Process for making a ceramic plate with writing in slip

Abstract

The application relates to the technical field of ceramic decoration processes, and discloses a mud plate glaze writing character ceramic manufacturing process, which comprises the following steps: 1) preparing a ceramic mud plate blank body: after kneading and exhausting ceramic mud, the ceramic mud is pressed into a flat mud plate, and the mud plate is naturally air-dried to a semi-dry blank body state; 2) on the surface of the semi-dry mud plate blank body, a character groove is engraved according to the stroke trend of a character brush, and the depth of the groove changes with the thickness of the stroke, the starting stroke and the ending stroke; the depth and the width of the groove change synchronously with the thickness of the stroke, the starting stroke, the ending stroke and the turning shape, so that a special-shaped groove simulating the characteristics of a brush writing stroke is formed; and 3) only the character groove engraved is accurately glazed, so that the glaze is accumulated in the groove and does not overflow to the blank body plane area; the glaze is filled in the groove, and the glaze does not overflow and does not contaminate the blank body plane area. The process sequence is innovative: the groove is engraved first, and then the glaze is locally applied, which is different from the traditional glaze writing and blank body carving process.

Description

Technical Field

[0001] This invention relates to the field of ceramic decoration technology, specifically a process for making ceramic slabs with glazed characters for writing. Background Technology

[0002] Existing methods of ceramic text decoration are mainly divided into three categories: overglaze writing, unglazed engraving, and conventional glaze filling and coloring. Each of these processes has insurmountable technical defects. Overglaze writing: The glaze is only physically attached to the surface of the body, without any three-dimensional texture. The brushstrokes are stiff and rigid, and the glaze layer has weak adhesion. It is easy to wear off and peel off after long-term use, resulting in poor durability. Unglazed carving: The text is formed solely by carving techniques. The unglazed body is not covered by a glaze layer. The surface is dry and lacks a translucent and warm glaze. It only has a single carved texture and a single dimension of artistic expression. Conventional glazing process: mostly adopts a straight groove structure of uniform depth, with no change in groove depth. The glazing method is to apply the color to a large area in a flat coating. The glaze is very easy to overflow and flow onto the surface of the body, which cannot simulate the natural strokes of a brush, such as thickness, weight, and pauses, and it is difficult to form a natural three-dimensional handwriting effect.

[0003] Traditional high-temperature colored glaze application techniques are insufficient to clearly and completely present the strokes of characters. Therefore, only underglaze, blue and white, and overglaze glazes are used for calligraphy creation, but there is no form of calligraphy creation directly using high-temperature colored glazes.

[0004] In summary, existing ceramic lettering decoration techniques cannot simultaneously achieve: dynamically changing brushstroke texture, a warm and lustrous glaze, and a natural three-dimensional raised effect; these three aspects are incompatible. Currently, the industry has not publicly disclosed a complete process for creating three-dimensional glazed lettering by carving irregularly shaped grooves that dynamically change with the brushstrokes onto semi-dry clay slabs, precisely filling the space within these grooves to allow for glaze deposition, and then relying on melting and stacking to form the final product. Most existing ceramic grooved and glazed designs use uniformly deep, straight grooves that only serve a basic function of containing the glaze; their design purpose is merely for color decoration, lacking any structural adaptation to fit the writing brushstrokes.

[0005] To address this issue, we have proposed a clay slab glaze writing ceramic production process. Summary of the Invention

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a process for producing ceramic slabs with glazed clay for writing characters, thus solving the problems mentioned in the background section.

[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a process for making ceramic slabs with glazed clay for writing characters, comprising the following steps: 1) Preparation of ceramic clay slab blanks: After kneading and degassing the ceramic clay, press it into flat clay slabs and let it air dry naturally until it reaches a semi-dry blank state; 2) On the surface of the semi-dry clay slab, grooves are carved to form characters according to the stroke direction of the characters. The depth of the grooves varies with the thickness of the strokes and the beginning and ending strokes. The depth and width of the grooves change synchronously with the thickness of the strokes, the beginning, ending strokes, and the turning shape, forming irregular grooves that simulate the pauses and pausing characteristics of brush writing. 3) Apply glaze precisely only inside the grooves formed by the carving, so that the glaze accumulates in the grooves and does not spill onto the flat area of ​​the body; control the glaze to fill the grooves so that the glaze does not spill or stain the flat area of ​​the body. 4) A layer of transparent glaze can be applied to the entire body. After high-temperature firing, the glaze melts and solidifies in the groove to form three-dimensional glaze writing text. The glaze melts, accumulates and solidifies in the confined space of the groove. The glaze surface is raised by the limiting glaze accumulation effect of the groove, thus producing three-dimensional glaze writing text that combines the texture of carving and the glossy texture of glaze.

[0008] Preferably, in step 2), the engraving depth of the text groove is 0.3-1.2mm.

[0009] Preferably, in step 2), the depth of the text groove engraving is controlled to be 0.3-1.2mm. The groove depth is greater for thick strokes and smaller for thin strokes and the end of strokes. The groove depth is positively correlated with the thickness of the strokes.

