Glazing Test Tiles - JS Progression Test

Clay Body: Porcelain

Firing Temperature: Cone 6, 2165 degrees F

Firing Atmosphere: Oxidation

Firing Mode: Skutt Electric Kiln, Medium Speed

Glaze Specific Density: 1.40

A glaze created with JS base recipe, with varying % of Copper, Cobalt, Rutile and Titanium

From left,

1. 0.5% Cobalt Carbonate added

2. 1.0% Cobalt Carbonate added

3. 1.0% Cobalt Carbonate and 4% Rutile added

4. 1.0% Cobalt Carbonate, 4% Rutile and 1% Copper Carbonate added

5. 1.0% Cobalt Carbonate, 4% Rutile and 2% Copper Carbonate added

6. 1.0% Cobalt Carbonate, 6% Rutile and 2% Copper Carbonate added

7. 1.0% Cobalt Carbonate, 6% Rutile, 2% Copper Carbonate and 2% Titanium Dioxide added

8. 1.0% Cobalt Carbonate, 6% Rutile, 2% Copper Carbonate and 4% Titanium Dioxide added All of the above are Medium Cool using Skutt Electric Kiln

9. 1.0% Cobalt Carbonate, 6% Rutile, 2% Copper Carbonate and 4% Titanium Dioxide added (Slow Cool)

10. 1.0% Cobalt Carbonate, 6% Rutile, 2% Copper Carbonate and 4% Titanium Dioxide added (Super Slow Cool)

Base Glaze Recipe:

Custar Feldspar 19.8%

Silica 24.3%

Wollastonite 4.5%

Kaolin (Grolleg) 19.8%

Dolomite 9.1%

Talc 4.5%

Frit 3134 18.0%

Base Recipe 100.0%

Bentonite 2.0%

For cost of this glaze, UMF (Unity Molecular Formula) analysis and chart, refer to https://glazy.org/recipes/82605

For cost of this glaze, UMF (Unity Molecular Formula) analysis and chart, refer to https://glazy.org/recipes/81589