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glaze test for toni martens ultra clear ^6 ox.

updated thu 28 feb 08


Alisa Clausen on wed 27 feb 08

Glaze test for Toni Martens Ultra Clear ^6 ox.

Source: Clayart

Credited to: Toni Martens, South Africa

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.
Standard Substitutions in all tests:
Local Boron Frit is used for Frit 3134
Forshammer (a half and half Potash and Soda spar) is the only Feldspar used
Local Boron Frit is used for Gerstley Borate
All substitutions are done not by Mol. Wts., but gram for gram.

Recipe Name: Toni Martens Ultra Clear
Cone: 6 Color:
Firing: Oxidation Surface: Glossy
Amount Ingredient
25 Kaolin--EPK
20 Feldspar--C6
30 Frit 169/MOK 623
15 Silica
10 Wollastonite
100 Total

Unity Oxide
.445 Na2O
.046 K2O
.017 MgO
.35 CaO
.002 SrO
.057 BaO
.083 ZnO
1.000 Total
.504 Al2O3
.47 B2O3
.006 Fe2O3
3.571 SiO2
.004 TiO2
.001 P2O5
7.1 Ratio
7.8 Exp


Glossy, very transluscent glaze
Try with Frit 3134 in Northern America