[0010] Preferably, in step 3), the groove is locally glazed using dotting or dipping methods, and the thickness of the glaze layer is controlled to match the thickness of the strokes.

[0011] Preferably, in step 3), a local glazing method of dotting or dipping is used, and the amount of glaze is matched according to the volume of the groove so that the thickness of the glaze layer changes synchronously with the depth of the groove.

[0012] Preferably, after firing, the text relies on the glaze pooling in the grooves to form a raised glaze effect, combining the texture of carving with the glossy texture of glaze.

[0013] Preferably, after firing in step 4), the glaze melts and expands and is constrained by the sidewall of the groove, forming a permanent glaze protrusion in the text area relative to the flat surface of the body. The height of the protrusion is determined by the groove depth and the glaze melt expansion coefficient.

[0014] Preferably, the moisture content of the semi-dry blank is controlled at 12%-18%, and the softness and hardness of the blank are suitable for carving to ensure that the edges of the groove are smooth and free of cracks.

[0015] Preferably, the firing temperature in step 4) is 1250-1320℃. Under high temperature, the glaze fully melts and flows and accumulates evenly in the groove, resulting in a dense and glossy glaze surface.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a process for making ceramic slabs with glazed clay for writing characters, which has the following beneficial effects: 1. Innovative process sequence: The process involves carving grooves first and then applying glaze to specific areas, which differs from traditional overglaze writing and unglazed carving techniques.

[0017] 2. Unique effect: The glaze is deposited in grooves, and the glaze melts and accumulates to form the original handwriting brush tip, which has both the texture of carving and the transparent luster of the glaze surface.

[0018] 3. It has a wide range of applications and can be used for porcelain paintings, ceramic ornaments, tea trays, cultural and creative decorations, etc. It has high artistic recognition and strong novelty. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 A process for making ceramic slabs with glazed clay for writing characters includes the following steps: 1) Select kaolin ceramic clay, knead it manually more than 5 times to fully degas the air, press it into a 6mm thick flat clay slab, and let it air dry naturally indoors for 48 hours. The moisture content of the clay body is controlled at 15% to obtain a semi-dry hard clay slab. 2) Carve along the strokes of the characters using carving tools. The groove depth is 1.0mm at the thick stroke position and 0.4mm at the end of the thin stroke position. The inner wall of the groove is smooth and without chipped edges. The groove depth changes synchronously with the thickness of the stroke, the beginning, the end, and the turning shape, forming an irregular groove that simulates the pauses and pausing characteristics of brush writing. 3) Apply glaze to the inside of the groove one by one using the filling method. The glaze filling height shall not exceed the edge of the groove opening, and the glaze shall not overflow and stain the surface of the body. Use spot glazing and dipping glazing methods to apply glaze locally, matching the amount of glaze according to the volume of the groove, so that the thickness of the glaze layer changes synchronously with the depth of the groove. 4) Spray a thin layer of transparent glaze on the surface of the body, let it dry, and then put it into the kiln. Heat it to 1280℃ and keep it at a constant temperature for 24 hours. Let it cool naturally before taking it out of the kiln. After firing, the glaze of the characters is raised evenly, the strokes are clear and distinct, the glaze is warm and transparent, and the body and glaze are tightly bonded. After firing, the characters rely on the glaze to accumulate in the grooves to form a raised glaze effect, which has both the texture of carving and the glossy texture of glaze.

[0021] Example 2 A process for making ceramic slabs with glazed clay for writing characters includes the following steps: 1) After kneading and degassing the clay, press it into 5mm clay slabs and air-dry it until the moisture content is 13%; 2) The depth of the carved grooves ranges from 0.3 to 1.0 mm, with deeper treatment at the turning points; the depth of the grooves varies with the thickness of the strokes and the beginning and ending points of the strokes, simulating the texture of brush writing. 3) Use a spot glazing machine to precisely apply glaze drop by drop, filling only the inside of the grooves; use spot glazing and dipping glazing methods to apply glaze to local areas of the grooves, controlling the glaze thickness to match the thickness of the strokes; 4) The firing temperature is 1300℃, and the glaze is melted and solidified at high temperature. The finished glaze surface is smooth and glossy with a strong three-dimensional effect. The glaze melts and solidifies in the groove to form three-dimensional glaze writing.

[0022] Example 3 A process for making ceramic slabs with glazed clay for writing characters includes the following steps: 1) Preparation of ceramic clay slab blanks: After kneading the ceramic clay to remove air, press it into a flat clay slab, let it air dry naturally until it is semi-dry, and polish the surface to make it smooth. 2) On the surface of the semi-dry clay slab, carve grooves to form characters according to the font and stroke direction. The depth of the grooves is controlled between 0.3 and 1.2 mm, and the depth varies with the thickness of the strokes and the beginning and end of the strokes to simulate the texture of brush writing. 3) Using dotting and dipping glazing methods, glaze is applied only inside the grooves of the characters, allowing the glaze to accumulate naturally within the grooves without overflowing the flat area of ​​the body. The thickness of the glaze layer matches the thickness of the strokes. 4) Apply a thin layer of transparent glaze to the whole body, let it air dry, and then fire it at high temperature in the kiln. The glaze melts and solidifies in the groove, forming three-dimensional writing characters with raised glaze, natural brushstrokes, and warm luster. After firing, the characters are formed by the glaze pooling in the groove, and the glaze is firmly bonded to the body, making it wear-resistant and not easy to fall off.

