Tuesday, March 21, 2006

Raku Teabowl

This teabowl has beautiful copper red flashings all around the outside of the bowl. The inside was glazed with a Clear Crackle Glaze. The outside was first glazed with the Clear Crackle and then glazed again with a Turquoise Crackle.

I think the clear glaze I use is Called Soldner's Clear Crackle. 80% Gerstley Borate, 20% Neph. Sy.

For the Turquoise Crackle glaze I just added 10% Zircopax and 2% Copper Carbonate to the Soldner's Clear.

Sunday, March 12, 2006

Raku Tea Bowl

Ferguson's Turquoise Crackle Glaze. Fired in heavy reduction during the last 10 minutes of firing. The turquoise has a nice soft crackle appearance and the copper red metallics are hard, brilliant, and shiny. As with most my tea bowls, the dimensions are approximately
3-3/4 inches tall by 4-3/4 inches wide.

Raku Tea Bowl

Turquoise Raku.
After about a dozen firings I am finally learning how to fire my new kiln and am very happy with the results I am getting. This turquoise glaze has become one of my favorites because it can produce a lot of different colors, depending on how the kiln is fired. Under normal firing conditions this glaze will always come out a blue turquoise. When the kiln is heavily reduced near the end of the firing the glaze will yield a crackled turquoise with multicolored metalic flashes. When the kiln is fired in heavy reduction throughout the firing process the glaze will be a shiny metalic copper, so shiny you can see your reflection in the glaze. I have also had this same glaze turn out the most beautiful oxblood red I have ever seen. Although, I have only been able to get that red once. But, I'm still trying.