonate by weight.

[0050] The method for applying the food-contactable sacrificial blue ceramic glaze is as follows:

[0051] Step 1: weigh the prefabricated frit according to the weight percentage of its formula raw materials, put it into an alumina crucible after thorough mixing, and then place it in a kiln for calcination. Then, take out the melt from the high temperature and quickly cool it in cold water. Finally, crush, grind and sieve the cooled frit to obtain the prefabricated frit for use;

[0052] Step 2: Weigh the sacrificial blue ceramic glaze according to the weight percentage of its formula raw materials, put it into a ball mill after thorough mixing, perform wet ball milling, and sieve to obtain the sacrificial blue ceramic glaze slurry;

[0053] Step 3: Apply the sacrificial blue ceramic glaze slurry obtained in step 2 to the ceramic green body and dry it at 120°C for 2 hours;

[0054] Step 4: Place the dried glaze blank in the kiln for high-temperature firing, and then cool it naturally to room temperature after annealing to obtain a porcelain body decorated with sacrificial blue ceramic glaze;

[0055] Step 5: Soak the porcelain body obtained in step 4 in a 0.5 mol / L acetic acid solution for 20 hours, and then wash it with water to obtain a sacrificial blue ceramic glaze decorative product that can come into contact with food.

[0056] The calcination temperature in the step 1 is 1400° C. and the temperature is kept for 1 hour.

[0057] The mesh number of the frit in the step 1 is 100 mesh, and the sieve residue is 0.02%.

[0058] The wet ball milling process parameters of the sacrificial blue ceramic glaze in step 2 are: the weight ratio of raw materials, water and balls is 1:0.8:1, and the ball milling time is 12 hours.

[0059] The mesh number of the sacrificial blue ceramic glaze in the step 2 is 300 meshes, and the sieve residue is 0.05%.

[0060] In the step three, the sacrificial blue ceramic glaze slurry is glazed by spraying, and the thickness of the glaze layer is 1 mm.

[0061] The raw materials of the ceramic green body in step 3 are composed of 60% porcelain stone and 40% kaolin by weight.

[0062] The high temperature firing system in step 4 is as follows: heating from room temperature to 950° C. over 7 hours, then heating to 1300° C. over 4.5 hours, keeping the temperature for 1 hour, then annealing to 1050° C., and naturally cooling to room temperature.

[0063] The performance parameters of the sacrificial blue ceramic glaze decorative products in the step 5 are: glossiness 92; acid and alkali resistance: Grade A; microwave oven adaptability: passed; thermal shock resistance: no damage after one heat exchange from 160°C to 20°C; migration of harmful elements: lead not detected; cadmium not detected; chromium not detected; nickel not detected; antimony not detected; zinc not detected; arsenic not detected; cobalt not detected; barium not detected.

[0064] Example 3

[0065] A food-contact sacrificial blue ceramic glaze, the sacrificial blue ceramic glaze being made from natural minerals and comprising, by weight, 19% quartz, 12% Leping glaze slip, 33% potassium feldspar, 10% calcined talc, 16% limestone, 5% zircon sand, 1% zinc oxide, and 4% prefabricated frit;

[0066] The raw materials of the prefabricated frit are composed of 45% bluestone, 16% apatite, 8% kaolin, 7% cobaltite, 10% borax and 14% potassium carbonate by weight.

[0067] The method for applying the food-contactable sacrificial blue ceramic glaze is as follows:

[0068] Step 1: weigh the prefabricated frit according to the weight percentage of its formula raw materials, put it into an alumina crucible after thorough mixing, and then place it in a kiln for calcination. Then, take out the melt from the high temperature and quickly cool it in cold water. Finally, crush, grind and sieve the cooled frit to obtain the prefabricated frit for use;

[0069] Step 2: Weigh the sacrificial blue ceramic glaze according to the weight percentage of its formula raw materials, put it into a ball mill after thorough mixing, perform wet ball milling, and sieve to obtain the sacrificial blue ceramic glaze slurry;

[0070] Step 3: Apply the sacrificial blue ceramic glaze slurry obtained in step 2 to the ceramic green body and dry it at 110°C for 3 hours;

[0071] Step 4: Place the dried glaze blank in the kiln for high-temperature firing, and then cool it naturally to room temperature after annealing to obtain a porcelain body decorated with sacrificial blue ceramic glaze;

[0072] Step 5: Soak the porcelain body obtained in step 4 in a 0.5 mol / L acetic acid solution for 18 hours, and then wash it with water to obtain a sacrificial blue ceramic glaze decorative product that can come into contact with food.

