Throwing
bowls is the focus of this beginner's guide. In this tutorial, I'll demonstrate
two different methods for creating pottery bowls while discussing various
important aspects, such as forming the interior curve and distributing the clay
to trim a nice, tall foot ring.
Demonstrating Two Different Methods
I'll
begin by throwing two bowls using slightly different methods, each starting
with approximately one pound of clay (about 454 grams).
1: First Method
1. Centering and Opening the Clay: After centering and opening up the
lump of clay, immediately begin pulling the walls up and outward in the
same movement.
2. Forming
the Walls:
With
each pull, dig your knuckle firmly into the base, pressing that portion
inward. This action pushes some clay up into the base portion of the
wall.
Pull
this clay up into the curved sides carefully to avoid constricting the
bottom too much. Insufficient clay beneath the walls can cause them to
slump.
3. Shaping the Bowl: Throwing directly to the throwing
gauge's pointer upward and outward is the most direct method of making
bowls. Remember, there's no single best way—it's about finding what works
best for you and what you enjoy.
4. Finishing the First Bowl: Once the rim is set, the pot is wired
through, and the bowl is gently lifted away, the first piece is finished.
2: Second Method
1. Centering and Opening the Clay: Start by centering and opening up
the clay as before.
2. Creating
a Rough Cylinder:
Pull
the walls upward into a rough cylinder, allowing a slight outward angle.
Ensure
the cylinder remains relatively thick from top to bottom, especially at
the rim. If the rim is too thin, the next steps won't be possible.
3. Stretching into a Bowl Shape:
Once
the cylinder is tall enough, gradually stretch the walls outward bit by
bit into the bowl shape similar to the first method.
Be
cautious if starting with a very thin rim, as stretching can cause it to
split, especially with weaker or recycled clay.
4. Finishing the Second Bowl: The finishing steps are identical to
the first method:
Undercut the
bottom.
Clean the
inside.
Smooth the rim.
Drag a wire
underneath.
Lift
the bowl away with fingers stuffed into the excess clay around the base
and press off.
3: Comparing the Two Methods
To
highlight the differences:
First Method: Pulls the walls directly upward and outward to form the
bowl.
Second Method: Forms a cylinder first, then stretches it into a bowl
shape.
When
making bowls, decide which method suits your style and comfort. Having a clear
plan can significantly aid your throwing process.
4: Centering the Clay
1. Shaping
the Centered Clay:
Aim
for a low disc form that's slightly wider than it is tall. This extra
width provides the necessary clay beneath the walls for support.
Cone
the clay up and down several times to center it effectively.
Roughly
flatten the top to achieve the desired shape.
2. Opening
Up the Clay:
Use
a wetted thumb and index finger to open up and check the depth.
Push
down into the middle carefully, leaving about 1.5 cm (2/3 of an inch) in
the base.
Verify
the depth by gently pushing a needle through the bottom and feeling the
base thickness.
3. Marking
the Foot Ring:
From
a cross-section view, distribute the clay appropriately, leaving enough
material in the base for the foot ring.
Mark
out where the foot ring will sit underneath the pot using a needle.
4. Forming
the Interior Curve:
Aim
for a continuous, curved interior by opening up in a V-shape rather than
creating a flat base.
Practice
pinching and drawing up large amounts of clay to form the initial pulls.
5: How to Pull the Walls Up
1. Using
Your Fingers:
Push
in at the base with your index finger on the outside while drawing the
clay up with your hands.
Let
the wheel's inertia help pull the form outward gently.
2. Maintaining
Consistent Movement:
Ensure
both inside and outside fingers work in harmony to pull the walls up and
out at a gradual pace.
Release
the rim gently once your fingers reach it.
3. Managing
Moisture:
Add
a moderate amount of water to the inside to prevent sticking, but avoid
over-watering, which can weaken the clay.
4. Achieving
Desired Dimensions:
Aim
for specific measurements, such as 18 cm wide and 7 cm tall for the bowl.
Make
one or two additional pulls to enhance the curve.
6: How to Clean Up the Bowl
1. Undercutting
the Form:
Undercut
the base first to prevent bumps from forming inside the bowl.
This
ensures a smooth interior without deforming the already cleaned sections.
2. Scraping
the Interior:
Scrape
clean the interior to create a continuous curve.
Remove
excess slip to maintain the shape integrity.
3. Performing
the Roll Test:
Roll
a ball along the interior curve. It should rock smoothly without
irregular stops, indicating a well-formed curve.
7: Lifting the Bowl from the Wheel
1. Using Excess Clay for Grip:
The
excess clay on either side of the foot ring provides grip points.
Insert
four fingers horizontally into the excess clay to lift the pot securely.
2. Avoiding
Unwanted Contact:
Ensure
only the designated points contact the bowl to maintain its shape.
3. Using a Twisted Metal Wire:
Employ
a twisted metal wire to create a distinct cut underneath the pot,
reducing the chance of sticking.
Spin
the wheel while lifting to break any sticky seal.
8: The Tools I Use
Most of
the work is done by hand, but these five simple tools assist in the process:
Blunted Turning Tool: Used to undercut the base, creating
a dry area for lifting the pot.
Sponge:
Mops out excess water and slip.
Sharp Metal Scraper: Cleans the surface of the bowl.
Shammy Leather: Compresses the rim for a smooth finish.
Twisted Metal Wire: Cuts underneath the pot to release
it from the wheel.
Source
The lesson is based on material from the YouTube video by Gadsby, F. For
more information and analysis, the book by Gadsby, F. (2023), By My Hands, Penguin Books, is recommended.