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Wood fired porcelain vase with glazed interior and partially glazed exterior. 11 1/4" high.

 

About the wood firing:

The wood firing workshop took place March 5-7 under the instruction of Mark Tyson. It is a newly constructed train kiln that has only been fired less than five times total. The first day is spent prepping the pots: cleaning, glazing, and wadding each piece, then loaded into the kiln.

Each stack, or arrangement of the wares and kiln shelves, are one of the factors that dictate the results. Wares in the flame path will be hit with more wood ash and direct heat, and many times the direction of the flame's energy is indicated by the orange flashing flowing against the wadding (the blank white spots left on the bottom of the piece). Other pieces that are more protected will have less direct ash deposits, but still achieve beautiful affects from atmospheric gases. 

Wood ash is a flux composed mainly of calcium oxide, potassium oxide, magnesium oxide, sodium oxide, and some silicon and phosphorous. When these oxides melt under high heat of around 2345 degrees F, they attach onto the sticky surface of the glowing hot pots and become a glaze. In reduction we use plenty of wood so that carbon can be exchanged from wood rather than from the clay bodies.

These oxides sourced from the ash, combined with the metall