It s ok to leave the balloon inside.
How to make a ceramic sphere.
If your sphere is larger than 2 or 2 5 inches in diameter you will need to hollow out the insides with a small scoop.
Once the ball shape is formed use the pin tool to pierce the clay and pop the balloon inside.
If the clay is only 2 or 2 5 inches in diameter insert a needle tool into the sphere and insert it at least half way into the sphere so that the sphere is broken up in the center and no part of the sphere is more than 1 5 inches.
Ceramic mold making techniques.
Remember you must pierce a hole in the sphere to allow air to escape.
While the clay is still leather hard i paddle the sphere with the balloon inside to strengthen joints or to alter shape and create additional texture.
It will just burn out in the kiln or if you decide to poke holes in the sphere as part of the design you may be able to gently remove it through a hole in the clay.
Jun 1 2020 explore christy johnson s board clay spheres followed by 999 people on pinterest.
If one has not been left in the forming process an opening big enough to insert a hand is carved out at this point.