[0073] The calcination temperature in the step 1 is 1350° C. and the temperature is kept for 2 hours.

[0074] The mesh number of the frit in the step 1 is 150 mesh, and the sieve residue is 0.04%.

[0075] The wet ball milling process parameters of the sacrificial blue ceramic glaze in step 2 are: the weight ratio of raw materials, water and balls is 1:1:1, and the ball milling time is 8 hours.

[0076] The mesh number of the sacrificial blue ceramic glaze in the step 2 is 200 meshes, and the sieve residue is 0.02%.

[0077] In the step three, the sacrificial blue ceramic glaze slurry is glazed by spraying, and the thickness of the glaze layer is 2 mm.

[0078] The raw materials of the ceramic green body in step 3 are composed of 80% porcelain stone and 20% kaolin by weight.

[0079] The high temperature firing system in step 4 is as follows: heating from room temperature to 1000° C. over 8 hours, then heating to 1250° C. over 4 hours, keeping the temperature for 2 hours, then annealing to 1080° C., and naturally cooling to room temperature.

[0080] The performance parameters of the sacrificial blue ceramic glaze decorative products in the step 5 are: glossiness 85; acid and alkali resistance: Class A; microwave oven adaptability: passed; thermal shock resistance: no damage after one heat exchange from 160°C to 20°C; migration of harmful elements: lead not detected; cadmium not detected; chromium not detected; nickel not detected; antimony not detected; zinc not detected; arsenic not detected; cobalt not detected; barium not detected.

[0081] Example 4

[0082] A food-contactable sacrificial blue ceramic glaze, the sacrificial blue ceramic glaze is made of natural minerals and is composed of 24% quartz and Leping glaze mud by weight. 10%, potassium feldspar 34%, calcined talc 8%, limestone 11.5%, zircon sand 8%, zinc oxide 1.5%, prefabricated frit 3%;

[0083] The raw materials of the prefabricated frit are composed of 50% bluestone, 11% apatite, 12% kaolin, 5% cobaltite, 6% borax and 16% potassium carbonate by weight.

[0084] The method for applying the food-contactable sacrificial blue ceramic glaze is as follows:

[0085] Step 1: weigh the prefabricated frit according to the weight percentage of its formula raw materials, put it into an alumina crucible after thorough mixing, and then place it in a kiln for calcination. Then, take out the melt from the high temperature and quickly cool it in cold water. Finally, crush, grind and sieve the cooled frit to obtain the prefabricated frit for use;

[0086] Step 2: Weigh the sacrificial blue ceramic glaze according to the weight percentage of its formula raw materials, put it into a ball mill after thorough mixing, perform wet ball milling, and sieve to obtain the sacrificial blue ceramic glaze slurry;

[0087] Step 3: Apply the sacrificial blue ceramic glaze slurry obtained in step 2 to the ceramic green body and dry it at 100°C for 4 hours;

[0088] Step 4: Place the dried glaze blank in the kiln for high-temperature firing, and then cool it naturally to room temperature after annealing to obtain a porcelain body decorated with sacrificial blue ceramic glaze;

[0089] Step 5: Soak the porcelain body obtained in step 4 in a 0.5 mol / L acetic acid solution for 20 hours, and then wash it with water to obtain a sacrificial blue ceramic glaze decorative product that can come into contact with food.

[0090] The calcination temperature in the step 1 is 1380° C. and the temperature is kept for 1 hour.

[0091] The mesh number of the frit in the step 1 is 200 mesh, and the sieve residue is 0.03%.

[0092] The wet ball milling process parameters of the sacrificial blue ceramic glaze in step 2 are: the weight ratio of raw materials, water and balls is 1:1:1, and the ball milling time is 10 hours.

[0093] The mesh number of the sacrificial blue ceramic glaze in the step 2 is 300 meshes, and the sieve residue is 0.04%.

[0094] In the step three, the sacrificial blue ceramic glaze slurry is glazed by spraying, and the thickness of the glaze layer is 2 mm.

[0095] The raw materials of the ceramic green body in step 3 are composed of 65% porcelain stone and 35% kaolin by weight.

