Today we (students Ceramics and Glass) went to the atelier of Rudie Delanghe. Rudie is specialised in throwing pots and also controlling the "cracks" in the glaze.
2) This is a gas fired kiln.
This kiln is used when you require a reduction environment as in raku firing.
All of us could fire three pieces made by ourselfs. I fired two vases and one bowl.We learned that we did Raku on a western way, different from the Japanese.
3) Old barrel filled with sawdust.
The pieces are removed from the hot kiln and placed in masses of sawdust to provide a reducing atmosphere for the glaze. The sawdust will fire. We used specially formulated glaze recipe that "crackle" or craze (present a cracked appearance), because the crazing lines take on a dark color from the carbon.
The glaze firing times for raku ware are short, we waited maybe just 1 hour to get the temperature of 1060 degrees.