Leopard Spots
Another high phosphorus glaze, this with black leopard spots.
I show a closeup image of the spots and, for reference, 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
A one hour hold at 1750 deg F
A three hour hold at 1700 deg F
A two hour hold at 1650 deg F
K2O .06
Al2O3 .7
SiO2 4.3
molecular percent Silica 67%
cone 10 oxidation
Firing profile
Up Fire profile
Down Fire Profile
The cones show this as a hot cone 10 firing.
Clay body is a grolleg porcelain from Tacoma Clay Art Center.
glaze compositions
Empirical Formula glaze satIron_mashiko_neph_1H_0 :
Na2O .37
Li2O .13
CaO .42
MgO .02
Fe2O3 .26
P2O5 .13
close up
pot
bowl ~ 4 inches in diameter