Craft · 6 pages · 12 min
Why wedging clay removes air
Kneading shears the lump so air pockets leave and the moisture becomes even.
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From the opening
Wedging is a repeated kneading that shears the clay so trapped air is driven out and the moisture is spread through the mass. A wire cut through the lump should show an even face, without holes and without wet streaks beside dry ones. The opening covers shearing drives air pockets out, a wire cut shows the inside, and wetter and drier parts get mixed.
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Inside
- Shearing drives air pockets out
- A wire cut shows the inside
- Wetter and drier parts get mixed
- A void can blister in the kiln
- Where the idea stops applying
- A distinction worth keeping
Sources
- Wedging to remove air from clay
- Steam blisters from moisture trapped in clay