leaf

Some veins in a leaf print are seen here .

Next, three different watered-down glazes, are used as leaf wash. In the result shown here, some indications
of the puckering which gives texture to the flattened leaf are seen in addition to visible veins.

Image of the plate with glaze satIron_ZG_0 and leaf.

full view

plate is ~ 8 inches in diameter.

oxidation firing to cone 10 in an electric kiln

Firing profiles

Up Fire profile

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

Down Fire Profile

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

Clay body is a crystal springs porcelain from Georgies in Portland.

glaze compositions

Empirical Formula satIron_ZG_0 :

K2O        0.1
Na2O       0.49
Li2O       0.19
CaO        0.16
MgO        0.06

Al2O3      0.59
Fe2O3      0.2

SiO2       3.13
P2O5       0.04

molecular percent Silica 63%

Empirical Formulae of leaf wash glaze leaf_Z34:

K2O        0.34
Na2O       0.14
CaO        0.50
MgO        0.02

Al2O3      1.04
Fe2O3      0.02

SiO2       6.24
TiO2       0.51

molecular percent Silica 70.9%

Empirical Formulae of leaf wash glaze jingdezhen_Leaf_Z34 :

K2O        0.14
Na2O       0.00
CaO        0.78
MgO        0.08

Al2O3      1.05
Fe2O3      0.01

SiO2       6.0
TiO2       0.57

molecular percent Silica 70%

Empirical Formulae of leaf wash glaze leaf_Z34_0 :

K2O         0.35
Na2O        0.00
CaO         0.65

Al2O3       1.05

SiO2        6.33
TiO2        0.65

molecular percent Silica 70.1%

A leaf is softened by soaking in water laced with water softener. After the pot is glazed, the leaf is pressed
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 three
underfired glazes: leaf_Z34, jingdezhen_Leaf_Z34, and leaf_Z34_0.

With the stem at the bottom, from left to right the thinned glazes leaf_Z34, jingdezhen_Leaf_Z23, and leaf_Z34_0
were applied respectively to a sector approximating a third of the leaf. Although there is a substantial
difference in the amount of CaO in the washes, the final appearance is not markedly different,
indicating that CaO has a negligible impact on the final result.

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