I'm attempting to transition from fully thrown plates to partially slab constructed to save time and effort. The first iteration of the plates are simple with a flat bottom, no foot, and a short turned up (nearly vertical) side about 3/4-1".
The problem I have is that after the glaze fire the center of the plate has risen up and there's a hump that goes nearly from edge to edge. Before the glaze firing, the greenware and bisqueware plates are flat and look fine.
My process:
Roll the slabs out to about 3/8" thickness
Cut into rough circles by hand
Toss on the wheel andĀ flatten down on a bat
Cut to a perfect circle
While on the wheel, turn the edge up with a wooden tool and my hand
Once it's dry, remove from bat and cleanup any edges with a sponge. Bisque fire flat on kiln shelves, glaze and high fire the same way.
slab plates center warping during glaze fire
in Studio Operations and Making Work
Posted
I'm attempting to transition from fully thrown plates to partially slab constructed to save time and effort. The first iteration of the plates are simple with a flat bottom, no foot, and a short turned up (nearly vertical) side about 3/4-1".
The problem I have is that after the glaze fire the center of the plate has risen up and there's a hump that goes nearly from edge to edge. Before the glaze firing, the greenware and bisqueware plates are flat and look fine.
My process:
Once it's dry, remove from bat and cleanup any edges with a sponge. Bisque fire flat on kiln shelves, glaze and high fire the same way.