Variants on an Oribe glaze of David Woof
Here is my first foray at an Oribe glaze. The original glaze for this work
is the glaze oribe-woof
Everything moves faster in reduction, I have seen the results of the same
glaze and body,
As David Woof fires in reduction in a fuel burning kiln in the range cone 10
to cone 12, and I in an
I was most amazed by the crystals which grew in all of these glazes, I hope
that the close up images
For each of the four glazes shown here, I show close up images of the surface,
and an image of the pot.
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 1650 deg F then a 3 hr hold at 1650 deg F
400 deg F an hour to 1850 deg F then a 2 hr hold at 1850 deg F
300 deg F an hour to 1750 deg F then a 1 hr hold at 1750 deg F
300 deg F an hour to 1700 deg F then a 3 hour hold at 1700 deg F
K2O 0.16
Al2O3 0.29
SiO2 2.7
molecular percent Silica 67.5%
added:
5% Black Copper Oxide
K2O 0.10
Al2O3 0.35
SiO2 2.79
molecular percent Silica 67.1%
added:
5% Black Copper Oxide
K2O 0.13
Al2O3 0.36
SiO2 2.75
molecular percent Silica 66.7%
added:
5% Black Copper Oxide
K2O 0.10
Al2O3 0.29
SiO2 2.68
molecular percent Silica 67.3%
added:
5% Black Copper Oxide
It seems that a small change in the empirical formula of the glaze changes the
morphology of the crystals formed.
In oribe-woof-PAlk are seen acicular crystals, with bands of distinct colors
radiating out from the center.
In both oribe-woof-PAl and oribe-woof-PAlAlk are seen needle crystals, which
form acicular crystals.
The range of colors seen is real, those greens/whites and reds are all visible
with close examination with a
The interesting surface textures are seen only with a thick
application, which is feasable
provided by David Woof, which is the last shown.
fired to the same cone in both reduction and
oxidation, the difference is substantial.
electric kiln at cone 10, I expected this glaze would
be substantially underfired, hence the three variants.
of the surface, much enhanced, give some indication of
the range of crystals formed.
oribe-woof-PAlk
close ups of glaze oribe-woof-PAlk
oribe-woof-PAlk
bowl is ~3.5 inches in diameter
oribe-woof-PAl
close ups of glaze oribe-woof-PAl
oribe-woof-PAl
bowl is ~3.5 inches in diameter
oribe-woof-PAlAlk
close ups of glaze oribe-woof-PAlAlk
oribe-woof-PAlAlk
bowl is ~3.5 inches in diameter
oribe-woof
close ups of glaze oribe-woof
oribe-woof
bowl is ~3.5 inches in diameter
oxidation firing to cone 10 in an electric kiln
Firing profiles
Up Fire profile cone 10
Down Fire Profile cone 10
Clay body is a grolleg porcelain from Clay Art Center in Tacoma, WA.
glaze compositions
Empirical Formula oribe-woof-PAlk :
Na2O 0.05
CaO 0.64
MgO 0.15
P2O5 0.01
Empirical Formula oribe-woof-PAl :
Na2O 0.04
CaO 0.67
MgO 0.19
P2O5 0.01
Empirical Formula oribe-woof-PAlAlk :
Na2O 0.05
CaO 0.64
MgO 0.18
P2O5 0.01
Empirical Formula oribe-woof :
Na2O 0.04
CaO 0.69
MgO 0.17
P2O5 0.01
Remarks
Perhaps the composition changes as well.
jewelers lope. Though that lovely aqua is seen
only in the original glaze oribe-woof.
as these glazes have high viscosity.