"That could work. I considered it before but dismissed it because seeing as metal and glass have different conductivity of heat, the glass would crack when they expand and contract due to heat. If we could solve that problem, it will work. But as of now we can't do that." The young lady tapped her lips, eyeing the sea of parchment rolls. "You could experiment over there, though I don't expect you to find anything I did not. You'll end up having more fun playing with fire than actually working with the materials in the end." She pointed him to a table which surface was charred black from a heat torch directed from the steel-enclosed furnace. Without a break in her movement, she switched back to her work.