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I have a very deep ceramic mask mold. I have fired this mask twice. The first time I didn't quite know what to look for when I peeked into the kiln, so I know I didn't leave it in long enough. I took it to 1175 for 30 min. I fired it a second time, took it to 1250 for two hours, it still hadn't fill...

I have a mask that I slumped that didn't get completely finished. Can I put it back in and redo it and if so at what temperature.
Marla

I have a new mask mold. I thought I'd use the spray instead of kiln wash due to the tiny places. It is a pretty deep mold. Do I cut the glass slightly larger that the edge of the mold? Anybody have any pointers?