[0096] The high temperature firing system in step 4 is as follows: heating from room temperature to 900° C. over 7 hours, then heating to 1290° C. over 5 hours, keeping the temperature for 1.5 hours, then annealing to 1100° C., and naturally cooling to room temperature.

[0097] The performance parameters of the sacrificial blue ceramic glaze decorative products in the step 5 are: glossiness 94; acid and alkali resistance: Grade A; microwave oven adaptability: passed; thermal shock resistance: no damage after one heat exchange from 160°C to 20°C; migration of harmful elements: lead not detected; cadmium not detected; chromium not detected; nickel not detected; antimony not detected; zinc not detected; arsenic not detected; cobalt not detected; barium not detected.

Claims

1. A food-contactable sacrificial blue ceramic glaze, characterized by: The glaze of Jilan ceramics is made of natural minerals, and its weight percentage composition is: quartz 18-24%, Leping glaze mud 10-14%, potassium feldspar 32-36%, calcined talc 8-12%, limestone 10-16%, zircon sand 5-8%, zinc oxide 1-2%, prefabricated frit 3-6%; The raw materials of the prefabricated frit are composed of 40-50% bluestone, 11-16% apatite, 8-12% kaolin, 5-8% cobaltite, 6-10% borax and 12-16% potassium carbonate in percentage by weight.

2. The method for applying the food-contactable sacrificial blue ceramic glaze according to claim 1, characterized in that Follow these steps: Step 1: weigh the prefabricated frit according to the weight percentage of its formula raw materials, put it into an alumina crucible after thorough mixing, and then place it in a kiln for calcination. Then, take out the melt from the high temperature and quickly cool it in cold water. Finally, crush, grind and sieve the cooled frit to obtain the prefabricated frit for use; Step 2: Weigh the sacrificial blue ceramic glaze according to the weight percentage of its formula raw materials, put it into a ball mill after thorough mixing, perform wet ball milling, and sieve to obtain the sacrificial blue ceramic glaze slurry; Step 3: Apply the sacrificial blue ceramic glaze slurry obtained in step 2 to the ceramic green body and dry it at a temperature of 100-120°C for 2-4 hours; Step 4: Place the dried glaze blank in the kiln for high-temperature firing, and then cool it naturally to room temperature after annealing to obtain a porcelain body decorated with sacrificial blue ceramic glaze; Step 5: Soak the porcelain body obtained in step 4 in a 0.5 mol / L acetic acid solution for 18 to 24 hours, and then wash it with water to obtain a sacrificial blue ceramic glaze decorative product that can come into contact with food.

3. The application method according to claim 2, characterized in that: The calcination temperature in the step 1 is 1350-1400° C. and the temperature is kept for 1-2 hours.

4. The application method according to claim 2, characterized in that: The mesh number of the frit in the step 1 is 100-200 mesh, and the sieve residue is ≤0.05%.

5. The application method according to claim 2, characterized in that: The wet ball milling process parameters of the sacrificial blue ceramic glaze in step 2 are: the weight ratio of raw materials, water and balls is 1:0.8 to 1:1, and the ball milling time is 8 to 12 hours.

6. The application method according to claim 2, characterized in that: The mesh number of the sacrificial blue ceramic glaze in the step 2 is 200-300 meshes, and the sieve residue is ≤0.05%.

7. The application method according to claim 2, characterized in that: In the step 3, the sacrificial blue ceramic glaze slurry is glazed by spraying, and the thickness of the glaze layer is 1 to 2 mm.

8. The application method according to claim 2, characterized in that: The raw materials of the ceramic green body in step 3 are composed of 60-80% porcelain stone and 20-40% kaolin by weight.

9. The application method according to claim 2, characterized in that: The high temperature firing system in step 4 is as follows: heating from room temperature to 900-1000°C over 6-8 hours, then heating to 1250-1300°C over 4-5 hours, keeping the temperature for 1-2 hours, then annealing to 1050-1100°C, and naturally cooling to room temperature.

10. The application method according to claim 2, characterized in that: The performance parameters of the blue ceramic glaze decorative product in step 5 are: glossiness ≥ 85; acid and alkali resistance: Class A; microwave adaptability: passed; Thermal shock resistance: No damage after one heat exchange from 160℃ to 20℃; Harmful element migration: No lead detected; No cadmium detected; No chromium detected; No nickel detected; Antimony was not detected; Zinc was not detected; Arsenic was not detected; Cobalt was not detected; barium was not detected.