Leaves on Saturated Iron Glaze
cone 10 oxidation
Firing profile
A two hour hold at 1850 deg F
A half hour hold at 1750 deg F
A three hour hold at 1700 deg F
slow downfire at 25 deg F an hour in the interval 1700 deg F to 1650 deg F
A half hour hold at 1650 deg F
Clay body is a grolleg porcelain from Tacoma Clay Art Center.
glaze composition
In the empirical formula:
Both glazes have alkali metals ~.77
Li2O is .3 in the first glaze, .2 in
the second glaze.
The remaining bases are divided between calcia and Magnesia,
with more calcia
alumina is .5 in the first glaze, .6 in the second.
silica:Alumina ratio is respectively 1.5 and 1.3
The leaf print in the first glaze is intact, showing the veins and shape of
the original leaf.
The second glaze flowed through the
print, leaving in its wake an abstract artifact from which even the shape of
the leaf is gone.
The first glaze has higher alumina, lower silica
alumina ratio and less lithia.
It is a stiffer glaze, than the second.
The pots are pasta bowls ~12 inches in diameter.
glaze satIron_ZG_0
glaze satIron_ZG_H_0