leaf
Continuing the saga of the quest for a leaf print. Some indications of the
texture, and some visible leaf veins were seen
here.
Next, four different watered-down glazes are used as leaf wash. In the
result shown here, the veins
plate is ~ 8 inches in diameter, the two thinned glazes used as leaf wash are,
left to right, leaf_Z35_2 and leaf_Z35_1.
sherd is ~ 5 inches in height, the two thinned glazes used as leaf wash are,
left to right, mica_matte_Z34_Rutile, leaf_Z34_Rutile.
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 0.22
Al2O3 1.03
SiO2 4.55
molecular percent Silica 37.2%
K2O 0.72
Al2O3 1.03
SiO2 7.06
molecular percent Silica 41.9%
K2O 0.30
Al2O3 0.62
SiO2 2.9
molecular percent Silica 37.9%
K2O 0.34
Al2O3 1.04
SiO2 6.24
molecular percent Silica 42.35%
A leaf is softened by soaking in water laced with water softener. After
the pot is glazed, the leaf is pressed
I describe the leaf stains used as underfired glazes, because without a viable
glaze as substrate, these compositions would not mature,
For the plate: With the stem at the bottom, from left to right, the thinned
glazes leaf_Z35_2, and leaf_Z35_1
For the sherd: with the stem at the bottom, from left to right, the thinned
glazes mica_matte_Z34_Rutile, and leaf_Z34_Rutile
The appearance of these two leaf prints can be said to be nearly identical
to each other
In contrast with the recent prior attempts in both of these leaves, the
secondary and even a few tertiary veins,
These four stains are notably distinguished from prior stains by high rutile,
wherefore I attribute the patterns
The strong outline of the leaf print on the plate is the result of an extra
thick layer of wash applied around the edge.
are seen clearly, however, the color of the
print is a rather uninteresting monochrome brown.
Image of the plate with glaze satIron_ZG_0 and leaf.
Image of a sherd 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 of plate is a crystal springs porcelain from Georgies in
Portland, claybody of
sherd is a grolleg porcelain from Tacoma Clay Art Center.
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 Formula of leaf wash glaze leaf_Z35_2 :
Na2O 0.71
CaO 0.06
MgO 0.01
TiO2 5.64
Empirical Formula of leaf wash glaze leaf_Z35_1 :
Na2O 0.21
CaO 0.06
MgO 0.01
TiO2 7.75
Empirical Formulae of leaf wash glaze mica_matte_Z34_Rutile :
Na2O 0.07
CaO 0.37
MgO 0.02
SrO 0.24
TiO2 3.08
Empirical Formula of leaf wash glaze leaf_Z34_Rutile:
Na2O 0.14
CaO 0.5
MgO 0.02
TiO2 6.43
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 underfired glaze.
likely not even melt.
were applied, respectively, to approximating
half of the leaf.
were applied, respectively,
to approximately half of the leaf.
compared to previous attempts.
in addition to the primary veins, are
prominently stained. The print shows a close resemblance to a leaf skeleton,
except that the lines are considerable broadened.
observed to the high rutile.