Today I slumped the mauve opal glass into a bowl. This glass I had previously slumped into a bowl, but it came out with uneven edges. So, I put the bowl on my kiln shelf the other day and fired the kiln up until the glass was flat again. It was not perfectly round, so I had to grind the edges until I had a nice round piece of glass again.
The glass bowl is still cooling off in the kiln, but I think the edges are uneven again, or at least lopsided. It was hard to tell.
I am getting the feeling that this bowl mold is for an expert slumper. I downloaded some information to help me slump this glass in a mold with steep sides. Perhaps I just need to practice till it comes out right.
It is a very interesting bowl. We have also thought about turning the mold upside down and putting a piece of glass on top. This is called draping. I think I will try this next time.