Inlay Boundary Color Band

This is an oil spot tenmoku with a bright orange frame at the boundary of the inlay and matrix glaze.
The glaze satIron_mashiko_neph_Imerys as inlay, will exhibit a bright colored border at the interface with many
saturated iron background glazes.

The design is created by adhering a mask and then applying the main glaze. After drying, the mask is removed
and the open area filled in with a second glaze, using a bulb syringe with a needle applicator.

Image of the glaze longquan_iron_mashiko_0

full view

vase is ~ 7 inches high

oxidation firing to cone 10 in an electric kiln

Firing profiles

Up Fire profile

150 deg F an hour to 250 deg F
400 deg F an hour to 1800 deg F
200 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

Down Fire Profile

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

Clay body is cone 10 BMix

glaze composition

Empirical Formula longquan_iron_mashiko_0 :

K2O        0.11
Na2O       0.45
Li2O       0.15
CaO        0.11
MgO        0.18

Al2O3      0.71
Fe2O3      0.19

SiO2       4.27

molecular percent Silica 69%

Inlay Glaze Composition

Empirical Formula satIron_mashiko_neph_Imerys :

K2O        0.08
Na2O       0.11
Li2O       0.28
CaO        0.51
MgO        0.02

Al2O3      0.61
Fe2O3      0.25

SiO2       4.0
P2O5       0.15

molecular percent Silica 66.7%

Remarks

I'd been asked about the bright frame surrounding the inlay here . In response, I show above another
saturated iron glaze in which the inlay glaze satIron_mashiko_neph_Imerys displays a similar artifact at its boundary
with the matrix glaze.

Carol's Home Page