leaf
Continuing the pursuit for a leaf print showing most of the veins, along with
interesting colors.
In that leaf print, the watered-down glazes used as leaf wash were half
rutile, as I had concluded that
However, I decided that the monochrome colors of that print were the result of
rutile's dominance in the glazes.
For the current print, the two glazes used as leaf wash both contained 30% rutile,
approximately half
I was rewarded with a more interesting palette of colors. The veins, while
visible, are not complete,
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 1750 deg F then a half hour hold at 1750 deg F
300 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 0.1
Al2O3 0.59
SiO2 3.13
molecular percent Silica 63%
K2O 0.34
Al2O3 1.06
SiO2 6.4
molecular percent Silica 54.3%
K2O 0.30
Al2O3 0.62
SiO2 2.89
molecular percent Silica 45%
A leaf is softened by soaking in water laced with water softener. After
the pot is glazed, the leaf is pressed
With the stem at the bottom, from left to right the thinned glazes leaf_Z36,
and mica_matte_Z34_Leaf
Although the two leaf washes differ substantially in composition, the two
sides of the leaf
The goal is a colorful print with sharply defined veins. It remains to keep
the colors of this print,
Texture, and a rather complete view of
the veins were seen
here.
rutile was key. The result did not
dissuade me from my infatuation with rutile.
way between the two preceding
attempts.
and show significant line broadening. They are not
as sharp as I'd like.
Image of the plate with glaze satIron_ZG_0 and leaf.
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 :
Na2O 0.49
Li2O 0.19
CaO 0.16
MgO 0.06
Fe2O3 0.2
P2O5 0.04
Empirical Formulae of leaf wash glaze leaf_Z36:
Na2O 0.15
CaO 0.49
MgO 0.02
Fe2O3 0.02
TiO2 3.3
Empirical Formulae of leaf wash glaze mica_matte_Z34_Leaf :
Na2O 0.07
CaO 0.37
MgO 0.02
SrO 0.24
Fe2O3 0.02
TiO2 1.89
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 two
underfired glazes: leaf_Z36 and
mica_matte_Z34_Leaf.
were applied respectively to a sector
approximating half of the leaf.
are nearly identical in appearance. That observation
makes it difficult to explicate which aspect of the
leaf wash was responsible
for the lovely colors seen in this plate.
while increasing the visibility of the veins.