Technical Information No. M230 Clay
Type of Clay:
Porcelain Suitable for Large item production by Potters Wheel or plaster castion , hand made. Good plasticity clay suitable to produce large items.
Fired Color:
White by reduction / Ivory by oxidation
Firing Temperature:
1200°C SK6a (oxidation) to 1280°C SK8 (reduction)
Forming Methods:
- Roller Machine
- Hand Forming
- Plaster Casting
Shrinkage:
10 percent to 12 percent dry to fired at 1280 degreeｓ Ｃ..
Small shrinkage offer less cracking and prevent deformation.
Plasticity:
Higher plasticity, suitable for large plate, wide pot, tall pot
Examples of Ceramic Products:
- Tableware: 10-inch plates
- Pots: Up to 16 inch height or width
- water absorption zero percrnt at 1240 degrees fire.
- suitable for table ware, flower pot
Clay Production Process to Ensure Quality:
| ACTION | HOBBY CLAY | CLAY PRODUCTION FACTORY |
|---|---|---|
| BALL MILL | GRIND RAW MATERIALS IN A BALL MILL FOR 20 HOURS. PARTICLE SIZE 8 MICRONS AVERAGE | USE BALL MILL |
| ELECTRIC MAGNET REMOVE IRON SPOT | IRON OXIDE, RUST ARE REMOVED | USE ELECTRIC MAGNET |
| SIEVE 180 MESH TO REMOE LARGE PARTICLE | YES SIEVED BY 180 MESH ELECTRICAL SIEVE.. CLAY PASS 180 MESH SCREEN | USE SCREEN |
| DE-AIR EXTRUDER PUG MILL | CLAY IS KNEADED IN STAILESS PUG MILL WITH VACUUM AIR POMP. NO AIR IN THE CLAY | USE VACUUM EXTRUDER |
| PUG MILLED VACUUM PUMP |  |
Chemical Analysis:
| Chemical Name | Percentage |
|---|---|
| SiO₂ | 68.2% |
| Al₂O₃ | 19.9% |
| Fe₂O₃ | 0.41% |
| TiO₂ | 0.26% |
| CaO | 0.51% |
| MgO | 0.07% |
| K₂O | 4.13% |
| Na₂O | 1.38% |
| Ignition Loss | 5.16% |
| Total | 99.92% |
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