Effect of diffuse micro-crystals
The isolated micro-crystals embedded beneath the surface of the glaze
loAlk_loAl_hiSi show their
A much manipulated image of the surface of this glaze is shown, together with
the pot.
bowl is ~ 3.5 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 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 hr hold at 1700 deg F
25 deg F an hour to 1650 deg F then a one hour hold at 1650 deg F
K2O 0.11
Al2O3 0.38
SiO2 4.31
molecular percent Silica 75.7%
presence in a slightly lumpy surface. Only with
magnification are they visible.
Close up Image of the micro-crystals
image of the glaze loAlk_loAl_hiSi
inside
outside
oxidation firing to cone 10 in an electric kiln
Firing profile
Up Fire profile cone 10
Down Fire Profile cone 10
Clay body is a grolleg porcelain from Tacoma Clay Art Center.
glaze composition
Empirical Formula loAlk_loAl_hiSi:
Na2O 0.04
CaO 0.64
MgO 0.21