1. Raw Material Preparation (Clay Mixing)The process begins with selecting and blending natural clays. This step, called 配土 (pei tu), ensures the right composition and consistency for shaping and firing.
2. Slurry Forming (Ball Milling)
The clay is mixed with water to form a fine slurry. This stage is crucial for achieving the uniform texture needed for high-end bathroom basins.
3. High-Pressure Molding
Unlike traditional hand-molding, modern factories use high-pressure casting techniques to create precise and durable shapes. This method helps reduce defects and ensures consistency across large batches.
4. Mold Handling & Demolding
After casting, molds are carefully opened (开模), and the freshly formed pieces are removed (脱模) with precision. At this point, the basin is still extremely fragile.
5. Shaping & Drying
Holes are drilled (开孔) for fixtures and drains. The basin is left to air-dry naturally (自然风干) before entering a controlled drying room (暖房烘干), which reduces internal stress and prevents cracks.
6. Trimming and Surface Finishing
Both wet and dry trimming (修湿胚 & 修干胚) are performed by skilled workers to refine the shape and edges. Any imperfections are corrected at this stage.
7. Glazing (喷釉)
A smooth, protective glaze is sprayed on after careful surface preparation (查油, 清理釉渣, 吹掉灰尘). This step enhances both aesthetics and waterproofing.
8. Kiln Firing (烧制)
The glazed basins are loaded into kilns (装窑, 入窑) and fired at temperatures exceeding 1200°C. This high-temperature firing process vitrifies the ceramic, making it strong, dense, and highly durable.
9. Unloading & Quality Inspection
Once cooled (出窑), each basin is thoroughly inspected for defects. Only those that meet strict quality standards move on to packaging and distribution.