designs from leaves
The pursuit of designs from leaves.
Here one sees the result of a leaf wash containing both phosphorus and kaolin,
atop a stiff glaze.
These two leaf print designs utilize the same leaf wash and have similar
background (matrix) glazes.
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 0.15
Al2O3 0.63
SiO2 3.31
molecular percent Silica 62.5%
K2O 0.06
Al2O3 0.63
SiO2 3.01
molecular percent Silica 60.3%
K2O 0.004
Al2O3 0.4
SiO2 0.88
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 alkali metals and more MgO than the first.
The glaze layer below the leaf wash is thin,
but viscous. It neither bubbles through the leaf wash,
nor interacts
strongly with it.
Image of the plate with glaze alex_mashiko_Imerys_Z3I and leaf wash leaf_Z3I.
Image of the plate with glaze alex_mashiko_Imerys_Z3H and leaf wash leaf_Z3I.
oxidation firing to cone 10 in an electric kiln
Firing profiles
Up Fire profile
Down Fire Profile
Clay body is a crystal springs porcelain from Georgies in Portland.
glaze compositions
Empirical Formula alex_mashiko_Imerys_Z3I:
Na2O 0.33
CaO 0.45
MgO 0.07
Fe2O3 0.23
P2O5 0.13
Empirical Formula alex_mashiko_Imerys_Z3H:
Na2O 0.40
CaO 0.52
MgO 0.02
Fe2O3 0.25
P2O5 0.15
Empirical Formulae of leaf wash glaze leaf_Z3I:
Na2O 0.99
CaO 0.004
MgO 0.002
P2O5 0.33
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.