So I added more glass tessarae and I painted the bowl with a blue Botz glaze.
The kiln was fired at 1050 C with an hour’s soak. The clay has now turned proper black…I didn’t glaze the outside of the bowl, it is still matte and rough to the touch. I think it gives a nice contrast to the shiny and smooth inside.
…and there is a proper little lake at the bottom of the bowl, as intended. But. I wonder.
The search for perfection may carry on for a little while, yet. The glass still looks lumpy.
I’m sorry about the quality of the photos; it is quite a dark day so I had to use a flash.