Titanium Colors
A glaze with connected rutile crystal clusters is shown. It is a relative of
the glaze hiAlk_Z3P_MAl
This piece has an inlay of the saturated iron glaze satIron_ZG_1S_Z3J.
The interactions at the interface between the glaze and inlay show coppery
colored crystal clusters with
Because the crystal within the inlay are in focus in these closeups and
markings at the interface are not,
The design is created by adhering a mask and then applying the main
glaze. After drying,
Several closeups of the surface of the glaze, including images of the
interaction between the glaze
bowl is ~ 5 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 1850 deg F then a 2 hour hold at 1850 deg F
300 deg F an hour to 1750 deg F then a 1 hour hold at 1750 deg F
300 deg F an hour to 1700 deg F then a 3 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 0.13
Al2O3 0.63
SiO2 3.43
molecular percent Silica 64.3%
K2O 0.33
Al2O3 0.50
SiO2 3.36
molecular percent Silica 64.7%
seen
here .
the appearance of sand at the seashore and
there are black inclusion as well. These are artifacts seen in
neither of
the individual glazes.
it appears that these crystal clusters
stand above the level of the glaze..
the mask is removed and the open area filled in with a
second glaze, using a bulb syringe
with a needle applicator.
and inlay glaze are shown. A picture of the
bowl is also shown.
Images of the surface and its interaction with the inlay
Image of the glaze hiAlk_Z3P_M_hAl with inlay satIron_ZG_1S_Z3J
inside
outside
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 composition
Background Glaze:
Empirical Formula hiAlk_Z3P_M_hAl:
Na2O 0.49
CaO 0.36
MgO 0.02
P2O5 0.07
TiO2 0.21
Empirical Formulae of inlay glaze satIron_ZG_1S_Z3J :
Na2O 0.48
CaO 0.18
MgO 0.01
Fe2O3 0.17
P2O5 0.17