[0023] Example 4 A ceramic slab glaze writing technique includes the following steps: 1) Preparation of ceramic clay slab blanks: Knead the ceramic clay repeatedly to remove air bubbles and press it into a flat clay slab of uniform thickness; let the clay slab air dry naturally, control the moisture content to 12%-18%, form a semi-dry blank with moderate softness and hardness, and polish the surface of the blank until it is smooth and flat. 2) Pen-tip adapted groove carving: On the surface of the semi-dry clay slab, carving is carried out according to the stroke order and pen-tip trend of writing; the carving forms irregular character grooves, the groove depth is controlled between 0.3-1.2mm, the thick strokes and turning points are deepened, and the thin strokes and the starting and ending points are shallower, the shape of the groove completely conforms to the pause and pausing rules of brush writing. 3) Precise glazing in grooves: Using spot glazing and dipping glazing methods, the glaze is precisely applied to the inside of the grooves, and the glazing range is strictly controlled. The glaze only accumulates naturally inside the groove and does not spread to the outer surface of the body. The amount of glaze is matched according to the volume of the groove so that the thickness of the glaze layer changes synchronously with the depth of the groove. 4) High-temperature melting and solidification molding: According to the product decoration requirements, a thin layer of transparent protective glaze is selectively applied to the entire body; after natural air drying, it is fired in a kiln at a firing temperature of 1250-1320℃; the glaze melts and flows in a high-temperature environment, and the flow range is limited by the constraint of the side wall boundary of the groove. The glaze accumulates and thickens in the groove, and after cooling and solidification, it forms three-dimensional characters raised on the glaze surface.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ceramic slab glaze writing technique, characterized in that, Includes the following steps: 1) Preparation of ceramic clay slab blanks: After kneading and degassing the ceramic clay, press it into flat clay slabs and let it air dry naturally until it reaches a semi-dry blank state; 2) On the surface of the semi-dry clay slab, grooves are carved to form characters according to the stroke direction of the characters. The depth of the grooves varies with the thickness of the strokes and the beginning and ending strokes. The depth and width of the grooves change synchronously with the thickness of the strokes, the beginning, ending strokes, and the turning shape, forming irregular grooves that simulate the pauses and pausing characteristics of brush writing. 3) Apply glaze precisely only inside the grooves formed by the carving, so that the glaze accumulates in the grooves and does not spill onto the flat area of ​​the body; control the glaze to fill the grooves so that the glaze does not spill or stain the flat area of ​​the body. 4) A layer of transparent glaze can be applied to the entire body. After high-temperature firing, the glaze melts and solidifies in the groove to form three-dimensional glaze writing text. The glaze melts, accumulates and solidifies in the confined space of the groove. The glaze surface is raised by the limiting glaze accumulation effect of the groove, thus producing three-dimensional glaze writing text that combines the texture of carving and the glossy texture of glaze.

2. The ceramic slab writing process according to claim 1, characterized in that: In step 2), the engraving depth of the text groove is 0.3-1.2mm.

3. The ceramic slab writing process according to claim 1, characterized in that: In step 2), the depth of the text groove engraving is controlled to be 0.3-1.2mm. The groove depth is greater for thick strokes and smaller for thin strokes and the end of strokes. The groove depth is positively correlated with the thickness of the stroke.

4. The ceramic slab writing process according to claim 1, characterized in that: In step 3), the grooves are glazed locally using dotting and dipping methods, and the thickness of the glaze layer is controlled to match the thickness of the strokes.

5. The ceramic slab writing process according to claim 1, characterized in that: In step 3), a local glazing method of dotting and dipping is used, and the amount of glaze is matched according to the volume of the groove so that the thickness of the glaze layer changes synchronously with the depth of the groove.

6. The ceramic slab writing process according to claim 1, characterized in that: After firing, the characters rely on the glaze pooling in the grooves to create a raised glaze effect, combining the texture of carving with the glossy texture of glaze.

7. The ceramic slab writing process according to claim 1, characterized in that: Step 4) After firing, the glaze melts and expands and is constrained by the sidewalls of the groove. The text area forms a permanent glaze protrusion relative to the flat surface of the body. The height of the protrusion is determined by the depth of the groove and the coefficient of glaze melt expansion.

8. The ceramic slab writing process according to claim 1, characterized in that: The moisture content of the semi-dry blank is controlled at 12%-18%, and the softness and hardness of the blank are matched for carving to ensure that the edges of the groove are smooth and free of cracks.

9. The ceramic slab writing process according to claim 1, characterized in that: Step 4) The firing temperature is 1250-1320℃. Under high temperature, the glaze fully melts and flows and accumulates evenly in the groove, resulting in a dense and glossy glaze surface.