Reactions between adjoining glazes
The interaction between two adjacent glazes.
Closeups of the interaction region of the two glazes are shown and,
for context, a picture of the pot.
The design is created by painting rubber latex on the bisque pot then after
the latex has cured, applying the main glaze. After drying,
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 .06
Al2O3 .54
SiO2 3.13
molecular percent Silica 62%
K2O .16
Al2O3 .82
SiO2 5.71
molecular percent Silica 73%
The width of the interaction region is a quarter of an inch.
The reaction region contains colors and textures not seen elsewhere in either
glaze. The oil spots of "mashiko_Z19_half" change color and size
the latex is
removed and the open area filled in with a second glaze.
Close up Images of the interaction region
Image of the piece
plate with glaze satIron_ZG_1S_1Munge_1/2 and inlay mashiko_Z19_half
plate is ~9 inches in diameter
oxidation firing to cone 10 in an electric kiln
Firing profiles
Up Fire profile
Down Fire Profile
Clay body is a grolleg porcelain from Tacoma Clay Art Center.
glaze compositions
Background glaze
Empirical Formula satIron_ZG_1S_1Munge_1/2 :
Na2O .53
Li2O .2
CaO .2
MgO .01
Fe2O3 .2
P2O5 .17
Inlay Glaze
Empirical Formula glaze mashiko_Z19_half :
Na2O .15
Li2O .06
CaO .23
MgO .4
Fe2O3 .22
Remarks
in the
interaction region.