cone 10 with no holds or slowdowns in downfire
My firings have lots of holds and slow ramps in the downfire, are in that
aspect baroque.
I show the results of that firing here. In each case, I show first the result
of the glaze in the pure
The glazes in the baseline firing have an underglaze decoration created by
slip trailing a
This firing is to cone 10 in oxidation.
The glaze, zincSr_Z3T_PSi_2, in a prior firing with holds in the downfire
The glaze, zincSr_Z3W_0, in prior firings with holds in the downfire
is shown here .
The glaze, hiAlk_satIron, in a prior firing with holds in the downfire
is shown here .
The glaze, oribe-woof-PAlAlk, in a prior firing with holds in the downfire
inside and
outside .
The glaze, wisskirchen-crystals-PAl, in a prior firing with holds in the downfire
inside and
outside .
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
Turn kiln off
K2O 0.09
Al2O3 0.54
SiO2 2.78
molecular percent Silica 64.2%
Added:
2.5% Cobalt Carbonate
K2O 0.07
Al2O3 0.53
SiO2 2.55
molecular percent Silica 61.5%
K2O 0.12
Al2O3 0.74
SiO2 3.48
molecular percent Silica 63.1%
cone 10 with no holds or slowdowns
As a prelude to an investigation of the effects of the
temperature and lengths of holds on a
variety of glazes, I did a baseline
firing. A firing with no holds or slow ramps. This firing is a pure "up,
down" firing.
"up down" firing, followed by an image of the glaze
in a firing with holds in the downfire.
The comparison version is either a
pointer to a previous note, or an image.
contrast glaze on the bisque before glazing the pot.
zincSr_Z3S
zincSr_Z3S with holds in the downfire
zincSr_Z3T_PZn_PSi_2
is shown here .
zincSr_Z3W_0
hiAlk_satIron
ironYellow
ironYellow with holds in the downfire
oribe-woof-PAlAlk
satIron_ZG_Z3N_Z3W
satIron_ZG_Z3N_Z3W with holds in the downfire
wisskirchen-crystals-PAl
oxidation firing to cone 10 in an electric kiln
Firing profiles
Firing profile for this baseline firing
Up Fire profile cone 10
Down Fire Profile cone 10
glaze composition for those glazes not in a prior note:
Empirical Formula zincSr_Z3S:
Na2O 0.37
CaO 0.02
MgO 0.17
SrO 0.15
ZnO 0.20
Empirical Formula ironYellow:
Na2O 0.11
CaO 0.81
MgO 0.01
Fe2O3 0.07
Empirical Formula satIron_ZG_Z3N_Z3W:
Na2O 0.52
CaO 0.24
MgO 0.12
Fe2O3 0.23
P2O5 0.06
