In my kiln, this firing is set to Program #5. The kiln castings after the glass has been taken out of the mold and cleaned up a bit. Each "brick" is between 1/2" to 1" thick. Slicing the cast "bricks" with a table top tile saw.
(My least favorite part of the process. So loud and messy!)But it's worth it! The colors and patterns of the glass castings are revealed after they are sliced open. They've always reminded me of geodes. Once I have the slices, they 're cut down to size with a hand held glass cutter/scoring tool. The windows are also coated with the same primer/kiln wash that is on the shelves. This allows the glass to slump through the clay opening with minimal stress and cracking on the glass.
This is Glass Firing Program #2 .