One Mound, Many Pieces
Throwing off the hump is a technique where you centre a large mound of clay and throw multiple small pieces one after another without removing the hump from the wheel. Each piece is thrown from the top of the mound, cut off with a wire tool, and set aside, then you re-centre the remaining clay and start the next piece.
Why Potters Use This Method
This approach is highly efficient for production pottery: making sets of matching cups, small bowls, or lids. Instead of individually weigh-and-wedge-and-centre each piece, you centre once and throw many.
- Faster production: No re-centering between each piece.
- Consistent sizing: Once you develop rhythm, your pieces naturally come out similar in size.
- Less fatigue: Centering one large mound takes less cumulative effort than centering many small ones.
What You Need
- A firm, well-wedged hump of clay: 2 to 4 kg is a good starting range.
- The hump should be cone-shaped: a smooth dome, not a flat pancake.
- You will need a wire tool to cut each piece off cleanly.
- A bat or board nearby to set finished pieces on without distorting them.
The most important foundation skill for this technique is solid centering. If the hump wobbles, the whole session wobbles with it.
Did You Know?
Throwing off the hump has deep roots in production pottery traditions, particularly in the mingei folk craft movement of Japan, where potters like Shoji Hamada used efficient repetition to produce large quantities of functional ware. The technique is especially well suited to making small stoneware forms like tea bowls and sake cups.
Common Mistakes and Quick Fixes
- Starting with a soft, under-wedged hump: Use firm, fully wedged clay for stability.
- Skipping hump re-centering between pieces: Re-true the top each cycle for consistent forms.
- No staging board nearby: Prepare transfer surfaces before throwing starts.
- Expecting exact match without rhythm: Focus on consistent hand sequence and timing.
Practice Exercise
Throw a set of six small cups off one hump and measure height and rim diameter after trimming. Repeat weekly and compare variation. This gives objective progress toward production consistency.
