Compressing clay slabs involves smoothing and compacting the clay particles, typically using a rib or similar tool, to improve its strength and prevent cracking. This is accomplished by applying pressure and moving the tool in a consistent direction, aligning the clay particles.
Here's a breakdown:
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Using a Rib: The reference indicates using a rib (a smooth, often kidney-shaped tool) to compress the clay. The crucial technique is to move the rib in the same direction, aligning the clay particles. This helps to prevent cracks during drying and firing.
- Direction Matters: Consistency in direction is key. Avoid random movements as this can disrupt the clay's structure.
- Pressure: Apply firm, even pressure as you move the rib across the surface. This helps to compact the clay and remove air pockets.
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Why Compression is Important: Compressing the clay slab is crucial for several reasons:
- Reduces Cracking: Aligned clay particles are less likely to separate, reducing the risk of cracking during drying and firing.
- Increases Strength: Compressing makes the clay slab stronger and more durable.
- Improves Workability: A well-compressed slab is easier to work with and shape.
