leopard spot leaves
leaves with leopard spots
The desire for a more subtle result, Trisodium Phosphate as leaf softener.
These two leaf print designs utilize the same leaf wash, containing mostly
phosphorus and a teensy bit of Mica.
The leaf wash contains phosphorus. The leaf itself is first softened in water,
in which I'd previously been
These two glazes have similar composition, though the first is slightly
stiffer, having higher alumina,
The dark smudges on the first leaf are the result of wetting the leaf print in
the application of the leaf wash,
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 1900 deg F then a 2 hour hold at 1900 deg F
300 deg F an hour to 1750 deg F then a 1 hour hold at 1750 deg F
300 deg F an hour to 1700 deg F then a 3 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 0.14
Al2O3 0.67
SiO2 3.16
molecular percent Silica 61.5%
K2O 0.12
Al2O3 0.64
SiO2 3.23
molecular percent Silica 62.2%
K2O 0.43
Al2O3 0.54
SiO2 3.33
molecular percent Silica 48%
A leaf is softened by soaking in water laced with trisodium phosphate. After
the pot is glazed, the leaf is pressed
using water softener. I decided to use trisodium
phosphate, which indeed softens equally, and provides additional color.
lower silica, resulting in a lower
silica:alumina ratio.
thus allowing the lines to soften.
Image of the plate with glaze satIron_ZG_0_PK_Z3L and leaf wash leaf_Z3K.
Image of the plate with glaze satIron_ZG_0_PK_MLi and leaf wash leaf_Z3K.
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 satIron_ZG_0_PK_Z3L:
Na2O 0.66
CaO 0.18
MgO 0.02
Fe2O3 0.21
P2O5 0.10
Empirical Formula satIron_ZG_0_PK_MLi :
Na2O 0.69
CaO 0.18
MgO 0.01
Fe2O3 0.22
P2O5 0.1
Empirical Formulae of leaf wash glaze leaf_Z3K:
Na2O 0.53
CaO 0.04
P2O5 0.15
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.