designs from leaves
The pursuit of designs from leaves.
Here one sees the result of a stiff second glaze layer atop a late maturing
matrix glaze.
These two leaf print designs utilize the same leaf wash and have similar
background (matrix) glazes.
The extreme bubbling of the glaze on the first plate is the result of
overgenerous glaze application.
plate is ~ 8 inches in diameter.
plate is ~ 8 inches in diameter.
150 deg F an hour to 250 deg F
400 deg F an hour to 1800 deg F
300 deg F an hour to 2050 deg F
120 deg F an hour to 2310 deg F with a hold of 20 minutes at 2310 deg F
300 deg F an hour to 1800 deg F then a 2 hr hold at 1800 deg F
300 deg F an hour to 1750 deg F then a 1 hr hold at 1750 deg F
50 deg F an hour to 1700 deg F then a three hour hold at 1700 deg F
25 deg F an hour to 1650 deg F then a one hour hold at 1650 deg F
K2O 0.09
Al2O3 0.58
SiO2 4.2
molecular percent Silica 70.3%
K2O 0.09
Al2O3 0.58
SiO2 4.1
molecular percent Silica 69.3%
Na2O 0.55
Al2O3 0.45
SiO2 3.59
molecular percent Silica 41.43%
A leaf is softened by soaking in water laced with water softener. After
the pot is glazed, the leaf is pressed
The second glaze has more iron than the first.
Both prints are the result of bubbling of the
matrix glaze through the leaf print wash. They have interesting colors
and are leaf-shaped, but it is not necessarily obvious that these were derived
from actual leaves.
Image of the plate with glaze iron_Alex_0PPSi_MMgFe and leaf wash leaf_Z3C.
Image of the plate with glaze iron_Alex_0PPSi_MMg and leaf wash leaf_Z3C.
oxidation firing to cone 10 in an electric kiln
Firing profiles
Up Fire profile
Down Fire Profile
Clay body is a grolegg porcelain from Clayart Center in Tacoma, WA.
glaze compositions
Empirical Formula iron_Alex_0PPSi_MMgFe :
Na2O 0.45
Li2O 0.17
CaO 0.27
MgO 0.02
Fe2O3 0.11
P2O5 0.07
Empirical Formula iron_Alex_0PPSi_MMg :
Na2O 0.45
Li2O 0.17
CaO 0.27
MgO 0.02
Fe2O3 0.16
P2O5 0.07
Empirical Formulae of leaf wash glaze leaf_Z3C:
Li2O 0.45
P2O5 0.19
TiO2 3.44
into the glaze. When the glaze
dries, a swatch of plate including the leaf is coated with wax. When the wax
is dry, the leaf is removed and the indentations in the glaze are coated
with a very thin layer of an
underfired glaze.