Wedging helps to spread moisture evenly throughout the clay which helps with easier centering on the wheel. The spiral wedging technique is handy when you have to wedge or knead large clay batches.
What are the three wedging techniques in ceramics?
There are a few different ways to wedge clay. Kneading- essential to even out the clay body and remove air bubbles which can cause bloating or explosions during firing. Spiral Kneading- useful for larger amounts of clay, a cut through the clay mass will show a developing spiral.
Why are bubbles in clay bad?
Air bubbles in clay items are dangerous because they can cause explosions in the kiln. The air bubble dilates due to heat and forces the clay to crack or explode and shatter the ceramic piece. The risk of explosion increases with the temperature in the kiln.
What is a wedge in ceramics?
Wedging clay definition: the process of kneading the clay with the hands to remove air bubbles and ensure a homogenous mass.
How much clay do I need to make a spiral wedge?
Taking 3 pounds (1.4 kg) of clay and mixing half with Evergreen Mason Stain, see how many Spiral wedges it will take to blend the two colors together. The Spiral Wedge took a little less than 4 minutes and only 100 wedges to blend the two colors together.
What is wedging on the pottery wheel?
Also called Coning or Towering, is wedging on the pottery wheel. With both, your hands bring the clay up to a tall tower shape. Place your anchor hand on the side of the clay, use the other hand to push the top of the tower down on an angle and away from you. Continue to push the clay down. Forming the clay into a beehive shape.
Does wedging clay make it more malleable?
Well wedged clay will get rid of any large or small lumps that may be lurking in your clay and will make your clay more malleable (workable). Makes the Clay More Plastic Plastic is the flexibility of the clay. Wedging helps the clay particles or platelets align with each other making the clay easier to mold.
What is the best way to make swirl patterns in clay?
The Spiral or Shell Wedging is another method you may want to try. It’s a little trickier but still easy to learn. This method is similar to the Ram’s Head in the way they both create a swirl pattern. The Spiral mixes the clay very well, by removing any lumps, making the clay more workable and also eliminates air bubbles effectively.
