|Monthly Tech-Tip |
The mug on the left was in a hotter part of the kiln (gas reduction), it's surface is brilliant glassy smooth and metallic. The one on the right is dull, pebbly, much less interesting. The temperature difference is about one cone. This is not enough to make much difference in the transparent glaze, but the tenmoku is sensitive, it needs to reach the full temperature.
Tenmoku is a kind of high temperature reduction firing ceramic glaze. Glossy, very dark brown or maroon, fluxed by iron oxide to have high melt fluidity.