1. Trim the rim

Using the potter’s needle, trim the rim at an angle of approximately 90 degrees to the wall.

2. Prepare the rim for joining

Using water and a firm toothbrush, create a thin layer of slip and texture on the trimmed face and down 15 mm from the top on both the inner and outer surface of the pot. Use only as much water as necessary to create the slip. Do not overwet the clay.

3. Add the new coil

Add the new coil, overlapping the crossover. A small amount of slip can be generated at the crossover to assist the join. Do not overwet the clay.

4. Join the coil

Work the new coil into the wall with the thumb and finger as you would a coil pot.

5. smooth the coil

While the wheel is rotating, smooth the joint with the tips of the fingers. Do not wet the clay.

6. Thin the wall using the Throwmaster

Beginning at the top, thin the wall in three or four ‘bites’. Then, with the Throwmaster in the closed position start a pull from below the joint, thinning the entire coil to the set 6mm.

Try to keep the wall as upright as possible by ensuring the Throwmaster is travelling vertically when using it.

7. stiffen the wall

Using a blowtorch or heat gun, apply heat to the wall focussing on the join and away from the rim. This renders the wall stronger under the join and with fresh clay at the rim. Do not over-dry. 

8. align and shape the wall

Using wooden kidneys, gently smooth and align the wall in the direction required.

9. Repeat