Chrome Colors
This is full gloss glaze containing barium oxide and tin oxide. It's got a
green background with streaks of red
inside of bowl:
Outside of bowl:
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 1750 deg F then a half hour hold at 1750 deg F
300 deg F an hour to 1700 deg F then a Three hour hold at 1700 deg F
25 deg F an hour to 1650 deg F then a one hour hold at 1650 deg F
This glaze has .2% Chrome Oxide added
K2O 0.06
Al2O3 0.37
SiO2 2.27
molecular percent Silica 60.6%
The glaze tsabar-chrome-Z2G, from which this glaze was derived is a glossy
grey-green and heavily crazed.
Lowering the alumina produced the red streaks, but didn't eliminate the green
background.
It is interesting that the transition between chrome green and chrome red
glazes can be a glaze showing both colors.
as a result of the addition of
chrome oxide.
tsabar-chrome-Z2E-2G-2H
bowl is ~3 inches in diameter
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 compositions
Empirical Formula glaze tsabar-chrome-Z2G-2E-2H :
Na2O 0.17
CaO 0.59
MgO 0.01
BaO 0.17
SnO2 0.10
Remarks
This glaze has the same bases (fluxes),
with lower alumina and nearly the same silica:alumina ratio
as tsabar-chrome-Z2G.