The three classic methods
Hand-building generally splits into three approaches. Many finished pieces combine them, so it is worth understanding each one before deciding what to make.
- Pinch: pressing a thumb into a ball of clay and squeezing the walls outward. Best for small bowls and cups.
- Coil: rolling ropes of clay and stacking them, then smoothing the joins. Used for taller vessels.
- Slab: rolling clay into flat sheets and joining them like panels. Suited to boxes, trays, and angular forms.
Starting with a pinch pot
Begin with a ball of clay roughly the size of an orange. Press your thumb into the centre, stopping before you reach the bottom, then rotate the ball while pinching the wall between thumb and fingers. Work in small steps and turn often so the wall stays an even thickness. A wall around the thickness of a finger is a forgiving starting point.
Why even walls matter
Clay shrinks as it dries and again when it is fired. If one part of a wall is much thicker than another, the two areas shrink at different rates, which is a frequent cause of cracks. Consistent thickness is more important than a perfect shape.
Coil construction
Roll ropes of clay on a flat surface using flat hands, working from the centre outward. Build the wall by laying coils on top of one another. The step beginners skip is joining: scratch both surfaces that will meet (often called scoring), add a little water or slip, and press them together. Skipped joins tend to open up later in drying or firing.
Slab work
Roll clay to an even thickness between two wooden guide sticks so the sheet is consistent. Let slabs firm up slightly to leather-hard before assembling, which keeps walls from slumping. Score and slip every seam, just as with coils.
Joining, drying, and the leather-hard stage
Clay passes through predictable stages as it dries. Knowing the names helps when following any class or reference.
- Plastic (soft)
- Freshly opened clay. Easy to shape but slumps under its own weight if walls are thin.
- Leather-hard
- Firm enough to hold a shape and be trimmed or carved, but still cool and slightly damp. The best stage for joining and adding handles.
- Bone-dry
- Fully dried, pale, and at room temperature. Fragile, and ready for the first firing.
Drying in a Canadian winter
Forced-air heating in winter can dry surfaces much faster than the inside of a thick wall, which causes uneven shrinkage. Drying work slowly under loose plastic, away from heat vents, gives more even results. There is no single correct drying time; thicker and larger pieces simply need longer.
A short list of useful tools
- A wooden or metal rib for smoothing surfaces.
- A needle tool for scoring and trimming edges.
- A simple wire for cutting clay off the block.
- A damp sponge for controlling moisture as you work.
None of these are expensive, and many beginners improvise with a butter knife and an old credit card before buying a set.
For a general overview of forming methods and terminology, the public reference page on pottery is a reasonable starting point. Once your pieces are bone-dry, the next steps are firing and glazing.