Introduction

Slab building is a popular method in pottery and ceramic art that involves creating flat, uniform pieces of clay, known as slabs, and using them to construct objects. This technique allows for a great deal of control, as it enables artists to create intricate shapes with smooth surfaces. In this article, we’ll walk you through the step-by-step process of slabbing clay, from preparing the clay to various methods you can use for construction.

Preparing the Clay

1. Choose your clay type: The first step in slabbing clay is to select the appropriate type of clay. Porcelain and most other clays are suitable for this technique; however, some artists prefer stoneware clays due to their durability and resistance to warping during the firing process.

2. Knead the clay: Before you begin slabbing, it is essential to knead the clay in order to remove air bubbles and ensure even consistency. This process can be done by hand or with wedging tools.

3. Flatten the clay slightly: After kneading the clay, flatten it into a rough disk shape using your hands or tools such as a rolling pin.

Creating Slabs

1. Rolling method: There are multiple ways to create slabs with different thicknesses; one common method is using a rolling pin. Place flattened clay on a clean work surface and begin rolling it out evenly until you reach the desired thickness. Consider placing two thin wooden guides at each side of the clay while rolling to achieve perfectly uniform thickness across your slab.

2. Slab roller method: Another way to create slabs is by using a slab roller machine that rolls out your work evenly through two rollers controlled by a press mechanism. This method offers greater control over evenness and thickness compared to manual rolling.

3. Cutting your slabs: Once your slab is at its desired thickness, use cutting tools like a fettling knife to cut out your desired shapes, such as squares or circles. Remember to smooth the edges of the slabs using a damp sponge to avoid any sharp edges.

Constructing with Slabs

1. Score and slip technique: To attach slabs together, use the score and slip method, which involves scoring (scratching) the edges of both slabs and applying a mixture of clay and water – known as slip. Press the scored surfaces together firmly, making sure they properly adhere.

2. Reinforce joints: To ensure that your slab construction is durable, reinforce the joints by adding coils or small strips of clay where the slabs connect. Smooth these into place using a damp finger or tool.

3. Smooth surfaces: For a polished final project, take time to smooth out the surfaces of your slab project with a rib tool, sponge, or other appropriate instruments.

4. Dry and fire: Allow your slab piece to air-dry completely before firing it in a kiln according to the specific clay type and glazing instructions.

In Conclusion

Slab building is an excellent technique for creating uniform structures while maintaining creative control over shapes and surfaces. By following these steps on how to slab clay, you’ll be well on your way to mastering this craft. As you become more experienced, don’t be afraid to experiment with different forms, sizes, and styles – the possibilities are truly endless in this flexible method of ceramic art creation!