Reverse Iron On Iron
The glaze satIron_ZT_Mashiko as a decoration inlay on the glaze mashiko_Z19_1 is seen here in the second picture:
Here I show the reversal of background and decoration, mashiko_Z19_1 as decorative inlay with background glaze satIron_ZT_Mashiko.
The design is a mask cut from shelf paper, affixed to the pot before the
background glaze is poured. The dry pot is coated with
an emulsion wax. When dry the mask is peeled, and design filled in using an
ear syringe.
cone 10 oxidation
Firing profile
Up Fire profile
150 deg F an hour to 250 deg F
400 deg F an hour to 2050 deg F
120 deg F an hour to 2250 deg F
60 deg F an hour to 2310 deg F with a hold of 20 minutes at 2310 deg F
Down Fire Profile
A half hour hold at 1750 deg F
A three hour hold at 1700 deg F
slow downfire at 25 deg F an hour in the interval 1700 deg F to 1650 deg F
A one hour hold at 1650 deg F
The cones show this as a cone 10 firing.
K2O .17
Al2O3 .82
SiO2 5.76
molecular percent Silica 74 %
K2O .08
Al2O3 : .6
SiO2 : 4.37
molecular percent Silica 69
The dramatic difference in the appearance of the glaze mashiko_Z19_1 is the
result of a thinner glaze application.
Clay body is a grolleg porcelain from Tacoma Clay Art Center.
glaze compositions
Empirical Formula glaze mashiko_Z19_1 :
Na2O .17
Li2O .06
CaO .20
MgO .40
Fe2O3 .22
Empirical Formula glaze satIron_ZT_Mashiko :
Na2O .08
Li2O .17
CaO .49
MgO .18
Fe2O3 : .23
P2O5 : .16
mug is ~ 5 inches high
glaze satIron_ZT_Mashiko with glaze mashiko_Z19_1 decoration
Remarks