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glaze test for rust red, 1879, cone 6 redux

updated thu 3 may 07


Alisa Clausen on wed 2 may 07

Glaze test for

Source Pat Horsley

Credited to

Fired on mid fire white stoneware

Firing ramp with an electric controller is:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)
80c p/h to 1220c (176f - 2228f)
15 min. soak
cool down max. to 900c (1652f)
Hold 30 minutes

Shut off kiln

Colorants or additives to a 100 gram batch are measured in percent to the
100 gram batch.

Recipe Name: 1879 Rust Red Cone 6, Redux

Cone: 6 Color:
Firing: Reduction Surface:

Amount Ingredient
28.6 Whiting
17.8 Feldspar--Custer
53.6 Kaolin--EPK

100 Total

10 Frit--Ferro 3134
4 Iron Oxide--Red

Unity Oxide
.028 Na2O
.067 K2O
.011 MgO
.894 CaO
1.000 Total

.716 Al2O3
.008 Fe2O3

1.946 SiO2
.006 TiO2
.001 P2O5

2.7 Ratio
7.6 Exp

Dry, underfired, ochre yellow and rust brown surface.
As it was fired in oxidation and not reduction, it could be the cause of

Best regards from Alisa in Demark