White On White
A white inlay second glaze design with a sharply delimited boundary, on a
translucent white snow glaze.
The contrast is primarily in the texture.
cone 10 oxidation
Firing profile
Up Fire profile
150 deg F an hour to 250 deg F
400 deg F an hour to 2050 deg F
120 deg F an hour to 2250 deg F
60 deg F an hour to 2310 deg F with a hold of 20 minutes at 2310 deg F
Down Fire Profile
A half hour hold at 1750 deg F
A three hour hold at 1700 deg F
slow downfire at 25 deg F an hour in the interval 1700 deg F to 1650 deg F
A one hour hold at 1650 deg F
The cones show this as a cone 10 firing.
K2O 0.14
Al2O3 .44
SiO2 2.7
K2O 0.08
Al2O3 1.32
SiO2 3.75
molecular percent Silica 62 %
The glaze sh_ZJ_2PSi was contaminated with a small bit of redart clay, for the iron.
It is the third bowl with the glaze hankSatin_ZV_0.
The background glaze on the above pot is uniform and untextured, and that
gives one sort of white on white design.
Here we see a textured background, a translucent glaze with with a dusting of
opaque dots.
Clay body is a grolleg porcelain from Tacoma Clay Art Center.
glaze compositions
Empirical Formula background glaze hankPaper_Z18_0 :
Na2O 0.09
Li2O 0.01
CaO 0.40
MgO 0.02
BaO 0.27
SrO 0.07
TiO2 0.1
Empirical Formula design glaze: sh_ZJ_2PSi:
Na2O 0.32
Li2O 0.51
CaO 0.05
MgO 0.04
bowl is ~ 6.5 inches in diameter
An inlay of a high alumina feldspathic glaze on a white background glaze was seen
here:
The white inlay design
glaze hankPaper_Z18_0 with inlay sh_ZJ_2PSi
detail of inlay on above pot