So, Ive been playing with a few 'lava' style glaze recipes to obtain a similar effect to this:
Using silicon carbide yields some wonderful bubbling and crawling but the color is pretty much dark grey or darker at cone 5/6.
silicon carbide 10
calc. carbonate (whiting) 25
silica (quartz) 12.5
silicon carbide 12.5
Now something I read, is barium sulfate can be a substitute for silicon carbide here. Which sounds great to me because its cheaper and lighter colored, and I want to get as close to white as possible with the glaze. However, nothing I do with barium sulfite in the above recipes has the same effect, all I end up with are these weird peeling crawls that look very little like lava and very much like scar tissue. Interesting maybe but not really the direction I wanna go.
So Im wondering if anyone here has actually use barium sulfate specifically for a good lava glaze effect? Thanks!